If a researcher is using at statistic to test a null hypothesis about a population, what information is needed from the population to calculate the t statistic? O a. You must know the population mean O b. You must know the population mean and the variance or standard deviation O. You must know the population variance or standard deviation O d. The t statistic does not require any information about the population

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A: If a researcher is using a related-samples t statistic to test a null hypothesis about a population,…

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A: A large sample size and a small population standard deviation

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A: We want to tell you which one is the correct choicec

Q: In an upper lail test aboul the population mean, where the population standard deviation is known, a…

A: Population standard deviation is known So we will use z

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A: Given : An analyst believes that the average SAT scores for women exceed the average SAT scores for…

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Q: how will you formulate the appropriate null and alternative hypotheses on a population mean.

A: 2) How will you formulate the appropriate null and alternative hypotheses on a population mean. Null…

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A: Given sample size n1=15, sample mean x̄1=31500, s1=sample standard deviations=7900  sample size…

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A: At 85% confidence level, the z value is 1.44 which can be obtained by using the standard normal…

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A: We have given that,  x̄1= 90, s1= 5, n1=12 and x̄2 = 88, s2 = 6, n2 = 16 Then,  We will find the…

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A: Given:A personnel director in a particular state claims that the mean annual income is greater in…

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Q: In order to test the difference in populations means, samples were collected for two independent…

A: Pooled standard deviation:

Q: If the population standard deviation is unknown, what test statistic is to be used? a. t-test b.…

A: If the population standard deviation sigma  is known then z statistic is used.

Q: 1. If the standard deviation is known and n = 55, what test statistic is 3. Which of the following…

A: According to the given information in this question  Here there are five questions according to…

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A: Given information: μ=4.16, σ=2.23, n=52s=1.98, α=0.10

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A: Given : Variance , s2 = 7.3

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A: Solution:  Given information: n= 45 Sample size  x= 323    Sample mean μ= 318   Population mean σ2=…

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A: Introduction: Denote μ1, μ2 as the true population mean nicotine content in the tobacco samples sent…

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Q: 1. When conducting a hypothesis test for the population mean, you will not know the population…

A: The process will remain unchanged but the distribution. As,  you know the sample standard deviation.…

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Q: The sample standard deviation of the dataset 2, aa, 12, 18, and 30 is 10.8 (correct upto one decimal…

A: Sample variance is not affected by change of origin in the data, as can be seen follows:

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