The mean cost of the ingredients of a chickenparmesan meal bought at the grocery store is$15. Prices from a sample of 50 restaurants for acomparable meal is shown in spreadsheetPRICES (Sample size of 50 prices, average of$13.1672). At an alpha level of .05, can we saythat eating chicken parmesan at a restaurant ischeaper? Formulate your hypotheses and solvethe problem.

Answered: The mean cost of the ingredients of a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A nutrition store in the mall is selling "Memory Booster," which is a concoction of herbs and minerals that is intended to improve memory performance. To test the effectiveness of the herbal mix, a researcher obtains a sample of n = 16 people and asks each person to take the suggested dosage each day for four weeks. At the end of the four-week period, each individual takes a standardized memory test. The scores from the sample produce a mean of M = 24 with SS = 960. In the general population, the standardized test is known to have a mean of m = 20. Do the sample data support the conclusion that the Memory Booster has a significant effect? Use a two-tailed test with a = .05. Include the null hypothesis in symbols, critical region(s), and a conclusion about significance
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A nutrition store in the mall is selling "Memory Booster" which is a concoction of herbs and minerals that is intended to improve memory performance. To test the effectiveness of the herbal mix, a researcher obtains a sample of n = 16 people and has each person take the suggested dosage each day for 4 weeks. At the end of the four-week period, each individual takes a standardized memory test. The scores from the sample produced a mean of M = 26 with a sample variance of s2 = 64. In the general population, the standardized test is known to have a mean of μ = 20. 1. Do the sample data support the conclusion that the Memory Booster has a significant "booster" effect? Test with α = .05. Hint: think about 1- or 2-tail test to use. 2. Compute Cohen's d and r2 to measure the treatment effect size.
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