Problem related to average running time of movies

Reference no: EM1389861

Nancy believes that the average running time of movies is equal to 140 minutes. A sample of 4 movies was taken and the following running times were obtained. Assume the population of the running times is normally distributed.

150 150 180 170

a. Compute the sample mean and the standard deviation.

b. State the null and alternative hypotheses.

c. Using the critical value approach, test the hypotheses at the 10% level of significance.

d. Using the p-value approach, test the hypotheses at the 10% level of significance.

e. Compute the probability of a Type II error if the true running time of movies equals 130 minutes.

Reference no: EM1389861

Questions Cloud

Determine the amount of slack in each of a projects activity : Determine the amount of slack in each of a project's activities (presented below), and identify the critical path.

Difference in frequency distribution-relative frequency : From a practical point of view, what is the difference between the frequency distribution and relative frequency distribution? Why is a cumulative relative frequency distribution so much more informative that just the relative frequency distributi..

Varying the composition of the ingredients : Assume you have an invitro kit in mol bio lab and require to use it. It has all the ingredients to get yield of your product, which can be a protein or nucleotides.

Team building to be a successful od intervention technique : In which of the following situations is team building likely to be a successful OD intervention technique? A well-loved manager retires and a new manager from outside the department is appointed in her place.

Problem related to average running time of movies : Nancy believes that the average running time of movies is equal to 140 minutes. A sample of 4 movies was taken and the following running times were obtained. Assume the population of the running times is normally distributed.

Find the observed chi sq value : A soybean mutant exhibiting tan colored seed coat was recently recognized. Crossing the mutant with wild-type,yellow-seeded soybean plant gave all yellow seeded soybeans in the first generation.

Determining modelling and simulation : The dying rate in an industrial process is department of many factors and varies according to the following distribution.

Determining histogram and frequency polygon : The following frequency distribution reports the number of frequent flier miles, reported in thousands, for employees of Brumley Statistical Consulting, Inc. during the first quarter of 2004.

Testing the new population having errors : This sample group has errors with a standard deviation of 54.7ft. At the 5% level of significance, test that the new population has errors with a standard deviation equal to 43.7ft.

User Account

All Pages