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Name: Date: Year and Section: Directions: Answer the following questions below. 1. Although there is a popular belief that herbal remedies such as gingko biloba and ginseng improve learning memory in healthy adults, these effects are usually not supported by well-controlled rescarch (Person, Bringlov, Nilsson, & Nyberg, 2004). In a typical study, a researcher obtains a sample of n 36 participants and has each person take herbal supplements every day for 90 days, At the end of the 90 days, cach person takes standardized memory test, For general population, scores from the test are normally distributed with a mean of u= 80 and a standard deviation of s 18, The sample of research participants had an average of M- 84. A. Assuming two-tailed test, state the null hypothesis in a sentence that includes the two variables being examined. B. Using symbols, state the hypothesis (Ho and Ha) for the two tailed test. C. Sketch the appropriate distribution, and locate the critical region for a - .05. D. Calculate the test statistic (z score) for the sample. E. What decision should be made about the null hypothesis, and what decision should be made about the effect of the herbal supplements?

Name: Date: Year and Section: Directions: Answer the following questions below. 1. Although there is a popular belief that herbal remedies such as gingko biloba and ginseng improve learning memory in healthy adults, these effects are usually not supported by well-controlled rescarch (Person, Bringlov, Nilsson, & Nyberg, 2004). In a typical study, a researcher obtains a sample of n 36 participants and has each person take herbal supplements every day for 90 days, At the end of the 90 days, cach person takes standardized memory test, For general population, scores from the test are normally distributed with a mean of u= 80 and a standard deviation of s 18, The sample of research participants had an average of M- 84. A. Assuming two-tailed test, state the null hypothesis in a sentence that includes the two variables being examined. B. Using symbols, state the hypothesis (Ho and Ha) for the two tailed test. C. Sketch the appropriate distribution, and locate the critical region for a - .05. D. Calculate the test statistic (z score) for the sample. E. What decision should be made about the null hypothesis, and what decision should be made about the effect of the herbal supplements?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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Name: Date: Year and Section: Directions: Answer the following questions below. 1. Although there is a popular belief that herbal remedies such us gingko biloba and ginseng improve learning memory in healthy adults, these effects are usually not supported by well-controlled research (Person, Bringlov, Nilsson, & Nyberg, 2004). In a typical study, a researcher obtains a sample of n= 36 participants and has cach person take herbal supplements every day for 90 days, At the end of the 90 days, cach person takes standardized memory test, For general population, scores from the test are normally distributed with a mean of u= 80 and a standard deviation of s = 18. The sample of research participants had an average of M - 84. A. Assuming two-tailed test, state the null hypothesis in a sentence that includes the two variables being examined. B. Using symbols, state the hypothesis (Ho and Ha) for the two tailed test. C. Sketch the appropriate distribution, und locate the critical region for a = .05. D. Calculate the test statistic (z score) for the sample. E. What decision should be made about the null hypothesis, and what decision should be made about the effect of the herbal supplements?
Transcribed Image Text:Name: Date: Year and Section: Directions: Answer the following questions below. 1. Although there is a popular belief that herbal remedies such us gingko biloba and ginseng improve learning memory in healthy adults, these effects are usually not supported by well-controlled research (Person, Bringlov, Nilsson, & Nyberg, 2004). In a typical study, a researcher obtains a sample of n= 36 participants and has cach person take herbal supplements every day for 90 days, At the end of the 90 days, cach person takes standardized memory test, For general population, scores from the test are normally distributed with a mean of u= 80 and a standard deviation of s = 18. The sample of research participants had an average of M - 84. A. Assuming two-tailed test, state the null hypothesis in a sentence that includes the two variables being examined. B. Using symbols, state the hypothesis (Ho and Ha) for the two tailed test. C. Sketch the appropriate distribution, und locate the critical region for a = .05. D. Calculate the test statistic (z score) for the sample. E. What decision should be made about the null hypothesis, and what decision should be made about the effect of the herbal supplements?
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