According to an American Laser Centers survey, 32% of adult men said that their stomach is the least favorite part of their body (USA TODAY, March 10, 2009). Assume that this percent- age is true for the current population of adult men. What is the probability that 170 or more adult men in a random sample of 500 will say that their stomach is the least favorite part of their body?

A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a 95% confidence interval for the proportion of adults who have a Facebook page.

When studying radioactive​ material, a nuclear engineer found that over 365​ days, 1,000,000 radioactive atoms decayed to 974,425 radioactive​ atoms, so 25,575 atoms decayed during 365 days.   a. Find the mean number of radioactive atoms that decayed in a day. b. Find the probability that on a given​ day, 52 radioactive atoms decayed.

According to Quantcast analytics of Crossfits.com, 40% of Crossfitters have post-graduate degrees. Suppose we take a random sample of 60 crossfitters. a. Describe the sampling distribution of the sample proportion of Crossfitters who have post-graduate degrees for samples of size 60. b. Find the probability that at least half of the sample 60 Crossfitters have post-graduate degrees.  c. Describe the sampling distribution of the sample proportion of Crossfitters who have post-graduate degrees for samples of size 100

Industry standards suggest that 12 percent of new vehicles require warranty service within the first year. University Toyota in Morgantown, WV sold 10 Toyotas yesterday. Compute the mean of the probability distribution.

A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned.   Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.”    Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations.   1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.

34. What should I buy? A study conducted by the Pew Research Center reported that 58% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 15 cell phone owners is studied. b. What is the probability that fewer than 10 of them used their phones for guidance on purchasing decisions?

Suppose that there is a 15% chance that a randomly selected Stat 240 student wears glasses. Out of a class with 35 students, what is the minimum number of students wearing glasses for the percent to be considered unusually high?   Thanks!

A dowser has correctly located water for a well 1 out of 2 times in Jones County. In Jones County, someone who is just guessing has a 40% chance of locating water for a well. Does this sample provide sufficient evidence that the dowser can locate water and is not just guessing?

The dataset "nurses" is a random sample of 1,000 cases from “Health Care Provider Credential Data” from Washington State Open Data Portal. In the sample, there are 418 CNA's and 278 of the CNA's have expired credentials. Use the statistics from the nurses dataset to answer the following question: "With 90% confidence, what percent of all CNA's on Washington State's healthcare provider list are expired?"