Help with these please, distribution tables are at the top. Chapter 14 assignment

According to a study conducted by an organization, the proportion of Americans who were afraid to y in 2006 was 0.10. A random sample of 1,300 Americans results in 143 indicating that they are afraid to y. Explain why this is not necessarily evidence that the proportion of Americans who are afraid to y has increased. Click here to view the standard normal distribution table (Egg); Click here to view the standard normal distribution table (Egg); Select the correct choice below and, if necessary, ll in the answer box to complete your choice. 0 A. This is not necessarily evidence that the proportion of Americans who are afraid to y has increased above 0.10 because the sample proportion, D, is very close to 0.10. (Type an integer or a decimal.) O B. This is not necessarily evidence that the proportion of Americans who are afraid to y has increased above 0.10 because the probability of obtaining a value equal to or more extreme than the sample proportion is D, which is not unusual. (Round to four decimal places as needed.) 0 C. This is not necessarily evidence that the proportion of Americans who are afraid to y has increased above 0.10 because the sample size n is more than 5% of the population. 0 D. This is not necessarily evidence that the proportion of Americans who are afraid to y has increased above 0.10 because the value of np(1 - p) is less than 10. Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on the ballot in a large town (voting population over 100,000). An exit poll of 500 voters nds that 240 voted for the referendum. How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.51 ? Based on your result, comment on the dangers of using exit polling to call elections. How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.51? The probability that fewer than 240 people voted for the referendum is D. (Round to four decimal places as needed.) A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 50 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample in the following cases? (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the changes (a) The researcher must ask El more American adults. (Round up to the nearest integer.) According to a survey in a country, 36% of adults do not own a credit card. Suppose a simple random sample of 800 adults is obtained. Complete parts (a) through (d) below. (a) Describe the sampling distribution of 6, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of 6 below. *A. Approximately normal because n S 0.05N and np(1 p) 2 10 B. Not normal because n s 0.05N and np(1 p)210 (x C. Approximately normal because n S 0.05N and np(1 - p)