The marketing manager for a home mobility aids needed more information about the age profile of potential customers. The manager predicts that the average age of customers is greater than 70 years. A random sample of 25 customers is selected from various retirement villages and their age (in years) is recorded. This data is located in Sheet A of the Practice Data fileIs there sufficient evidence to support the manager’s claim? Use 0.05 level of significance.The hypothesis to test this claim is

A manager of a company believes that the average age of its customers is 40. However, theCEO of the company thinks that the average age of the company’s customers differs from 40. To testthis, she randomly selected 60 customers, and the average customer age was found to be 42.7 years.Assume the (population) standard deviation for customer age is 8 years. Using a 5% level ofsignificance, does the sample provide enough evidence to refute the claim made by the manager

The proprietor of a boutique in Wollongong wanted to determine the average age of his customers. A random sample of 25 customers revealed an average age of 32 years with a standard deviation of 8 years. Determine a 95% confidence interval estimate for the average age of all his customers.

Kids with phones: A marketing manager for a phone company claims that the percentage of children aged 8-12 who have phones differs from 60%. In a survey of 824 children aged 8-12 by a national consumers group, 453 of them had phones. Can you conclude that the manager's claim is true? Use the =α0.05 level of significance and the P-value method with the TI-84 Plus calculator.Part 1 of 5State the appropriate null and alternate hypotheses.:H0 =p0.60:H1 ≠p0.60This hypothesis test is a ▼two-tailed test.Part: 1 / 51 of 5 Parts CompletePart 2 of 5Compute the value of the test statistic. Round the answer to at least two decimal places.=z

The marketing manager for an electronics chain store wants information about the ages of its customers. Over the next two weeks, at each store location, 100 randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest.stratifiedconvenience    systematicsimple randomcluster

Determine whether the given value is a statistic or parameter.A sample of 100 employees of a company is selected, and the average age is found to be 38 years.