(a) Suppose that you would like to know if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day. What would you need to assume about the sample in order to use the given sample data to answer this question? (Select all that apply.) We would need to assume that the sample was randomly selected or is representative of the population of white-collar workers in the United States. V We would need to assume that all observations are dependent or all observations are independent. O We would need to assume that the distribution of the population of times is normal or that the sample size is large. O we would need to assume that the distribution of the population of times is normal or that the sample size is small. V We would need to assume that all white-collar workers were surveyed or the sample is representative of the population of white-collar workers in the United States. test to decide if there is evidence that the mean time spent checking work email for white-collar workers in (b) Given that any concerns about the sample were satisfactorily addressed, carry out the United States is more than half of the 8-hour work day. Suppose that the sample standard deviation was s = 1.4 hours. Use 0.05 significance level. State the appropriate null and alternative hypotheses. O Ho: H< 4 H:u > 4 O Ho: H = 4 Hạiu > 4 O Ho: H> 4 Hoiu < 4 O Ho: H = 4 H: u < 4 O Hoi H = 4 Find the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) t = P-value =

A 2014 Pew Research Center Survey asked 2,002 adults about the intersection of politics and science. Of the survey participants, 1,281 responded "neither" when asked if they perceive scientists as politically liberal or conservative. What are the values of p′, "successes", or the estimated proportion of Americans who perceive scientists as neither politically liberal or conservative, and q′, the estimated proportion of Americans who perceive scientists as politically liberal or conservative? Answer in decimal form, rounding to the nearest hundredth.

Please help answering this one:

In a study conducted by a human resource management​ organization, 492 human resource professionals were surveyed. Of those​ surveyed, 83​% said that their companies conduct criminal background checks on all job applicants. Complete parts​ (a) through​ (d).       Question content area bottom Part 1a. What is the exact value that is 83​% of 492 survey​ subjects?

A report states that 45% of American adults were obese. In this report, adults were considered to be 20 years of age or older.     If about 71% of Americans are adults (20 and over), use the U.S. population estimate of 301 million people to calculate the number of American adults age 20 and older.

The Humane Society is interested in finding out how many households in America have at least one cat. How many households must be surveyed to be 95% confident that the estimate will be within 4% of the true population percentage?

In 2014, what ratio of construction worker injuries resulted in death?a.1 out of 5Correctb.1 out of 50Incorrectc.1 out of 100Incorrectd.1 out of 1,000

There are​ 64% of US adults who own a​ smartphone, up from​ 35% in 2011. Smartphones have become an important way for Americans to​ communicate, go​ online, access and share information. The Pew Research Center surveyed 1635 people in​ November, 2014 on smartphone ownership. Their goal was to learn how Americans use their smartphone devices.   Identify the population and the sample.

suppose 15 percent of the computers in some university labs are defective

A report says that the average amount of time a 10-year-old American child spends playing outdoors per day is between 20.5 and 25.66 minutes. What is the margin of error in this report?