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Question 121

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7. There are 13 players on a basketball team.Six players have Nike endorsements,threc have Reebok,two have Converse, and two players do not have endorsements. What is the probability that the five starters: a.all have Nike endorsements? b.are two non-endorsed players, one with a Reebok endorsement and two with Nike? c.Are the three Reebok and two Converse endorsed players?

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Question 122

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Texts: The US Census Bureau needs to estimate the median income of females in the US, so they collect incomes from 4164 females. State the individual, variable, population, sample, parameter, and statistic. Individual: Each female in the US Variable: Income Population: All females in the US Sample: The 4164 females in the US who were sampled Parameter: The median income of all females in the US Statistic: The median income of the 4164 females in the US who were sampled

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Question 123

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In probability notation, the percentage of South residents can be expressed as P(R3) - Percentage of seniors 12.3 14.8 14.8 10.7 Region East North South West Percentage of population 24.3 16.6 36.4 22.7 100.0 Sevent the resident selected is a senior R₁ = event the resident lives in the East R₂ = event the resident lives in the North R3 = event the resident lives in the South Revent the resident lives in the West a. Do the same for the percentage of Eastern residents. Choose the correct answer below. OA. P(R₁) OB. P(R₂) C. P (R3) OD. P(R4) b. Do the same for the percentage of Western residents who are seniors. Choose the correct answer below. ⒸA. P(R41S) OC. P(R₁1S) OE. P(SIR₁) OG. P(SIR₂) OB. P(R31S) OD. P(SIR4) OF. P(SIR3) OH. P(R₂1S) c. Do the same for the percentage of seniors who are Western residents. Choose the correct answer below. OA. P(R31S) OC. P(SIR3) OE. P(SIR₂) OG. P(SIR4) OB. P(SIR₁) OD. P(R₁ IS) OF. P(R41S) OH. P(R₂1S) In probability notation, the percentage of South residents can be expressed as P(R3) - Percentage of seniors: 12.3 14.8 14.8 10.7 Region East North South West Percentage of population: 24.3 16.6 36.4 22.7 100.0 Let R₁ be the event that the resident lives in the East. Let R₂ be the event that the resident lives in the North. Let R₃ be the event that the resident lives in the South. Let R₄ be the event that the resident lives in the West. a. Do the same for the percentage of Eastern residents. Choose the correct answer below. OA. P(R₁) OB. P(R₂) C. P(R₃) OD. P(R₄) b. Do the same for the percentage of Western residents who are seniors. Choose the correct answer below. OA. P(R₄1S) OC. P(R₁1S) OE. P(SIR₁) OG. P(SIR₂) OB. P(R₃1S) OD. P(SIR₄) OF. P(SIR₃) OH. P(R₂1S) c. Do the same for the percentage of seniors who are Western residents. Choose the correct answer below. OA. P(R₃1S) OC. P(SIR₃) OE. P(SIR₂) OG. P(SIR₄) OB. P(SIR₁) OD. P(R₁IS) OF. P(R₄1S) OH. P(R₂1S)

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Question 124

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Useful formula: a.If a purchase is selected at random,what is the probability that this purchase is for a printed book (hardcover or paperback)? Type Hardcover Paperback Digital Audio Probability .15 .40 .35 .10

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Question 125

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Texts: CNNBC recently reported that the mean annual cost of auto insurance is

1014. A ss u m e t h es t an d a r dd e v ia t i o ni s

116. You will use a simple random sample of 56 auto insurance policies. Find the probability that a single randomly selected policy has a mean value between

1034.2 an d

1048.1. P(1034.2 < X < 1048.1) Find the probability that a random sample of size n = 56 has a mean value between

1034.2 an d

1048.1. P(1034.2 < M < 1048.1)

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Question 126

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Exercise 13.39 Algo (Analysis of Variance and the Completely Randomized Design) Question 9 of 14 Hint(s): Check My Work (remaining) A Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people (Pew Research website, http://www.pewinternet.org/2017/10/04/americans-attitudes-toward-a-future-in-which-robots-and-computers-can-do-many-human-jobs/). Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Tax Fast-Food Nurse Auditor Worker 4 6 5 5 7 7 6 6 6 3 5 5 3 8 7 3 4 4 4 6 5 4 5 5 a. Use α = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. Round to 2 decimals. The p-value is ________. What is your conclusion? We ________ the null hypothesis that the mean scores are the same for the three professions. b. Use Fisher's LSD procedure to compare the belief that a person's job will be automated for nurses and tax auditors. LSD = ________. What is your conclusion? We ________ the null hypothesis that the two population means are equal. (reject/cannot reject) Hint(s):

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Question 127

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If you were creating an interval that you hope contains the population mean, you would begin with the whose symbol is I A/ A Answer 2 This is the point estimate for a mean. Your answers should be words only. If you were creating an interval that you hope contains the population mean,you would begin with the whose symbol is I Answer2 This is the point estimate for a mean. Your answers should be words only

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Question 128

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A single-sample t test is conducted on a sample of 25 people who were selected from a large population estimated at 2500 people. The critical cutoffs for a two-tailed test at a p level of 0.05 would be (HINT: Use a table; Appendix B in your book, pg. B-5) -1.711 and 1.711, -1.980 and 1.980, -2.060 and 2.060, -2.064 and 2.064. 2 points Question

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Question 129

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19 The president of a large university announced that the school would be switching to dorms that are all single sex,because,he says,research shows that single-sex dorms reduce the number of student hook-ups for casual sex,He cited a study from his university that students in coed dorms report hooking up for casual sex more often than students in same-sex dorms.What,if any,common statistical mistake is the university president making with this conclusion? 2011. O There is nothing statistically wrong with the president's conclusion. He is using data from one study at one university O He is not taking into account confounding variables,such as students'sexual preferences. O There is not enough information to determine if there is anything statistically wrong with the president's conclusion. O He is assuming causation from an observational study

