If about 75% of the students of a certain university are expected to use a laptop for online classes, what should be the sample size for a 99% confidence level and a 5% precision level? (A) 365 students B 498 students 522 students 634 students

Q: If you think a data point is an outlier, what test can you perform to see if you should omit the…

A: An outlier in a data set is a value that is significantly large or small compared to the other…

Q: he critical values for a (two sided) hypothesis test at the 95% level are: Group of answer choices…

A: the critical value for a 95 % level =?two sided hypothesis test α=1-0.95=0.05critical value  for the…

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A: Given ,confidence interval (C.I)=(7.1 , 7.5)

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A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

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A:

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Q: Illustrates the effect of  significance level on the power of a two-sample t test?

A: Power of a hypothesis test: The probability of not committing a Type II error is called the power of…

Q: What is the role of the sample size in the determination of confidence interval? Explain.

A: Let us first define sample size and confidence interval. Sample size: It is determination of the…

Q: 25.  At a local college, 200 students were asked if they attended orientation. 112 said that they…

A:

Q: What is the formula for the 95% confidence interval for a population mean, given a sample mean and…

A: Given that 95% confidence interval for populations mean.

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A: In question, Given A new treatment for a certain disease is claimed to be effective in more than 80…

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A:

Q: How do I calculate a 95% confidence level for a sample proportion in excel? Meaning, what formula…

A: Given : Confidence level = CL = 95% = 0.95

Q: What would the p-value be for a sample if the test statistic is 0.968 and the significance level is…

A: Given data: Test statistics = 0.968 The test is assumed to be right tailed test. Significance level…

Q: Suppose we want to test whether there is a difference between the room rates of luxury hotels in New…

A: It is given that 20 random luxury hotels in new York and 30 random luxury hotels in L.A.

Q: The university and the Team Up North both claims to have the highest attendance in the Big Fourteen…

A: Given n1=n2=31 S1=1242 S2=2258 X1-bar=105965 X1-bar=104291

Q: Suppose the metroparks want to survey local residents about how they feel about the park system.…

A: Given,margin of error(E)=0.0475Assume sample proportion (p^)=0.5α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given, n=119, x=31, α=0.05 Then, p^=31119=0.260504

Q: A recent year was randomly picked from 1985 to the present. In that year, there were 2.051 Hispanic…

A:

Q: What test should be used in the following study? (options are uploaded in images). Levels of…

A: Given information: The investigator is specially interested to test whether there is any difference…

Q: 1000 randomly selected Americans were asked if they believed the minimum wage should be raised. 600…

A: Givensample size(n)=1000x=600sample proportion(p^)=xn=6001000=0.6confidence level=95%

Q: Part 1 of 3: You are given the following numbers and want to estimate the population mean. 5.2, 18,…

A: Here, there are 6 observations. That is, n = 6. The sample mean and sample standard deviation are…

Q: My sister and I completed an experiment. she had o guess whether I was looking at her or not. The…

A: Sample size (n)=10Number of success (X)=6We have to find the sample proportion of she correctly…

Q: If subject 101is 71 years old. Divide the age by 10 and put a % on it, that is your desire margin of…

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

Q: abulated below: Males Females American Football more iolent ce hockey more iolent 434 361 466 439

A: The value of z at 99% confidence level is 2.575. (From standard normal table) Given  X =434 n=900…

Q: A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of…

A: n = 21410 p^ = 0.72 99% ci for p

Q: A survey of 225 randomly chosen commuters are asked if they support an expanded public…

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Q: The numbers of incorrect answers on a true-false competency test for a random sample of 5 students…

A: Given data set is1,2,6,5,6sample size(n)=6

Q: If the sample portion is 0.448 What is the margin of error for the 95% Confidencelevel? 0.95 = 1.960…

A: Given that  Sample size n =1000 Favorable cases x =448 Sample proportion p^=x/n  =448/1000 =0.448

Q: 700 randomly selected Americans were asked if they believed the minimum wage should be raised. 350…

A: Given that  p = 700 x = 350 Confidence level(c) = 90% = 0.90 Significance level (α) = 1-c = 1-0.90=…

Q: As quality control inspector, you have previously believed a claim that 3.2% of items made on your…

A: Here you're claim that 3.2% of items made on your production line are defective. The hypotheses…

Q: Describe, in your own words, the difference between a one-tailed and two-tailed test within the…

A: Null hypothesis : Any hypothesis tested for its possible rejection is called a null hypothesis. It…

Q: What is the best estimate for the standard error of the sampling

A: Given data,Tota no of students n=14795Who said yes for cyberbullied is x=2219Point estimate is…

Q: need part  A  result 270 incorrect.

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Q: In a poll of 1000 randomly selected voters in a local election, 414 voters were against school bond…

A: The question is about confidence intervalGiven :Randomly selected no. of voters ( n ) = 1000No. of…

Q: how does increasing the sample size influence the size of the t statistic in a hypothesis test. How…

A: Increasing the sample size decreases the width of confidence intervals because it decreases the…

Q: Does having a non-significant P-value means that the means of the sample will be the same? explain

A: The hypotheses for the means is constructed as: H0: The means of the sample will be the same. H1:…

Q: The percentage of Texans not covered by health care insurance in 2015 was 17%. The Texas Health and…

A: