What is a post hoc test and why don’t you need it if your ANOVA is not significant

Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

A: Claim; μ>136mm                x=148                s=15

Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

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Q: This is rejecting Ho when it is true. If the alternative hypothesis says not equal to we know are…

A: We have to match the given definitions with the given terms.

Q: A distribution of sample means with scores of 35 were taken from a skewed population. The…

A: According to central limit theorem, for large sample (>30) or if the population follows normal…

Q: Alyssa and Alan medical group found that the mean annual earning of the pharmacist in the US are…

A: Given information : mean  x1 = 230000x2 = 225000 Sample size n1 = 300n2 = 400 Standard deviation σ1…

Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

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Q: What is a type 1 and type 2 error? How are they related to each other?

A: First of all, we know that there are two types of arises in the testing of hypothesis because, in…

Q: On average, Americans have lived in 3 places by the time they are 18 years old. Is this average a…

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

Q: can you briefly help me explained what happened in this Theorem? I already know that the…

A: Given information: T is set of 20 means calculated from finding samples of size 20 from the larger…

Q: A population of scores has a mean = 26, a median = 23, and a mode =22.  What is the most likely…

A: Given: Mean = 26 Median = 23 Mode = 22

Q: Previous research has shown that the mean number of ballpoint pens Americans use per year is 4.3…

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Q: On average, Americans have lived in 3 places by the time they are 18 years old. Is this average more…

A: As per guideline expert have to answer first three subpart only since I had done more for you please…

Q: A research company wants to estimate the mean IQ score for the population of all high school…

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Q: medical researcher wants to compare the pulse rates of smokers and non-smokers.  He believes that…

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Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

A: We want to find conclusion

Q: Is your index finger longer than your ring finger? Or is it the other way around? It isn't the same…

A: The hypothesis is, Null hypothesis: H0: There is no association between gender and relative finger…

Q: Does buttered toast fall face down? Data was collected to test this. 40 slices of toast (each with…

A: Given data number of success , x= 24.0 sample size, n = 40 population…

Q: please explain in detail in your own words  Why ANOVA is known as the extension of T test. what is…

A: One way analysis of variance (ANOVA) is a technique that can be used to compare two or more…

Q: Professor Tom knows that the mean score on the midterm exam from all the years he has been teaching…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: How do you find z-score with only a standard deviation and the simple mean? They aren't providing…

A: Let us assume we have a population which is normally distributed with mean µ and standard deviation…

Q: In a statistical test, we have a choice of a left-tailed test, a right-tailed test, or a two-tailed…

A: In hypothesis testing, the claim of the study is stated in alternative hypothesis. In other words,…

Q: Suppose the null hypothesis is not rejected. State the conclusion based on the results of the test.…

A: Test is that whether the mean proce has increased.

Q: A psychologist is studying smokers' self-images, which she measures using the self-image (SI) score…

A: Since you have posted a question with multiple sub parts, according to our guidelines we can solve…

Q: A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that…

A: Given, A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes…

Q: test statistic z=−3.03, find the p-value to 4 decimal place

A: We have given that  The left-tailed test with z-statistic z = -3.03

Q: The average student studies eight hours for a statistics exam and receives a grade of 84. In a…

A: Given that, Claim: Test the hypothesis that the studying twelve hours statistically significantly…

Q: Your medical research team is investigating the mean cost of a 30-day supply of a certain heart…

A: The claim The mean cost is less than $100

Q: time reports that the time married men with children spend on child care averages 6.4 hours per…

A: (1) State the hypotheses. That is, there is no evidence to conclude that the population mean number…

Q: How is censored cases handled in the KM estimator? Let's consider the median survival time in…

A: Survival Analysis: The name of the variable containing the time to reach the event of interest or…

Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

A: We want conclude the results

Q: The XYZ company wants to evaluate whether it discriminates against men or women in its merit pay…

A: It is given that the XYZ company wants to evaluate whether it discriminates against men or women in…

Q: Compute the value of the test statistic

A: For population 1, sample size n1 = 6, sample mean = 3.8 and sample SD = 0.2 For population 2, sample…

Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

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Q: In a study to test if the mean score is less than an average of 75, the null hypothesis that the…

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Q: "A student knows the average person takes 15 minutes to fall asleep, and wanted to compare this time…

A: (21)

Q: a group of mathematics teachers wants to estimate the average computational skills of the students…

A: From the provided information, Population standard deviation (σ) = 5 Confidence level = 95% Margin…

Q: What is the probability that the poll gets a sample in which fewer than 32.5% say the level of…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: Previous research has shown that the mean number of ballpoint pens Americans use per year is 4.3…

A: Given that  Sample size n =20 Population mean =4.3 Population standard deviation =1.17 Sample mean…

Q: Professor Nord stated that the mean score on the final exam from all the years he has been teaching…

A: From the provided information, Professor Nord stated that the mean score on the final exam from all…

Q: How is a z-score obtained? What is the interpretation of a z-score? An observation has a z-score of…

A: We have to give formula and interpretation of z score.

Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

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Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

A: Given : Claim : Gary conclude that his mean time for painting a medium-sized room without using the…

Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

A: Given : Claim : Gary conclude that his meantime for painting a medium-sized room without using the…

Q: IQ tests are approximately normally distributed with a mean of 100 for adults. A tech company CEO…

A: Solution: Here, the hypothesis test is to be conducted if the average IQ of employees at high-tech…

Q: Professor Nord stated that the mean score on the final exam from all the years he has been teaching…

A: The mean score on the final exam from all the years he has been teaching is a 79%  His class’s mean…

Q: A placement test for the state university freshmen has a normal distribution with a mean of 700 and…

A: Let X  be the test score. It is given that , a placement test for the state university freshmen has…

Q: Now suppose that the true mean exposure time is different from 8h/day, yet the sample mean falls in…

A: Type I error: The type I error if the null hypothesis is rejected when it is actually true. Type II…

Q: Your friend told you that sample median is an unbiased estimator. You argue with him that it can…

A: Median is a measure of central tendency.

Q: Gary has discovered a new painting tool to help him in his work. If he can prove to himself that the…

A: