## The adoption of smart phones and social media apps has been much discussed.

Question The adoption of smart phones and social media apps has been much discussed. One aspect of these devices is that students tend to be distracted by their phones during class. A recent survey reported that 860 of 1004 randomly sampled females used their smart phones during class time, compared to 825 of 1009 randomly sampled males. Do these results confirm a higher smart phone usage by females? Analyze this claim using a hypothesis test at the 99% level of confidence.

## Use the one-proportion z-test to perform the specified hypothesis test. Here’s the data:

## Hi! my question is: Writing the hypothesis in symbolic form. Determining the value of the

Question Use the one-proportion z-test to perform the specified hypothesis test. Here’s the data: p-hat = 0.19, n = 100, H0: p = 0.15, Ha: p ≠ 0.15, α = 0.01z = 0.694; p-value > α; do not reject H0z = 1.120; p-value < α; reject H0z = 0.694; p-value α; do not reject H02.(Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim.) Carter Motor Company claims that its new sedan, the Libra, will average better than 32 miles per gallon in the city. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, state the conclusion in nontechnical terms.There is not sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.There is not sufficient evidence to support the claim that the mean is less than 32 miles per gallon.There is sufficient evidence to support the claim that the mean is less than 32 miles per gallon.There is sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.

Question Hi! my question is: Writing the hypothesis in symbolic form. Determining the value of the test statistic. Finding the critical value OR the p-value.Determining if you should reject the null hypothesis or fail to reject the null hypothesis.Writing a conclusion addressing the original claim.A study is done to test the claim that Company A retains its workers longer than Company B. Company A samples 16 workers, and their average time with the company is 5.2 years with a standard deviation of 1.1. Company B samples 21 workers, and their average time with the company is 4.6 years with a standard deviation of 0.9. The populations are normally distributed.

## In a carnival game players are given three darts and throw them at

Question In a carnival game players are given three darts and throw them at a set of balloons at a wall. Suppose there are 8 balloons on the wall. 3 of the 8 balloons have slips of paper in them that say winner while 5 of the 8 balloons have slips of paper that are blank. Suppose you pop a balloon with each of your three darts. If all 3 balloon have “winner” slips you win the grand prize. What is the probability you win the grand prize?How do I go about figuring this out?

## Annual starting salaries for college graduates with degrees in business

Question Annual starting salaries for college graduates with degrees in business administration are generally expected to be between 20,000 and 40,000 . Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired.a. What is the planning value for the population standard deviation?B How large a sample should be taken if the desired margin of error is 500? ? Round your answer to next whole number.How about for-190?110?Would you recommend trying to obtain the 110 margin of error?

## The distribution of serum levels of alpha tocopherol (serum vitamim

Question The distribution of serum levels of alpha tocopherol (serum vitamim E) is approximately normal with mean 860 µg/dL and standard deviation 340 µg/dL. (a) What percentage of people have serum alpha tocopherol levels between 400 and 1000 µg/dL? (b) Suppose a person is identiﬁed as having toxic levels of alpha tocopherol if his or her serum level is