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Question 130

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Texts: Find p and q. Round your answers to three decimal places. n = 153 and X = 66 X b

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Question 131

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Please help. 85.9 62.2 87.9 88.5 58.1 93.4 93.6 92.2 93.6 9.4 88.1 87.7 Complete parts (a) through (f) below to calculate t-values. 88.8 91.7 90.8 Is pitch speed a variable? Why is it important to know this when determining the type of confidence interval you may construct? Pitch speed is a variable. This is important to know because confidence intervals for a variable are constructed on quantitative data. The data could come from a population that is normally distributed. Which normal probability plot represents the data? A. B. C. D. Draw a boxplot to verify the data set has no outliers. Which boxplot below represents the data? A. B. C. D. What condition must the pitch speed of the pitcher's four-seam fastball satisfy?

A t-interval cannot be constructed because there is an outlier.
A t-interval can be constructed because there are outliers and the data can reasonably be assumed to come from a normal distribution.
A t-interval cannot be constructed because the data cannot reasonably be assumed to come from a normal distribution.
A t-interval can be constructed because there are no outliers and the data can reasonably be assumed to come from a normal distribution.

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Question 132

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Construct and interpret a 95% confidence interval for the mean pitch speed of the pitcher's four-seam fastball. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.

The 95% confidence interval is [lower bound, upper bound].
The interval cannot be found.

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Question 133

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Help with B and C Part. the drywall and electrical problems, and there is also strong evidence of respiratory difficulties due to the emission of hydrogen sulfide gas. An extensive examination of 56 homes found that 46 had such problems. Suppose these 56 were randomly sampled from the population of all homes having Chinese drywall. (a) Does the data provide strong evidence for concluding that more than 50% of all homes with Chinese drywall have electrical/environmental problems? Carry out a test of hypotheses using = 0.01. State the appropriate null and alternative hypotheses. OHop=0.5 Hp

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Question 134

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Texts: Please answer e and f, but it might help to look at previous questions for more info, thanks. 3. Consider a uniform distribution unif(0,2) and a uniform distribution unif[0,2]. X and Y are independent. (25+5 points)

For the pdf of Y, what is the value of the height, namely the height of the rectangular part of the pdf?
Write down the cdf of X.
Calculate the 80th percentile of Y. This is the value such that the probability is 0.8 that Y is less than this value.
Suppose we have a new variable Z = X + Y. What is the value of X and Y when Z is at its minimum? What's the value of X and Y when Z is at its maximum?
Find the highest point of the pdf.

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Question 135

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Texts: According to a report done by S&P, the mean lifetime of the light bulbs it manufactures is 42 months. A researcher for a consumer advocate group tests if the mean lifetime is 9 months. Can we conclude at the 0.05 level of significance that the population mean lifetime of light bulbs made by this manufacturer differs from 42 months? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. If necessary, consult a list of formulas. a) State the null hypothesis H0 and the alternative hypothesis Ha. H0: μ = 42 Ha: μ ≠ 42 b) Determine the type of test statistic to use. Choose one. The appropriate test statistic to use is the t-test. c) Find the value of the test statistic. (Round to three or more decimal places.) t = (x̄ - μ) / (s / √n) d) Find the two critical values. (Round to three or more decimal places.) The critical values can be found using a t-distribution table or a statistical software. e) Can we conclude that the population mean lifetime of light bulbs made by this manufacturer differs from 42 months? Yes or No.

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Question 136

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Texts: Last year, 46% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 40% planned to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 75 business owners. a. How many business owners in the survey planned to provide a holiday gift to their employees this year? Round your answer to the nearest whole number. b. Suppose the business owners in the sample do as they plan. Conduct a hypothesis test that can be used to determine whether the proportion of business owners providing holiday gifts had decreased from last year. State the hypotheses: Ho: p = 0.46 H1: p < 0.46 Compute the test statistic and p-value. z-value: p-value: c. Using a 0.02 level of significance, would you conclude that the proportion of business owners providing gifts decreased? - We would conclude that the proportion of business owners providing gifts has decreased from last year to this year. What is the smallest level of significance for which you could draw such a conclusion?

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Question 137

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Texts: In an experiment designed to test the output levels of three different treatments, the following results were obtained: SST = 350, SSTR = 140, n = 19. Set up the ANOVA table. (Round your values for MSE and F to two decimal places, and your p-value to four decimal places.) Source of Variation Sum of Squares Degrees of Freedom Mean Square p-value Treatments 140 2 70 0.0000 Error 210 16 13.13 Total 350 18 Test for any significant differences among the means of the three treatments. State the null and alternative hypotheses. Ho: Not all the population means are equal. H1: At least two of the population means are different. Find the value of the test statistic. (Round your answer to two decimal places.) F = 70 / 13.13 = 5.33 Find the p-value. (Round your answer to four decimal places.) p-value = 0.0000 State your conclusion. Reject Ho - There is sufficient evidence to conclude that the means of the three treatments are not equal.

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Question 138

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All I know is that we have to find the theta that makes Fx non-decreasing. Please help me figure out the rest.Also, please do not copy and paste from the old posts. They are wrong. A continuous random variable X has a cumulative distribution 0, x

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Question 139

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Given a set of data that is skewed-right,there is at least% of the data within 2 standard deviations. Fill in the blank with the best answer: 00 O68 75 89 95 99.7

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Question 140

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← Express the confidence interval 0.253 ± 0.046 in the form of p-E Express the confidence interval 0.2530.046 in the form of p-E

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