Five years ago, a survey found that the proportion of city employees who commute to work by car is 8%. A local city commissioner claims that the percentage is higher than it was five years ago. Data on employee commuting by car was collected on a random sample of 1000 employees and found 12% of employees commute by car. Test an appropriate hypothesis and state your conclusion at the 10% level of significance.   State the alternative hypothesis, the test statistic, your decision and your findings.

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A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

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A: Parameter is a numerical measurement that describing a characteristic of a population.

Q: Suppose 4 percent of the children in the US are thought to be near the juvenile diabetes threshold.…

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Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

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Q: You    want    to    test    whether    the    proportion    of    men    who    smoke    is…

A: Given that  Male  Female  Sample size (n1) = 200 Sample size (n2) = 200 Smoke (x1) = 62 Smoke…

Q: In 2016, the US poverty rate was 12.7%. During that year, 375 families where randomly selected in…

A: From the given information, let X be the number of families were found to be living below the…

Q: Does the sample size ? affect the mean of all possible sample means? Explain your answer.

A: According to central limit theorem, for large sample (>30) or if the population follows normal…

Q: The digital marketing specialist would like to test the claim that the percent of customers who use…

A: Formula : Test statistic

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for…

A: a) null Hypothesis H0 - μ =145     Alternate Hypothesis H1 - μ <> 145 (μ not equal to 145) b)…

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: 7. Sample Reliability. Although Nielsen surveys only a few thousand households out of the millions…

A: We have to answer questions related to sampling.

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A: It is given that the SAT scores for 10 students and their college GPAs.

Q: The General Social Survey determined in 2016 that 57% of US Residents think that the use of…

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Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given : Mean = μ = 0.36  Level of significance = 0.05 p^ = xn    = 31118    = 0.2627

Q: Select the most appropriate response. Five years ago, a survey found that the proportion of city…

A: Solution:  The null and alternative hypotheses are:

Q: A software company is interested in improving customer satisfaction rate from the 66% currently…

A: From the provided information, A software company is interested in improving customer satisfaction…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 34%. Given the…

A: Given,Past studies have indicated that the percentage of smokers was estimated to be about 34%. That…

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population…

A: Sample of size 32 or greater is consider as large sample .

Q: Please give me correct solution with explanation.

A: The objective of the question is to identify which attribute is not a strength of the study's…

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A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

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A: From the provided information, 47% of the general consumer population in the United States is loyal…

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…

A: Here use  proportion test for 2 sample

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Q: What is the likely media when the mean is 9 the sample variance is 7.31 and the skew is 1.04

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Q: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

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A: Let a data set have a high sample variance. The histogram is used to visualize a grouped frequency…

Q: How does an observed sample mean qualify as a common outcome?

A: