Purchase Solution

Two hypothesis tests questions involving pressure and the bounce of tennis balls

Not what you're looking for?

Ask Custom Question

Chapter 12 problem 11

A machine is set to produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height The supervisor suspects that the mean bounce has changed and is less than 36 inches. As an experiment 42 balls were dropped from the platform and the mean height of the bounce was 35.5 inches with a standard deviation of 0.9 inches. At the .05 significance level, can the supervisor conclude that the mean bounce height is less than 36 inches?

Chapter 12 problem 3
1. The hypotheses are H0: µ = 240 pounds of pressure and H1: µ not equal to 240 pounds of pressure.
1. A one-tailed test is being applied.
2. A two-tailed test is being applied
3. A three-tailed test is being applied.
4. The wrong test is being applied.
5. None of these is correct

Purchase this Solution
Solution Summary

This posting shows how to perform a hypothesis test on the mean value of the bounce of tennis balls as well as answers a question on the characteristic of a null and alternative hypothesis test.

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

View More Free Quizzes
Related BrainMass Solutions

  • Testing hypothesis - Mean

    82285 Testing of hypothesis of mean is explained A machine is set to produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height.

  • Probability - Statistics - Standard - Deviation

    In previous tests, baseballs were dropped 24 feet onto a concrete surface, and they bounced an average of 92.84 inches. In a test sample of 40 new balls, the bounce heights had a mean of 92.67 inches and a standard deviation of 1.79 inches.

  • Geometry applications

    The radius of a tennis ball is 5 cm. What is the volume of air that surrounds the tennis balls?

  • Mean Bounce Height, Waiting Time, Epox Glue, and Paint Additive

    382635 5 Statistics problems: Mean bounce height, waiting time, Epox glue, paint additive 1. A machine is set produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height.

  • Testing the heights of baseball bounces

    In a test of a sample of 40 new balls, the bounce had a mean of 92.67 in. and a standard deviation of 1.79 in.

  • Z-tests and Linear Regression

    In previous tests, baseballs were dropped 24 feet onto a concrete surface, and they bounced an average of 92.84 inches. In a test sample of 40 new balls, the bounce heights had a mean of 92.67 inches and a standard deviation of 1.79 inches.

  • Comparison Involving Mean - Independent sample t test for golf ball coating

    Formulate and present the rationale for a hypothesis test that Par could use to compare the driving distances of the current and new golf balls. 3 Analyze the date to provide the hypothesis testing conclusion. What is the p-value for your test?

  • Hypothesis Testing for Mother and Daughter Heights

    Word and Excel files attached perform hypothesis tests for Pepsi and health and mother/daughter height, among others.

  • Hypothesis testing for mean

    171640 Hypothesis testing for mean.. Procyon Mfg. produces tennis balls. Weights are supposed to be normally distributed with a mean of 2.035 ounces and a standard deviation of 0.002 ounces.

View More Related Solutions