Women own an average of 15 pairs of shoes. This is based on a survey of female adults by Kelton Research for Eneslow, the New York City–based Foot Comfort Center. Suppose a random sample of 35 newly hired female college graduates was taken and the sample mean was 18.37 pairs of shoes. If σ = 6.12 does this sample provide sufficient evidence that young female college graduates’ mean number of shoes is greater than the overall mean number for all female adults? Use a 0.10 level of significance.
Answer to relevant QuestionsFind the level of confidence assigned to an interval estimate of the mean formed using the following intervals: The recommended amount of water a person should drink is eight 8-oz servings per day. a. Does the sample of educational professionals in Exercise 8.163 show sufficient evidence that the education professionals consume, on ...A random sample of the scores of 100 applicants for clerk-typist positions at a large insurance company showed a mean score of 72.6. The preparer of the test maintained that qualified applicants should average 75.0. a. ...We are interested in estimating the mean life of a new product. How large a sample do we need to take to estimate the mean to within 1/10 of a standard deviation with 90% confidence? After conducting a large number of tests over a long period, a rope manufacturer has found that its rope has a mean breaking strength of 300 lb and a standard deviation of 24 l b. Assume that these values are m and s. It is ...
Post your question