Need help with these non graded

QUESTION 7 A sample of 28 account balances of a credit company was taken to test whether the mean of all account balances is significantly greater than $1,150. Using the sample standard deviation, the test statistic (t) was calculated to be $1.93. We use a 0.05 level of significance. Assume the population of account balances is normally distributed and the population standard deviation is unknown to us. We conclude that the mean of all account balances is significantly greater than $1, 150. (Enter 1 if the conclusion is correct. Enter 0 if the conclusion is wrong.) QUESTION 8 The U.S. Bureau of Labor Statistics reports that 11.1% of U.S. workers belong to unions. Suppose a sample of 359 U.S. workers is collected in 2014 to determine whether union efforts to organize have increased union membership. The sample results show that 48 of the workers belonged to unions. Compute the test statistics. QUESTION 9 The U.S. Bureau of Labor Statistics reports that 10% of U.S. workers belong to unions. Suppose a sample of 400 U.S. workers is collected in 2014 to determine whether union efforts to organize have increased union membership. The sample results show that 44 of the workers belonged to unions. Compute the p-value. QUESTION 10 The U.S. Bureau of Labor Statistics reports that 11.3% of U.S. workers belong to unions. Suppose a sample of 400 U.S. workers is collected in 2014 to determine whether union efforts to organize have increased union membership at 0.025 level of significance. The sample results in a test statistic (z) of 1.46. We conclude that union membership increased in 2014. (Enter 1 if the conclusion is correct. Enter 0 otherwise.)