Answer Happy

The following data are the amounts that a sample of 15 customers spent for lunch ($) at a fast-food restaurant. Complete parts (a) through (d) below. 7.07 6.81 5.95 7.48 4.87 6.32 5.80 6.54 8.30 9.51 6.52 5.52 7.93 8.30 9.66 a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast-food restaurant. (Round to two decimal places as needed. Do not include the $ symbol in your answer.) The table below contains a certain social media company's penetration values (the percentage of a country's population that use this social media) for 14 countries. Complete parts a through c below. 14 48 21 28 15 15 83 56 29 38 26 23 40 30 D a. Construct a 95% confidence interval estimate for the population mean social media penetration. The 95% confidence interval estimate is from to (Round to two decimal places as needed.) Q Search a. Construct a 95% confidence interval estimate for the population proportion of subscribers that would upgrade to a new cellphone at a reduced cost. SAS (Round to four decimal places as needed.) Q Search Screen Sh 2022-07...14.3 Screen She 2022-07 4.4 A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 130 of the subscribers would upgrade to a new cellphone at a reduced cost. Complete parts (a) and (b) below. •