Under what circumstances are post hoc tests necessary? * accept the null hypothesis with k > 2 O reject the null hypothesis with k > 2 O reject the null hypothesis with k 2 accept null hypothesis with k = 2 Reading this statement: "For k/N-k, i.e., 5/50-5 df, the critical value at a.05a is 4.04." How many treatment conditions were compared in the study? O 5 O 50 O 45 4.04

Q: Assume that a simple random sample has been selected from a normally distributed population and test…

A:

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A: A.   Consider that σ is the standard deviation for the height of the baseball players. Here, the…

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A: The question is based on a hypo. testing of a difference between two popl. Given : n1 = 22, n2 = 12…

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A:

Q: If the alternate hypothesis were modified in this problem to be a two-sided test using a not equal…

A: Given Z=2.24

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A:

Q: Test the claim about the population mean u at the level of significance a. Assume the population is…

A: Denote μ as the population mean.

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A: Given data is 784,660,1250,633,591,558sample size(n)=6

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A: Given: ∝ = 0.05. k = 5 From the provided data we have the computations as, Category Observed…

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A: From the provided information, The sample size (n) = 33 Sample variance (s2) = 29.2

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A:

Q: How many standard errors away from the hypothesized healthy population mean of BMI=15 would the…

A: here from given information  sample mean  = 14.5785 sample standard deviation  = 2.25 alpha = 0.01…

Q: A simple random sample of size n=200 drivers were asked if they drive a car manufactured in a…

A: Given: α=0.05n=200x=108p=0.5

Q: Use technology to find the P-value for the hypothesis test described below The claim is that for 12…

A: The sample size n is 9.

Q: You conducted a one-sample z-test, obtaining a value of 4.6 for the z value. What is your…

A: The probability value for z-score 4.6 is close to 0. For any significance level, the p-value is less…

Q: Suppose a researcher is testing the hypothesis Hn: p=0.6 versus H,: p<0.6 and she finds the P-value…

A: The random variable X follows normal distribution. We have to test whether the population proportion…

Q: Suppose there is a claim that a certain population has a mean, μ, that is different than 6. You want…

A: given data, claim :μ≠6α=0.05hypothesis:H0:μ=6H1:μ≠6critical value:±1.960test statistics:-2.615

Q: A two-tailed hypothesis t-test was performed with a sample size of 20, and a t-test statistic was…

A:

Q: Comparing scales: In an experiment to determine whether there is a systematic difference between the…

A: Solution

Q: Two different simple random samples are drawn from two different populations. The first sample…

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Q: A sample of n=24 is selected from a population = 120 and σ = 40.  If the sample mean is 130, what is…

A: It is given that the population mean, μ=120 and standard deviation, σ=40. For the sample size of 24,…

Q: How will we know when we've made a type I error?

A: A type I error occurs when we reject the null hypothesis, but it is actually true.  A null…

Q: You are conducting a multinomial hypothesis test (a = 0.05) for the claim that all 5 categories are…

A:

Q: Fertilizer: A new type of fertilizer is being tested on a plot of land in an orange grove. The mean…

A: From the provided information, The mean number of pounds of fruit on this plot of land with the old…

Q: A random sample of size 11 is taken from a normal distribution with unknown mean and unknown…

A: Correct answer is (a).  1.81   Reason:

Q: endent populations have unknown but equal variances. We randomly select 32 items from each of…

A: Solution

Q: The one-sample t‑statistic for a test of H0:μ=42 versus H1:μ<42 based on n=15 observations has the…

A: We have given a one-sample t-test with the hypothesis for the test:Test statistic: Sample size:

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Q: When we consider a random sample of size n as X,,., X, which is from Binomial (n, 6). X+1 a. Is -…

A: We have given :

Q: In testing the hypotheses H :л>0.40, at 5 % level of H:л=0.40, significance. if the sample…

A: It is given that, The sample size is 49. The sample proportion is 0.45. We have to find which of the…

Q: H. Which is the correct hypothesis to test this claim?

A:

Q: In a random sample of 250 ​items, 75 are defective. If the null hypothesis is that 24% of the items…

A: We have given thatn = 250x = 75p̂ = x/n = 75/250 =  0.30p = 24% = 0.24

Q: An automobile assembly line operation has a scheduled mean completion time, µ, of 14.4 minutes. The…

A: Given: μ=14.4 &amp; σ = 1.2         Sample size, n = 24         The sample mean, M = 13.8        To…

Q: The mean age of professors at a university is 45.8 years. If a hypothesis test is performed, how…

A: claim : μ = 45.8 we perform hypothesis test and  decision : fail to reject the null hypothesis. we…

Q: K A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2883…

A: not wearing seat belt  : n1 = 2883x1  = 28wearing seat belt : n2  =7870x2 =17α = 0.05claim : p1 &gt;…

Q: Using a significance level alpha o.05, determine whether the number of years of college a person has…

A:

Q: In a random sample of 400 ​items, 70 are defective. If the null hypothesis is that 21% of the items…

A: Sample size is n=400 Number of defectives is x=70. The null hypothesis states 21% of the items in…

Q: Let n1 =80, X1 = 10, n2=80, and x2= 20. Complete parts (a) and (b)below. A.At the 0.10 level of…

A: Given Information: First sample: Sample size n1=80 Number of successes x1=10 Second sample: Sample…

Q: Chemistry Final Exam 14 12 10 8. 6. 4. 2 54.5 64.5 74.5 84.5 94.5 SCORES Only 3 students scored…

A: The following information can be extracted from the graph Scores Frequency 54.5 6 64.5 8…

Q: random sample of 156 recent donations at a certain blood bank reveals that 87 were type A blood.…

A:

Q: In one common system for finding a grade-point average, or GPA, A= 4, B = 3, C = 2, D = 1, F = 0.…

A: Grade point  A=4, B=3, C=2, D=1,F=0

Q: study of the accuracy of fast food drive-through orders, one restaurant had 40 orders that were not…

A: Sample size n =335 Favorable cases x =40 Sample proportion p^=x/n  =40/335 =0.1194

Q: The mean age of principals in a local school district is 52.5 years. If a hypothesis test is…

A: claim : μ = 52.5 we have to interprete decision : reject the null hypothesis.

Q: QUESTION 13 What do you do, if the p-value in your hypothesis test is equal to 0.0002? O The…

A: Given that  P-value = 0.0002

Q: simple random sample of size 200 drivers were asked if they drive a car manufactured in a certain…

A: Given data, Sample size, n =  200 Mean, x = 106 Population proportion, p = 0.50 Significance level,…

Q: What is the critical value of z? 2.58 1.96 1.65 2.33 What is the value of the test statistic, z,…

A: Let X be the number of favorable cases. The sample proportion is 0.6260 The sample size is 1177 The…

Q: Item5     Time Remaining 56 minutes 33 seconds 00:56:33   eBook Item 5   Time Remaining 56 minutes…

A: We have given that  Sample size n=4  The null and alternate hypotheses are:H0 : μd ≤ 0H1 : μd &gt; 0…