1 / 7

Hypothesis Testing for the Mean: known

Hypothesis Testing for the Mean: known. Testing a Claim about a Mean: Known. We first need to make sure we meet the requirements. The sample observations are a simple random sample. The value of the population standard deviation is known Either the Population is normal, or

reese-roberson
Download Presentation

Hypothesis Testing for the Mean: known

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hypothesis Testing for the Mean:known

  2. Testing a Claim about a Mean: Known We first need to make sure we meet the requirements. • The sample observations are a simple random sample. • The value of the population standard deviation is known • Either the Population is normal, or Test Statistic for Testing a Claim about a Proportion

  3. Testing a Claim about a Mean: Known P-value method in 5 Steps • State the hypothesis and state the claim. • Compute the test value. (Involves find the sample statistic). • Draw a picture and find the P-value. • Make the decision to reject or not. (compare P-value and • Summarize the results.

  4. Testing a Claim about a Mean: Known The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 152.9 lb. Assuming that is known to be 12.8 lb, use a 0.05 significance level to test the claim that the population mean of all such bear weights is greater than 150 lb. • and • P-value=0.047 • 0.047 < 0.05 so we reject the null. • There is sufficient evidence to support the claim. Or use [Stat]ZTest

  5. Testing a Claim about a Mean: Known A simple random sample of 50 adults is obtained, and each person’s red blood cell count (in cells per microliter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54. Use a 0.01 significance level to test the claim that the sample is from a population with mean less than 5.4, which is a value often used for the upper limit of the range of normal values. What do the results suggest about the sample group?

  6. Testing a Claim about a Mean: Known A Sample of 106 body temperatures with a mean of 98.20 was obtained. Assume that is known to be 0.0565. Use a 0.05 significance level to test the claim that the mean body temperature of the population is equal to 98.6, as is commonly believed. Is there sufficient evidence to conclude that the common believe is wrong?

  7. Testing a Claim about a Mean: Known Homework!! 8-4: 7-19odd

More Related