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9.EOC.44-E Question Help V 0 According to a 2016 report. 41% of 18-1020-yearold students use credit cards for everyday purchases. Suppose a local bank believes that this share will increase over lime because of shopping behaviors of students. To test this hypothesis, a random sample of 234 students was selected, 111 of whom use credit cards for everyday purchases. Using a = 0.05, complete parts a through c. a. State the null and altemative hypothesis, Let p be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H1. Ho: p H1: p 7 (Type integers or decimals, Do not round.) V V 9..EOC45-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 concerned 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 it = 0.05, complete parts a through d. 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 : H1: p Y (Type integers or decimals, Do not round.) 9.EOC.47-E Question Help According to a job website, each job opening on average attracted 245 resumes in 2016. The job market improved in 2017 compared to 2016, which means that more people will likely be switching jobs but also fewer unemployed workers remain in the job market. To find out which trend is stronger, a random sample of 20 employers in a region was taken. Each employer reported how many resumes they received in 2017 for each job opening. Their answers are shown in the accompanying table. Using a = 0.10, complete parts a through d. Click the icon to view the data on resumes received. a. State the null and alternative hypotheses. Determine the null hypothesis, Ho, and the alternative hypothesis, H1. i Job Opening Data X Ho H1 211 219 (Type integers or decimals. Do not round.) 236 254 201 167 262 232 275 227 206 245 224 217 251 244 187 204 251 223 Print Done9.EOC.48-E Question Help Y Q A 2015 survey shows that 46% of Snapchat users are between 18 and 24 years old. Suppose a follow-up survey were recently conducted to investigate if the proportion had changed and that out of a random sample of 235 Snapchat users, it found that 127 users were between 18 and 24 years old. Using a = 0.10, 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. H0: p '7 H1 : p 'V (Type integers or decimals. Do not round.) 9.EOC.50-E Question Help According to an investment firm, the average 401(k) account balance was $95,000 in 2017. To test if this average has recently changed, suppose a sample of 30 401(k) plans was recently selected, and it was found that the average 401(k) balance was $105,914. Assume that the population standard deviation is $26,702. Using a = 0.01, complete parts a through d. a. State the null and alternative hypothesis. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H1 . Ho: H H1 : 14 (Type integers or decimals. Do not round. Do not include the $ symbol in your answers.)9.EOC.52E Question HelpV ' a Suppose a transportation agency would like to test the hypothesis that the average gasoline consumption per car in a country is 6 liters per day. (We're going metric here.) The accompanying data represent the number of liters used per day for 25 randomly selected cars Using a = 0.10. complete parts a through e. Click here to view the data table. Click here to view the tdistribution table. a. State the null and alternative hypotheses. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0:VV H1: V V (Type integers or decimals. Do not round.) ch... "A... ".5..." ;... u... \"in mm... m... um.\" nlinll mm... Ana...\" 0 Number of Gasoline Liters Per Day 9.3 16.4 9.5 11.3 6.1 2.8 6.2 9.0 6 6 7.5 6.8 9.4 0.3 2.5 9 7 4.7 65 5.2 1.4 8.9 7.3 5.4 Q: 9.EOC.53-E Question Helpv 0 According to data only 30% ofAmericans are saving for retirement in a 401 (k). A random sample of 1540 Americans was recently selected, and it was found that 115 of them made contributions to their 401(k) plans this year. Using a = 0.01. complete parts a through c. a. Using a = 0.01, perform a hypothesis test to determine if the percentage of Americans who have made contributions to their 401 (k) plan is more than 30%. Let p be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H1. Ho: p iv H1 : p 'V (Type integers or decimals. Do not round.) 9..EOC55-E Question Help V at 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. a. Using or = 0.10. is there enough evidence from this sample to conclude that the average number of manufacturing hours worked per week is different than 42 hours? b. Determine the precise p-value for this test using Excel. a. Determine the null hypothesis, Ho, and the alternative hypothesis, H1. H0177 H1:V V (Type inTegers or decimals. Do not round.) QHEOCSB-E Question Help V at During 2016, the average monthly bill for digital cable in a country was $105. Suppose a cable company would like to test the hypothesis that the average monthly bill is higher than $105 this year. A random sample of 48 households was chosen, Assume the standard deviation of monthly cable bills in the country is $19. Complete parts a through d. a. Explain how a Type | and Type II error can occur in this hypothesis test. Explain how a Type I error can occur. Choose the correct answer below. A. The average monthly cable bill is greater than $105, but based on the sample it is incorrectly concluded that the average monthly cable bill is less than or equal to $105. 3 B. The average monthly cable bill is less than or equal to $105, but based on the sample it is incorrectly concluded that the average monthly cable bill is greater than $105. C. The average monthly cable bill has changed from $105, but based on the sample it is incorrectly concluded that the average monthly cable bill has not changed from $105. D. The average monthly cable bill is equal to $105, but based on the sample it is incorrectly concluded that the average monthly cable bill has changed from $105. Explain how a Type II error can occur. Choose the correct answer below. A. The average monthly cable bill is equal to $105, but based on the sample i 's incorrectly concluded that the average monthly cable bill has changed from $105. y B. The average monthly cable bill is greater than $105, but based on the sample it is incorrectly concluded that the average monthly cable bill is less than or equal to $105. (2. The average monthly cable bill has changed from $105, but based on the sample it is incorrectly concluded that the average monthly cable bill has not changed from $105. D. The average monthly cable bill is less than or equal to $105, but based on the sample it is incorrectly concluded that the average monthly cable bill is greater than $105. b. Using a = 0,05, compute the probability of a Type II error occurring if the actual average monthly cable bill is $113.