A researcher wants to prove that there is a difference in the average life spans between men and women in Japan. Let mu1 = average life span of Japanese women and mu2 = average life span of Japanese men. A random sample of 10 women showed an average lifespan of 83 years, with a sample standard deviation of 7 years. A random sample of 10 men showed an average lifespan of 77 years, with a sample standard deviation of 6.4 years. Assume that life spans are normally distributed and that the population variances are equal. What are the appropriate null and alternative hypotheses? Group of answer choices Ho: mu1 – mu2 NE 0 and Ha: mu1 – mu2 = 0 Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 > 0 Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 NE 0 Ho: mu1 – mu2 > 0 and Ha: mu1 – mu2 = 0
A researcher wants to prove that there is a difference in the average life spans between men and women in Japan. Let mu1 = average life span of Japanese women and mu2 = average life span of Japanese men. A random sample of 10 women showed an average lifespan of 83 years, with a sample standard deviation of 7 years. A random sample of 10 men showed an average lifespan of 77 years, with a sample standard deviation of 6.4 years. Assume that life spans are normally distributed and that the population variances are equal. What are the appropriate null and alternative hypotheses? Group of answer choices Ho: mu1 – mu2 NE 0 and Ha: mu1 – mu2 = 0 Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 > 0 Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 NE 0 Ho: mu1 – mu2 > 0 and Ha: mu1 – mu2 = 0
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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A researcher wants to prove that there is a difference in the average life spans between men and women in Japan. Let mu1 = average life span of Japanese women and mu2 = average life span of Japanese men. A random sample of 10 women showed an average lifespan of 83 years, with a sample standard deviation of 7 years. A random sample of 10 men showed an average lifespan of 77 years, with a sample standard deviation of 6.4 years. Assume that life spans are normally distributed and that the population variances are equal. What are the appropriate null and alternative hypotheses?
Group of answer choices
Ho: mu1 – mu2 NE 0 and Ha: mu1 – mu2 = 0
Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 > 0
Ho: mu1 – mu2 = 0 and Ha: mu1 – mu2 NE 0
Ho: mu1 – mu2 > 0 and Ha: mu1 – mu2 = 0
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