For a study with a related samples design and 30 participants in which each participant is measured twice (repeated measures), what is the critical value? Assume a two-tailed test with α = .05.
Here degrees of freedom, df = 30 -1 = 29
This is two tailed test, for α = 0.05 and df = 29
Critical value of t are -2.045 and 2.045.
Hence reject H0 if t < -2.045 or t > 2.045
For a study with a related samples design and 30 participants in which each participant is...
10. Advantages and disadvantages of the related-samples design Aa Aa E Disadvantages of using a related sample (either one sample of participants with repeated measures or two matched samples) versus using two independent samples include which of the following? Check all that apply. O A study that uses related samples to compare two drugs (specifically, one sample of participants with repeated measures) can have a carryover and/or order effect such that the effects of the drug taken before the first...
An independent-measures research study uses two samples, each with n = 10 participants. If the data produce at statistic of t = 2.095, which of the following is the correct decision for a two-tailed hypothesis test? Reject the null hypothesis with a = .05 Reject the null hypothesis with a - .01 O Fail to reject the null hypothesis with a - .05 Cannot answer
Question 2 The primary advantage of the related samples design is that it controls for ________ that may artificially increase the observed differences between means in other types of studies. Group of answer choices degrees of freedom MD individual differences the effect of the treatment Question 3 A manager would like to know if the performance of sales representatives significantly (α = .05) improves over the first 6 months of employment. For 5 new sales representatives, the number of sales...
an independent measures research study uses 2 samples, each with n=12 participants. if the data produce a t statistic of t=2.50, then which of the following is the correct decision for a 2 tailed hypothesis test? a. reject the null hypothesis with a=.05 but fail to reject with a=.01 b. reject the null hypothesis with either a=.05 or a=.01 c. fail to reject the null hypothesis with either a = .05 or a=.01 d. cannot answer without additional information
A researcher obtains t = 2.01 for a repeated-measures study using a sample of n = 30 participants. Based on this t value, what is the correct decision for a two-tailed test? A. Fail to reject the null hypothesis with either α = .05 or α = .01 B. Reject the null hypothesis with α = .05 but fail to reject with α = .01 C. Fail to reject the null hypothesis with α = .05 but reject with α...
Which research design would not be appropriate to analyze using a related-samples t-test? matched-pairs design collecting data from identical twins randomly assigned to one of two conditions repeated-measures design collecting data from the same set of participants who experience two conditions between-subjects design collecting data from two separate sets of participants randomly assigned to one of two conditions pre-post design collecting data from the same set of participants before and after undergoing a manipulation
For each example, state whether the one-sample, the two-independent-sample, or the related samples t-test is most appropriate. If it is a related samples t-test, indicate whether the test is a repeated measures design or a matched-pairs design. 1) A researcher matches right-handed and left-handed siblings to test whether right-handed siblings express greater emotional intelligence than left-handed siblings. A. one-sample t-test B. two-independent sample t-test C. related samples t-test using the repeated measures design D. related samples t-test using the matched-pairs...
er Preview we described a study Chants had more academic problems showing that students ights with less than average sleep wgtnits with more than average sleep Huynh,& Fuligni, 2013). Suppose Gillen-O'Neel her is attempting to replicate this stu researche! ple of n = 8 college freshmen. Each rds the amount of study time and amount each night and reports the number of problems each day. The following data show the results from the study Number of Academic Problems Following NightsFollowing...
Which of the following is an independent-measures design? a. All participants perform in every condition b. Each participant is tested twice, once in each condition c. Different participants perform in each condition d. None of the above
5. A two-tailed hypothesis test for a repeated-measures design A graduate student is interested in whether jounaling can affect grief and healing. For her study, she selects a random sample of 64 adults who have been widowed within the past 10 to 14 months. The subjects complete a battery of psychological questionnaires before and after spending two months journaling about their emotions. Before the two months of journaling, the mean score on the impact of event scale-avoidance subscale, which measures...