In a leg ulcer trial, time to complete ulcer healing (weeks) between intervention and control groups were measured and compared. The researcher wishes to know if there is any difference between the average time taken for complete healing for both groups. P-value computed for Kolmogorov-Smirnov test is less than α = 0.05. Which type of statistical test should the researcher use?  1. Kruskal Wallis test 2. Mann-Whitney U test 3. Independent T-test 4. One-way ANOVA

Q: For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each…

A: It is given that the number of treatments, K is 3.Therefore, numerator degrees of freedom, df1 = K –…

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: n building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with a…

A: Provided data is, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with a…

Q: Is there a significant difference between the average height of males born in the two different…

A: Solution :  Given : n1 = 100          x1¯   = 63.8           σ1 = 2.58              n2 = 120…

Q: study comparing two treatments with n = 4 participants produces MD = 2 and SS = 75 for the…

A: Given: n = 4 MD = 2   SS = 75

Q: A survey is conducted to determine if there is a difference in the proportion of students, parents,…

A: Given info: The chi-square test statistic is 0.19, df=2, and the P-value is greater than any…

Q: repeated-measures study comparing two treatments with n = 4 participants produces MD = 2 and s2 = 25…

A:

Q: 3. For the alpha and observed significance level (p-value) pair, indicate whether the null…

A: 3. The significance level is 0.05, and p-value is 0.001. Decision rule: If p-value≤α, then reject…

Q: a) Find t. (Give your answer correct to two decimal places.)

A: n = 44, Σd = 224, Σd2 = 6268   The mean is given by   The standard deviation is given by

Q: Consider the test of H0: sigma^2 = 19 against H1: sigma^2 > 19. What is the critical value for the…

A: Solution: From the given information, n=19 and α=0.05.

Q: A study of color in tiger beetles is conducted to support the contention that the proportion of…

A:

Q: In building an arena , steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa )…

A: In building an arena , steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa )…

Q: In the ANOVA results table for a 2' experiment, the P-value for the sample F-ratio of interaction AB…

A: Given that in ANOVA result table for a 23 experiment, the p value for the sample F-ratio of…

Q: Before a company decides to purchase a large quantity of a solvent, it would like to see substantive…

A: Determine the hypotheses that are being tested.   The hypotheses are stated below as follows:

Q: The average length of “short hospital stays” for men is slightly longer than that for women, 5.2…

A:

Q: A one sample t test has n = 12. If using a two-tail test (proportion in two tails combined) with an…

A: Sample size n=2.201 Significance level α=0.05 The degrees of freedom n-1=12-1=11

Q: When the P - value is equal to the alpha level, the null hypothesis should be accepted.

A: P-value is the probability value which is derived from test statistic and it is useful to decide…

Q: Two different methods were used to measure the amount of water (mg/mL) in an organic solvent. The…

A: The table shows the amount of water in an organic solvent.

Q: A sample of n = 4 individuals is selected from a population with a mean of μ =40. A treatment is…

A:

Q: Under what circumstances can you use a z-test instead of a t-test to compare a sample against a…

A: t test and z-test are the statistical tests that are used to find if the value of the sample mean is…

Q: In a completely randomized experimental design, three brands of paper towels were tested for their…

A: For the given data Perform Anova single factor

Q: A sample of difference scores from a repeated-measures experiment has a mean of MD = 5 with a…

A: Solution-: Given: MD=5,s2=64,n=4,α=0.05 We want to find  the critical t-value if it is a two-tailed…

Q: Your null hypothesis is μ = 12 and your alternative hypothesis is μ ≠ 12 for a population with…

A: It is given that the mean is 12, n is 15 and the level of significance is 0.01.

