10. In a drug trial, patients showed improvement with a p-value of 0.055. Explain the meaning of thep-value in this trial. Would such a result normally be considered to be statistically significant?

Q: Suppose that two post-sixteen students, A and B, both end their studies in the same percentile, but…

A:

Q: What is the conclusion about the t-statistic and the p-value?

A: Decision rule: If p-value ≤ α, then reject the null hypothesis. Otherwise, fail to reject the null…

Q: our sample consists of 43 subjects, with a mean of 36.1 nd standard deviation of 2.56.

A: Given information: μ=36.82n=43x¯=36.1s=2.56

Q: 17) The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest,…

A: Note: Hi there! Thank you for posting the question. As there are several independent questions,…

Q: Please also explain why you determined whether or not the results are statistically significant.…

A: Given information isn1=40n2=40s1=0.50

Q: Could you please help me understand the difference between a z-test and a t-test for in statistics?

A: Both the tests are useful to test the significance of means.Both the tests are assume a normal…

Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?

A: We need to use the concept of variance.

Q: A researcher suspects that the actual prevalence of depression among children and adolescents is…

A: Given that, A researcher suspects that the actual prevalence of depression among children and…

Q: A sample of size 5 will be drawn from a normal population with mean 61 and standard deviation 13.

A:

Q: If a treatment is expected to decrease scores on a variable for which the mean is expected to be…

A: Given: μ=50 If a treatment is expected to decrease scores on a variable, then the appropriate…

Q: Two samples, each with n =5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given: Let the pooled variance be sp2 n1=n2=5   Let the standard error be SE Formula for Standard…

Q: In an April 2009 study, it was reported that undergraduate students have a mean credit card balance…

A: A hypothesis which is tested for plausible rejection is called the Null Hypothesis (typically…

Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: 5. If you want to be 85% confident of estimating the population mean sampling error of +5 and the…

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

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.11 and a…

A: Given that the shoe sizes of American women have a bell-shaped distribution with a mean of 8.11 and…

Q: Suppose the number of Covax and Pfizer vaccine bought by the Philippine government are normally…

A: Let, X=the number of vaccine μ =mean σ = sd

Q: A clinical psychologist is interested in testing whether serial killers are more introverted than…

A: a. The claim of the test is that the population mean introversion score is significantly different…

Q: A researcher conducted a research that majority of people who died during pandemic bought a new…

A: Given: Research that majority of people who died during pandemic

Q: What mathematical operations could I do to every score in my distribution list that would have no…

A: Mathematical operation  Adding/subtracting

Q: What does it mean when the difference is statistically significant?

A: STATISTICALLY SIGNIFICANT MEANS NULL HYPOTHESIIS IS REJECYED.

Q: If a P-value is .043, what does that mean in terms of the value obtained for the test statistic?

A: p-value is the probability of obtaining more extreme results under  null hypothesis, by more extreme…

Q: You are doing a right-tailed hypothesis test for the mean and have to approximate the standard…

A: It is given that the test is right-tailed. Level of significance is 0.01 Degrees of freedom is 39-1=…

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation…

A: Given, Mean, mu= 104 Standard deviation, sigma= 17 We know that,  Z score= (X-mu)/sigma

Q: Does the data from the sample support his claim at a significance level of 0.05?

A: It is given that Sample size n = 60 Sample mean M = 3012 Sample SD s = 112 Level of significance =…

Q: Find the raw score of a standard score of z= -1.25 in a normally distributed population with mean 25…

A: given data Z score =-1.25 Mean = 25 standard deviation = 5

Q: what is a statistical model

A: A statistical model is process of applying statistical analysis to the given data set and it…

Q: What is the probability that the amount of collagen is greater than 74 grams per mililiter? swer: O…

A: Let X denote the amount of collagen. Given that X follows N(mean = 76, SD = 8), then Z = (X -…

Q: 4. A test prep company claims to help students gain 12 points in their math exams between the time…

A:

Q: An article in the San Jose Mercury Newsstated that students in the California state university…

A:

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation…

A:

Q: Suppose that IQ scores have a bell shape distribution with a mean of 105 and a standard deviation at…

A: Solution: Let X represent the IQ scores of students.  The distribution of X is bell shape…

Q: If a treatment is expected to decrease scores on a variable for which the mean is expecte

A: From the given information, If a treatment is expected to decrease scores on a variable. The mean is…

Q: The mean score on the exit examination for an urban high school is 66with a standard deviation of…

A: Given  μ=66, σ=6, n=9  We want to find the sample mean(x̄)

Q: 5. What conclusions can you draw from the data gathered from one small bag compared to several small…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 103 and a standard deviation…

A:

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

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Q: How do you tell if a ANOVA is significant given the F value, p value, and eta squared? What does the…

A: In ANOVA, the null hypothesis is that there is no difference between group methods. If any group…

Q: A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a mean…

A: Given: n = 29 x¯ = 597.9 s = 3.8 α = 0.01

Q: 2) A researcher suspects that there is a relationship between substance use and sexual activity…

A: In statistics, for analysis purposes, we collect the data. According to the objective of the survey…

Q: 1. A researcher suspects that the actual prevalence of depression among children and adolescents is…

A: Note:If the critical value is 1.645 instead of 1.96 in option A, then that will be the correct…

Q: 3. If instead we use a 1% significant level, the results v [ Select ] statistically significant. are…

A: As per instruction, we are asked to solve part 3 only Given Data :

Q: Suppose that you want to do statistical significance tests for four correlations and you want your…

A: It is given that the number of correlation is 4 and EWa is 0.05.

Q: What is the best thing to do when the result failed to meet statistical significance but had a…

A: Statistical significance of a result: It is used in the testing of hypotheses. To determine whether…

Q: Suppose the number of Covax and Pfizer vaccine bought by the Philippine government are normally…

A: Let, X=the number of vaccine μ =mean σ = sd

Q: 3. The time to read a statistics exam is normally distributed X = 7 minutes Standard deviation = 2.5…

A: Answer - The time to read a statistics exam is normally distributed               x = 7 minutes…

Q: 2. If the scores on an aptitude test are normally distributed with mean 500 and standard deviation…

A:

Q: A study shows that Michigan teachers have measures of job dissatisfaction that are normally…

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Q: So far, Walter has scores of 18, 17, 19, and 21 points for the first four science quizzes. What does…

A: Walter scores of first four science quizzes is 18, 17, 19 and 21 points.

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given Datan1 = n2 = 5pooled variance = 40Estimated standard error is given by

Q: 2 Consider the normal distribution of IQs with mean of 100 and a standard deviation of 16. What…

A: Note: As per our guidelines we are answering only one question (or) 3 subparts and the rest can be…