only do the blank ones
9..EOC44-E Question Helpv at According to a 2016 report, 40% of 18-to-20-yearold students use credit cards for everyday purchases. Suppose a local bank believes that this share will increase over time because of shopping behaviors of students. To test this hypothesis, a random sample of 279 students was selected, 131 of whom use credit cards for everyday purchases. Using a = 0.05, complete parts a through c. a. State the null and alternative hypothesis. Let p be the population proportion. Determine the null hypothesis, H0, and the alternative hypothesis, H1 , Ho: p s 0.4 H1: p > 0.4 (Type integers or decimals. Do not round.) b. What conclusions can be drawn for this test? Identify the critical value. z\"l = 1'64 (Round to two decimal places as needed) Calculate the appropriate test statistic. zp = (Round to two decimal places as needed.) 9.EOC.45'E Question Helpv at A poll from 2016 showed that the share of Americans who are \"extremely proud" to be American has been steadily decreasing since 2000 to 53% in 2016. Suppose the White House staff is concemed that the rating has fallen further. Let's say that out of a random sample of 400 adults, 192 stated that they were "extremely proud" to be American. Using a = 005, complete parts a through d. a. State the null and altemative hypothesis. Let p be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H1. H0: p z 0.53 H1: p 0.30 (Type integers or decimals. Do not round.) b. Determine the p-value for this test and interpret its meaning. Identify the critical value. za = 2.33 (Round to two decimal places as needed.) Calculate the appropriate test statistic. zp = 1.54 (Round to two decimal places as needed.) Determine the p~value for this test and interpret its meaning. p-value = (Round to three decimal places as needed.) 9HE0655-E Question Help V 9 According to an economic organization, the weekly hours worked in manufacturing in a country was 42 hours in 2017. A recent random sample of 50 manufacturing workers in this country was selected, and it was found that they worked an average of 38.8 hours last week with a sample standard deviation of 10.1 hours. 3. Using m= 0.10, is there enough evidence from this sample to conclude that the average number of manufacturing hours worked per week is dierent than 42 hours? b. Determine the precise p-value for this test using Excel. a. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0: |.| = 42 H1: u 42 (Type integers or decimals. Do not round.) Determine the appropriate critical value. Select the correct choice below and ll in the answer box within your choice. (Round to two decimal places as needed. Use a comma to separate answers as needed.) - A- tm= -1.68,1.68' B. 4a: C. (a: Determine the test statistic. ti: (Round to two decimal places as needed.)
