An officer manager, who works at a finance company, claims that employees spend less than 4 hours a day, on average. if the office manager wants to conduct a hypothesis test, should they use a left, right or two tailed hypothesis test to analyze whether employees spend less than 5 hours on the phone per day, on average?

2. A real estate agent who would like to claim that a houses in a certain neighborhood have a market value of more than $200,000 on average. To test this claim, she randomly selected 35 houses Im the neighborhood and finds that the sample mean market value is $201,600 with a sample standard deviation of $20,246. Assume the population is normally distributed. A. Identify the claim and state the bill and alternative hupothesis

b. Calculate the test statistic for this hypothesis test

c. Find the p-value for this hupothesis test

d. What is the decision and interpretation for this hypothesis test.

3.A retail grocery chain owner claims that more than 30% of adults have purchased a new kit in a recent year. In a random sample of 36 adults 25% have purchased the meal kit in a recent year. At a=0.10, is there enough evidence to support the owners claim! A. Identify the claim and state Ho and Ha

b. Determajne whether the hypothesis test is left tailed or two tailed

c. Calculate the appropriate standard test statistic

d. Decide whether to reject the null hypothesis or fail to reject the bill hypothesis

f. Interpret the decision in the context of the original claim

A sales associate would like to test the claim that the average number of sales made by a sales associate per year is grater than 800 sales. To test this claim the sales associate collects data on a sample of 30sales and records a sample mean of 820 sales. From past data it is known that the population standard deviation is 75 sales. Assume the population is normally distributed. At the a= 0.5 level of significance test the claim.

A identify the claim and state the null and alternative hypothesis

b. Calculate the test staristic

c. Find the p-value

d. Make a decision

e.interpret the results

William a chef claims thag his meatballs weight is not equal to 3 ounces on average. Several of his customers do not believe him, so he decides to do a hypothesis test at a 1% significance level, to persuade them. He cooks 19 meatballs. the mean weight of the sample meatballs is 2.9 ounces. Williams knows from experience that the standard deviation for his meatballs weight is 0.5 ounces.

Ho:u=3:Ha:u=with a line through the equals symbol 3

a=0.01(significance level)

what is the test staristic (z score) of this one mean hypothesis test rounded to two decimal places?