Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platform. But does trust in Pinterest differ by gender? The following sample data show the number of women and men who stated in a recent sample that they trust recommendations made on Pinterest.   Women Men Sample 150 170 Trust Recommendations Made on Pinterest 117 102   What is the point estimate of the proportion of women who trust recommendations made on Pinterest? What is the point estimate of the proportion of men who trust recommendations made on Pinterest? Provide a 95% confidence interval estimate of the difference between the proportion of women and men who trust recommendations made on Pinterest.

When survey respondents deliberately falsify their income this is known as which type of bias?     interviewer bias     nonresponse bias     measurement instrument bias     response bias     selection bias

Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation.     What are the degrees of freedom?

Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1096 adults, 85said that they have a cell phone. Find the value of the test statistic?

TechBuzz is an IT company that monitors the status of large data warehouses. According to TechBuzz, last year the majority of the data servers used by energy-based companies were over-utilized. A sample of 190 servers (all used by energy-based companies) showed that 142 were over-utilized, 12 were used efficiently, and 36 were underutilized. a. What is the point estimate of the proportion of the servers that were under-utilized? b. Determine the margin of error and provide a 95% confidence interval for the proportion of the servers that were over-utilized. c. What is the minimum sam

A poll of 60 people asking “do you prefer dogs or cats?” Was taken, and 53 of those surveyed said they preferred dogs. Find the test statistic used to determine whether more than 98% of those surveyed prefer dogs.

Age and party 2011 The Pew Research Center conductssurveys regularly asking respondents which politicalparty they identify with or lean toward. Among theirresults is the following table relating preferred politicalparty and age. (http://people-press.org/)a) What percent of people surveyed were Republicansor leaned Republican?b) Do you think this might be a reasonable estimate ofthe percentage of all voters who are Republicansor lean Republicans? Explain.c) What percent of people surveyed were under 30 orover 65?d) What percent of people were classified as “Neither”and under the age of 30?e) What percent of the people classified as “Neither”were under 30?f) What percent of people under 30 were classified as“Neither”?

According to the Pew Research Center, 14% of adults rate basketball as their favorite sport. Your boss believes the proportion may be lower among adults over age 65, and wants you to collect evidence to see if this is true. You take a survey of adults over age 65, and only 12 out of 120 of them rate basketball as their favorite sport. What is the test statistic? Group of answer choices -1.79 -6.24 -1.26 -1.65 thanks

Researchers at Purdue University and Wichita State University found that airlines are doing a better job of getting passengers to their destinations on time.t AirTran Airways and Southwest Airlines were among the leaders in on-time arrivals with both having 88% of their flights arriving on time. But for the 12% of flights that were delayed, how many minutes were these flights late? Sample data showing the number of minutes that delayed flights were late are provided in the file named AirDelay. Data are shown for both airlines. Assume population variances are unknown and unequal. AirTran Southwest 34 59 | 43 30 3 45 64 42 33 66 32 42 | 85 30 48 105 45 28 | 38 85 110 50 10 33 50 26 70 75 45 63 52 83 78 27 70 42 35 33 64 65 27 90 38 52 76 (a) Formulate the hypotheses that can be used to test for a difference between the population mean minutes late for delayed flights by these two airlines. (Let u, = population mean minutes late for delayed Airtran flights and u, = population mean minutes…

a) TV stations use ratings to decide which shows to keep or cancel. Therefore, the A. C. Nielsen Company collects data on the TV viewing habits of Americans and publishes the information in Nielsen Report on Television. Suppose that you want to use a paired sample to decide whether the mean viewing times of married men and married women differ; Identify the variable. Identify the two populations. Identify the pairs. Identify the paired-difference variable. Determine the null and alternative hypotheses. Classify the hypothesis test as two tailed, left tailed, or right tailed.   (b) State one possible advantage of using paired samples instead of independent samples