Q: In building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with…

A: Some amount of population is called sample. This sample can be large or small. If the value of the…

Q: 24. From the given results above, which test isappropriate to test the significant difference…

A: 24. Independent samples: Two samples are said to be independent of each other when values of one…

Q: Suppose we have the following random samples: Male Female sample size 50 60 sample mean weight (kg)…

A:

Q: Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…

A: c.   Denote p1, p2 as the true population proportions of wildfires caused by human in south and…

Q: A repeated-measures study comparing two treatments with n = 4 participants produces a treatment mean…

A: For the given data  What is the estimated standard error for the sample mean difference?

Q: In a completely randomized experimental design, three brands of paper towels were tested for their…

A: In order to determine whether there is significant difference in the mean absorbency rating of three…

Q: What would be the minimum sample size for an independent samples t-test with a small effect size…

A: Formula for sample size:

Q: a. What is the degree of freedom and critical value for the test (alpha=0.05)?  b. If the…

A: a.   In this case, it is needed to check whether the response is independent of gender.

Q: We found no difference on the reported self-esteem level between female participants (M=5.39, SD =…

A: As per our guidelines, we are allowed to answer first three sub-pats only. Thanks   What was the…

Q: What conditions are necessary in order to use the dependent samples t​-test for the mean of the…

A: Necessary conditions for dependent samples in t-test, and for the difference in the means of two…

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 34 of the…

A: The proportion of subjects treated with Echinacea developed rhinovirus infections is, Thus, the…

Q: By selecting a larger alpha level, a researcher is ______. a. attempting to make it easier to…

A: We have to find the correct answer for....... By selecting a larger alpha level, a researcher is…

Q: The local swim team is considering offering a new semi-private class aimed at entry-level swimmers,…

A: Introduction: According to the given information, the assumed mean from the previous year’s data for…

Q: is it true that the minimum sample size for an independent samples t-test with a medium effect size…

A: medium effect size d = 0.3 Eta squared = 0.05 Alpha = 0.05 Power = 0.8 Beta = 0.2 Standard deviation…

Q: At a .01 significance level with a sample size of 10, find the critical value for the correlation…

A: Givenα=0.01sample size(n)=10

Q: A study looking at the effects of diethylstilbestrol (DES) exposure and breast cancer risk found the…

A: In this problem, we are studying the effects of diethylstilbestrol(DES) exposure and breast cancer…

Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…

A: Given Information: 394 of the 533 randomly selected wildfires looked at in the south were caused by…

Q: When is a post-hoc test used? (Select all that apply.) a. when you decide to do a within-subjects…

A: Post-hoc test :

Q: For the test of the null hypothesis Ho: u = 17.5 against the two-sided alternative H,:µ # 17.5, a…

A: Given,H0:μ=17.5H1:μ≠17.5Test statistic (Z0)=1.68and the given test is two tailed test.

Q: their improvement scores on a diagnostic test are compared to a control sample of 13 patients who…

A: Given Data : For Sample 1 x̄1 = 50.9 s1 = 12.0 n1 = 16 For Sample 2…

Q: Justify the choice of test procedure. b) Can a student's t-test on paired samples be used as a test…

A: Test is that whether the quality of life of patients before and after the treatment is same. Given…

Q: For an ANOVA comparing three treatment conditions, what is stated by alternate hypothesis (H1)? a.…

A:

Q: The manufacturer of a new model car (Camry) claims that a typical car gets 26 miles per gallon. A…

A: Introduction: Denote μ as the true population mean mileage, which is claimed to be, μ0 = 26 mpg. The…

Q: An engineer has designed a valve that will regulate water pressure on an automobile engine. The…

A: Null hypothesis:µ=7.8.Alternative hypothesis:µ<7.8.Here, the sample mean, x-bar is 7.7.Population…

Q: A repeated-measures ANOVA was calculated with df = 1, 14. If the same data were analyzed with a…

A: here degree of freedom = n-2 = 14

Q: A researcher conducts a one-way ANOVA and obtains a p value of .02 (when alpha = .05). What can you…

A:

Q: One of the advantages of a repeated-measures design is that it removes the individual differences…

A: a. For an independent measures study, following data is given: I II III   6 8 10…