A researcher conducts a repeated-measures study to evaluate the efficacy of therapy in decreasing maladaptive behavior. The researcher examines maladaptive behavior before and after therapy with a sample of n = 6 participants and obtains a sample mean difference of MD = 6 with an estimated standard error of sMD = 3.00. Which of the following is the correct decision for a one-tailed hypothesis test in which therapy is expected to reduce maladaptive behavior? a. reject the null hypothesis with α = .05 but not with α = .01 b. reject the null hypothesis with both α = .05 and α = .01 c. fail to reject the null hypothesis with both α = .05 and α = .01 d. fail to reject the null hypothesis with α = .05 but not with α = .01

Q: An independent measures research study with n=5 participants in each treatment produces sample…

A: The difference of the means is 2.

Q: following data were obtained from a two-factor independent-measures experiment with  n = 5…

A:

Q: You have an independent-measures study where your sample size for both treatment groups is n = 9.…

A: Given, SS1=546, n1=n2=9, SS2=606M1=80, M2=72 Pooled Variance=SP2=SS1+SS2n1+n2-2=546+6069+9-2=72

Q: When comparing more than two treatment means, why should you use an analysis of variance instead of…

A: The Independent-Samples T Test procedure compares means for two groups of cases.It determines…

Q: What is the test statistic for this sample? (Report answer accurate to three decimal places.) test…

A: Given that Sample size n = 380 Number of success, X = 215 Level of significance = 0.002

Q: Recall that small effects may be statistically significant if the samples are large. A study of…

A: Sample sizes n1=104 , n2=46 Favorable cases x1=13 , x2=8 NOTE:- According to bartleby guidelines…

Q: Test the claim that the proportion of men who own cats is significantly different than the…

A:

Q: The following data were obtained to examine the effects of anxiety levels (low and high) and 3…

A: Given information: The investigator is specially interested to examine the effects of 2 anxiety…

Q: A randomized double-blind clinical trial for a new drug has a null hypothesis of "There is no…

A: A randomized double-blind clinical trial is done.

Q: Russell says he is willing to accept a 5% chance of making a Type I error in this study. What is the…

A: Russell says he is willing to accept a 5% chance of making a Type I error in this study. so…

Q: Test the claim that the proportion of men who own cats is smaller than 20% at the .01 significance…

A: Givenclaim is that the proportion of men who own cats is smaller than 20%significance…

Q: Which of the following can introduce a fatal flaw to a randomized controlled study? OA.…

A: A) Pre-specified outcomes: Having pre-specified outcomes is actually a recommended practice in a…

Q: as clinically depressed. The results (displayed as SPSS output – a statistical software package) are…

A: Paired sample t test  Paired sample t test is an exact test used for testing the significant…

Q: When comparing more than two treatment means, should you use an analysis of variance rather than…

A:

Q: What can conclude about the null hypothesis from this dataset of weight gain in mice grouped by…

A: The given data can be written in the form of a two-way table as follows   Diet   Stress A B C…

Q: sis would be:   H0:pM=pF H1:pM≠pF   H0:pM=pF H1:pM>pF    H0:μM=μF

A: As given , Based on a sample of 20 men, 30% owned catsBased on a sample of 60 women, 55% owned cats…

Q: Test the claim that the proportion of men who own cats is larger than 35% at the .05 significance…

A: Given, Sample size = 20 Sample proportion = 0.30   Under the claim, the null and alternative…

Q: Test the claim that the mean GPA of night students is significantly different than 2.2 at the U.02…

A:

Q: a. Calculate and interpret the t-statistic for “pcol”.   b. Write down Stata’s default null and…

A: 3. a. value of t-statistic is calculated by, b1SE,where b1=coeffiecient of pcol…

Q: Q2: Placebo effect of exercise Imagine that Crum and Langer were able to repeat their study from Q1…

A: From the given information, the experiment has three groups: the Full treatment group, the Half…

Q: An experiment was conducted to test if the presence of a witness (no witness, mirror, adult present)…

A: Solution The researcher wants to test if the presence of a witness (no witness, mirror, adult…

Q: A drug manufacturer claims that fewer than 10% of its patients experience nausea. A significance…

A: In the context of hypothesis testing, two types of errors can occur: Type I and Type II errors.…

Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A:

Q: An industrial/organizational psychologist has been consulting with a company that runs weekend…

A: 1) Given that: n=36x¯=7.3s=1.5μ=6.1 Cohen's d is calculated as: Cohen's d=x¯-μs=7.3-6.11.5=0.8 The…

Q: The data below are from a study comparing three different treatment conditions: Treatment 1…

A: Test Hypotheses: There are 3 groups of treatments. Denote the true average scores of the three…

Q: Test the claim that the proportion of men who own cats is significantly different than 60% at the…

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: To investigate the impact of texting while driving on road traffic accidents (RTA), two groups of…

A: Solution. Given to  investigate the impact of texting while driving on road traffic accidents (RTA),…

Q: null and alternative hypothesis would be

A: Here , we want to test the claim that the proportion of men who own cats is significantly different…

Q: Test the claim that the proportion of people who own cats is significantly different than 80% at the…

A: Here, the claim is that the proportion of people who own cats is significantly different than…

Q: A study was undertaken with 24 randomly selected male subjects who were to undergo such surgery. The…

A: It is required to identify the correct alternative hypothesis, based on the given null hypothesis…

Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A:

Q: ou are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A:

Q: For an ANOVA comparing three treatment conditions, what is stated by the null hypothesis (HO)?…

A: The given information is about an ANOVA comparing three treatment conditions.

Q: est the claim that the proportion of men who own cats is significantly different than the proportion…

A: Given, Sample- 1 (For men) n1 = 40 p^1=x1n1=0.4 Sample- 2 (For women) n2 = 60 p^2=x2n2=0.45

Q: A nutrition expert claims that the average American is overweight: To test his claim, a random…

A: A. Consider μ is the population average difference of actual weight and ideal weight.

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: You are conducting a study to see if the probability of catching the flu this year is significantly…

A: H0:p=0.89H1:p≠0.89α = 0.005n = 213x = 204

Q: cantly different from 0.25. You use a significance level of α=0.01α=0.01.       H0:p=0.25H0:p=0.25…

A: The test is a two-tailed test, as the alternative hypothesis includes not equal to sign.   The…

Q: Researchers investigate how the presence of cell phones influence the quality of human interaction.…

A: Given information: Researchers are interested to study the effect of the cell phones quality of…