Proctor & Gamble claims that at least half the bars of lvory soap they produce are 99.44% pure (or more pure) as advertised. Unilever, one of Proctor & Gamble's competitors, wishes to put this claim to the test. They sample the purity of 130 bars of Ivory soap. They find that 54 of them meet the 99.44% purity advertised. What type of test should be run? z-test of a proportion or t-test of a mean   The alternative hypothesis indicates a : a. right-tailed test b. left-tailed test c. two-tailed test Calculate the p-value.   Does Unilever have sufficient evidence to reject Proctor & Gamble's claim?        yes or no

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Population proportion, Confidence level, Margin of error,

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: Miranda, a quality assurance inspector at a frozen treat factory, checks for product quality using a…

A: Given that,n = 11N = 41

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given that :  p = 0.23 Confidence level : 99% Margin of error : 2.5 % We have to find the sample…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given,   Margin error = 0.015 Population proportion = 0.21   The objective is to find the sample…

Q: How many samples are best when dealing with t-test? a. cannot be determined b. exactly 30 c.…

A: We have given that,  How many samples are best when dealing with t-test? Then,  We will find the…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: From provided information; Margin of error M.E = 4.5% that is 0.045 Confidence level= 90% The z…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given information: Population proportion p=0.9 Confidence level = 97% Margin of error = 4%

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A:

Q: The following six advertising campaigns show the number of ads (x) and the resulting sales revenues…

A: Solution: x y (x-x) (x-x)2 (y-y) (x-x)(y-y) 10 49 0 0 5 0 6 41 -4 16 -3 12 16 49 6 36 5 30…

Q: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given Information: Population proportion p=0.6 Confidence level = 95% = 0.95 Significance level…

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A: From the given information we take 100 simulation of size 25 and the proprtion of head is 0.68.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Solution

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Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: You want to obtain a sample to estimate the percentage of college students in the U.S. that get a…

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Q: For the sample difference scores below, determine if the sample differs from D = 0. Use α = 0.01.…

A: To testH0:D=0H1:D≠0

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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A: Given: Population proportion (p) = 0.69 Confidence level = 96% = 0.96 Margin of error (E) = 3% =…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The formula for the sample size is as follows:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: It is given that, the population proportion is p = 0.63. The margin of error is ME = 0.03. The level…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Solution: From the given information, confidence level is 0.97, p=0.62 and E=0.04.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given that  there is no reasonable preliminary estimation for the population proportion. Let p=0.5…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given: Refer Standard normal table/Z-table OR use excel function "=NORM.S.INV(1-0.02)" to find…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Solution: From the given information, confidence level is 0.95, p= 0.58 and E=0.05.

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: A professor believes that his math students have different IQ than the average college students. He…

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.