A total of N =30 participants were randomly assigned to either the experimental arm (n= 15)...
A total of N =30 participants were randomly assigned to either the experimental arm (n= 15) or the control arm (n= 15) and the independent samples t-test was employed. What is the df? a) 13 b) 14 c) 28 d) 29
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A total of N =30 participants were randomly assigned to either
the experimental arm (n= 15)...
In this study, participants were randomly assigned to one of two groups – to watch either...
In this study, participants were randomly assigned to one of two groups – to watch either a NEUTRAL or EMOTIONAL movie clip. After watching for an hour, participants were asked to rate work place satisfaction using an inventory that ranges from 0 – 10 (with higher indicating higher satisfaction). Assume data meets all assumptions for a parametric test. Using the information provided, create an SPSS data file and conduct the appropriate statistical test to determine whether there is a statistically...
If a paired-samples t-test and an independent samples t-test both have df = 16, which experiment...
If a paired-samples t-test and an independent samples t-test both have df = 16, which experiment used more participants? They both used the same number of participants (n = 18). (A) (B) They both used the same number of participants (n = 17). (C) The paired-samples t-test. (D) The independent samples t-test.
A study is considered a(n) ______ design because all the participants will complete the same task...
A study is considered a(n) ______ design because all the participants will complete the same task in two different environments. Group of answer choices between-subjects within-groups within-subjects between-groups ______ is a between-subjects experiment that involves sets of participants matched on a specific characteristic with each member of the set randomly assigned to a different level of the independent variable. Group of answer choices Related/paired samples t test Post hoc design Matched design Pretest–posttest design
Patients are randomly assigned to undergo psychotherapy or behavioral therapy. After 20 therapeutic sessions, each patient...
Patients are randomly assigned to undergo psychotherapy or behavioral therapy. After 20 therapeutic sessions, each patient takes a mental health questionnaire. What test would be used to see if there are differences in mental health at the end of therapy? (a) z test (b) t test for one sample (c) t test for two independent samples (d) t test for two related samples A researcher wants to test the hypothesis that visualization improves short-term memory. She randomly selects a group...
A researcher wanted to examine if the type of music one listens to while studying affects...
A researcher wanted to examine if the type of music one listens to while studying affects memory performance. She randomly selected five samples of participants and assigned each of them to one of five experimental conditions - listening to classical music, jazz, R&R, R&B or Hip hop. Each sample had 14 subjects (n = 14). All participants were asked to memorize a list of words while listening to one of the five types of music tested. At the end, all...
A two-arm, randomized, double-blinded trial tested the efficacy of an experimental cancer treatment (Tx), in terms...
A two-arm, randomized, double-blinded trial tested the efficacy of an experimental cancer treatment (Tx), in terms of tumor shrinkage (“response”). A total of 800 cancer patients were randomized either to Tx (n = 400) or to control (n = 400). At the end of a 2-year follow-up period, a total of 225 patients responded in the Tx group while 200 responded in the control group (56.25% vs. 50.00%, chi-square test p = 0.08). 1.Compute either the relative risk (RR) or...
an independent measures research study uses 2 samples, each with n=12 participants. if the data produce...
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
Dr. X conducted an experiment to study the effects of massed versus distributed practice on memory. Ten participants were randomly assigned to study a short chapter of a psychology text during either...
Dr. X conducted an experiment to study the effects of massed versus distributed practice on memory. Ten participants were randomly assigned to study a short chapter of a psychology text during either a single 3-hour session or 3 one-hour sessions separated by 24 hours. Five people were in the Massed condition and five in the Distributed condition. Twenty-four hours after the study session(s) ended, the participants took an examination on the information in the chapter and the number of correct...
High School students were given a short course in basic algebra. Students were randomly assigned to...
High School students were given a short course in basic algebra. Students were randomly assigned to one of the following conditions: courses lasting for 5, 10, or 15 sessions. At the conclusion of the course, participants were asked to take an exam which included several math problems. Before taking the test, participants in each group were offered a monetary incentive-no money, $ 15.00 or $ 30.00 for a certain level of performance. The researcher collected the number of correct answers...
Could you help me with 49-52? Subjects with BMI2 30 kg-m2 (n-48) were randomly assigned to...
Could you help me with 49-52?
Subjects with BMI2 30 kg-m2 (n-48) were randomly assigned to one of two isocaloric diets (1-High Protein; 2-High Carbohydrate) and one of three doses of a drug to curb hunger (100; 200; 300 mg). Diet and dose are between-subjects factors. Subjects were ranked on calculated BMI from low to high and placed into eight (8) groups, each consisting of six (6) homogeneous subjects. Within each of the 8 groups, subjects were randomly assigned to...
Could you help me with 49-52?
Subjects with BMI2 30 kg-m2 (n-48) were randomly assigned to one of two isocaloric diets (1-High Protein; 2-High Carbohydrate) and one of three doses of a drug to curb hunger (100; 200; 300 mg). Diet and dose are between-subjects factors. Subjects were ranked on calculated BMI from low to high and placed into eight (8) groups, each consisting of six (6) homogeneous subjects. Within each of the 8 groups, subjects were randomly assigned to...
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