Which value do these results indicate is the best estimate of the increased breast cancer risk associated with DES? Does the p-value indicate a high or low degree of compatibility of these data with the null hypothesis?

Q: ______________________________________ were designed to be used after a significant ANOVA where the…

A: ANOVA test tells us  whether  we have an overall difference between your groups, but it doesn't tell…

Q: When looking to understand the Z score what does it actually mean in simple terms in comparison to…

A: The value of the z-score tells you how many standard deviations you are away from the mean. If a…

Q: What is the conclusion for this test? The P-value is the significance level a, so the null…

A: Given Z =9.13, pvalue=0.000

Q: Two separate samples are being used to estimate the population mean difference between two treatment…

A: Given : sample sizes and pooled variances we know, Margin of error, E = tα2 ,df×sp2×1n1+1n2 α = 0.05…

Q: Using a 5% level of significance and a sample size of 24, what is the critical t-value for a null…

A: Given: Using a 5% level of significance and a sample size of 24, what is the critical t-value for a…

Q: Why does a large value of the F statistics provide evidence against the null hypothesis?

A: We use F-statistic (F ratio) when we are comparing the group means like ANOVA test for for more than…

Q: Does St. John wort (an herb) have a siginifact effect in treating major depression? A study looked…

A: C.The placebo makes no difference in the subjects' depression

Q: What would your decision be on this hypothesis test if we use a level of significance for the test…

A: Here given cereal is claimed to have an average of 3 grams of dietary fiber per serving  Here test…

Q: Select a significance level α and reject the null-hypothesis if the p-value is less than α. Explain,…

A: Correlation: The correlation coefficient explains the relationship between two quantitative…

Q: Use a 0.05 significance level to test the claim that the two samples are from populations with the…

A: n1 =35n2 = 40 x1 = 19.4x2 = 15.1s1 = 1.4s2 = 0.8

Q: The alternative hypothesis for an ANOVA states that

A: ANOVA: In one factor ANOVA model only one factor is studied, that is only the effect on one factor…

Q: Using the p-value method, we reject the null hypothesis if the p-value is ___________than or equal…

A: NOTE When p-value≤α=level of significance, then we reject the null hypothesis. When…

Q: Is there enough evidence, at a a = 0.01 level of significance, to show a difference between the…

A: The provided sample means are shown below: Xˉ1=578\bar X_1 = 578 Xˉ2=570\bar X_2 = 570 Also, the…

Q: Researchers are trying to determine if the prevalence of CVD is different in smokers compared to…

A: Here compare provenance of CVD BETWEEN non smoker and smokers

Q: Should post-hoc tests

A: 1a) A post hoc test is then used only if H0 (the null hypothesis) is rejected to determine which…

Q: An independent-measures research study uses a total of 40 participants to compare two treatment…

A: Given  Total participants =40

Q: For a one-way ANOVA test, suppose that, in reality, the null hypothesis is false. Does that mean…

A: ANOVA: Hypotheses: H0: µ1 = µ2 = µ3 =…= µk. H1: At least one of the µ’s different.

Q: Explain why the null hypothesis should not be accepted when the effect is not significant?

A:

Q: Smaller p-values indicate more evidence in support of:

A:

Q: What does rejecting the null hypothesis and statistically significant both signify?

A: The key assumption of a hypotheses test is that the null hypothesis is true. The aim of the…

Q: In the context of a Two Factor ANOVA, should you proceed to an analysis of the main effects? Justify…

A: Given : We have analysis of variance table  Source of variation  Sum of square  degrees of…

Q: If the null hypothesis is rejected for a One-Way ANOVA, then what test should you conduct?

A: If the null hypothesis is rejected for a One-Way ANOVA, then it means that the means of all groups…

Q: What would be the minimum sample size should I generate to be able to detect a linear correlation…

A:

Q: What is indicated by a large variance for a sample of difference scores in the context of a…

A: Given: Large variance for a sample of difference scores in the context of a repeated-measures…

Q: sed on a two-tailed t-test,what will be the conclusion of the significance test for this correlation…

A: From there results of first question, the correlation value is 0.97.

Q: smaller p-value means there is lesser evidence in favor of the alterative hypothesis?  True or…

A: We have to identify statement is true or false.  a smaller p-value means there is lesser evidence in…

Q: The value for the test statistic for a left-tailed one mean z-test is z= -1.19. Determine the…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: What is the null hypothesis of a one-tailed repeated-measures research study if a treatment is…

A: Answer:-  Here, null hypothesis is there is no increase in scores after the treatment.  Null…

Q: A paper investigated the driving behavior of teenagers by observing their vehicles as they left a…

A: Given: n1 = n2 = 10 α = 0.1 Formula Used: Test-statistic t = X1-X2sp1n1+1n2 sp =…

Q: If we have a sample of size 100 with sample mean breaking strength of 975 pounds from a population…

A: Solution: Let X be the breaking strength. From the given information, x-bar = 975 pounds, S=200…

Q: Justify when and why we should use the Kolmogorov-Smirnov test to statistically analyze data in…

A: Please find the explanation below. Thank you

Q: A t-test would reject the null hypothesis at a 0.05 significance level. True or False?

A: Note: Hey there! Thank you for the question. As you have specifically asked for the decision…

Q: What is the relationship between the t-test and the sample size? (

A: Here identifying the relationship between t test and sample size

Q: If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?

A: ANNOVA is a statistical technique that assesses potential differences in a scale-level dependent…

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: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: We want to test the hypothesis

Q: What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.12 : Does…

A: Given information : Sample mean for manufactures A , x̅A = 142 Sample mean for manufactures B , x̅B…

Q: What is the difference between a null hypothesis and a research hypothesis?

A: Null hypothesis:Null hypothesis is a statement which is tested for statistical significance in the…

Q: When three groups were compared using the one-way Analysis of Variance (ANOVA), the result turned…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Based on the data and results of test for normality in the table, complete the parts of hypothesis…

A:

Q: If the decision is to reject the null hypothesis of no difference between twa population proportions…

A: Given that  Null hypothesis (H0) : No difference between two population proportions. Here, In null…

Q: A small pilot study is run to compare a new drug for chronic pain to one that is currently…

A: Null Hypothesis:    H0:  There is no difference in the self-reported improvement in pain.…

Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…

A: Given that,sample one, x1 =434, n1 =685, p1= x1/n1=0.6336sample two, x2 =468, n2 =687, p2=…

Q: If difference scores begin to pile up away from a sample mean difference score of MD = 0, which of…

A: The null hypothesis will likely be rejected.

Q: A large p-value indicates that the data is consistent with the alternative hypothesis.   True or…

A: The p-value is the likelihood of obtaining the value of sample statistic which would be as extreme…

Q: How does increasing the alpha/significance level increase the power of a statistical test?

A: Type 1 error is the error of rejecting a true null hypothesis. This happens when the value of the…