In a survey of 3084 adults aged 57 through 85 years it was found that 81.9% of them used at least one prescription medication. a. How many of the 3084 subjects used at least one prescription medication? b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication  Please show solving steps and if possible what excel functions are used to get these answers.

What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c. 2.58 d. 1.96

Answer part B

If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion.

4. A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99% confidence interval of the population proportion.

Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20 miles per day. Calculate a 98% confidence interval for the sample proportion.  What Z Score was used?

Please help me solve: A. how many subjects have at least one Rx B. construct a 99% confidence interval

In a survey of 3116 adults aged 57 through 85​ years, it was found that 86.2​% of them used at least one prescription medication. Complete parts​ (a) through​ (c) below. a. How many of the 3116 subjects used at least one prescription​ medication? b. Construct a​ 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. c. What do the results tell us about the proportion of college students who use at least one prescription​ medication?     A. The results tell us that there is a​ 90% probability that the true proportion of college students who use at least one prescription medication is in the interval found in part​ (b).   B. The results tell us​ that, with​ 90% confidence, the probability that a college student uses at least one prescription medication is in the interval found in part​ (b).   C. The results tell us​ that, with​ 90% confidence, the true proportion of college students who use at…

Out of 500 people sampled, 145 received flu vaccinations this year. Based on this, construct a 90% confidence interval for the true population proportion of people who received flu vaccinations this year.Give your answers as decimals, to three places

b. In the year 2000, a survey of 1171 U.S. adults were asked who they felt was the greatest President. Of those surveyed, 397 reported that Abraham Lincoln was the greatest President. Use this data to construct a 99% confidence interval for the population proportion of all U.S. adults who would say that Abraham Lincoln was the greatest president before the year 2000. Answer using decimals and round to four decimal places