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...
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
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...
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...
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...
A social psychologist studying mass communication randomly assigned 87 volunteers to one of two experimental groups....
A social psychologist studying mass communication randomly assigned 87 volunteers to one of two experimental groups. Fifty-seven were instructed to get their news for a month only from television, and 30 were instructed to get their news for a month only from the Internet. After the month was up, all participants were tested on their knowledge of several political issues. The researcher simply predicted that there is some kind of difference. These were the results of the study. TV group:...
Which of the designs below would be best suited to ANCOVA? a. Participants were randomly allocated...
Which of the designs below would be best suited to ANCOVA? a. Participants were randomly allocated to one of two stress management therapy groups, or a waiting list control group. The researcher was interested in the relationship between the therapist’s ratings of improvement and stress levels over a 3-month treatment period. b. Participants were allocated to one of two stress management therapy groups, or a waiting list control group based on their baseline levels of stress. The researcher was interested...
In a study on the effects stress on behaviour in rats, 78 rats were randomly assigned...
In a study on the effects stress on behaviour in rats, 78 rats were randomly assigned to either a stressful environment or a control (non-stressful) environment. After 21 days, the change in weight (in grams) was determined for each rat. The following table summarises the data on weight gain: n sample mean sample standard deviation Stress 23 21.08 13.49 No stress 55 28.14 15.39 1.2 (1 mark) Calculate the value of the t-statistic to three decimal places 1.3 (.6 marks)...
(21.28) Healthy men aged 21 to 35 were randomly assigned to one of two groups: half...
(21.28) Healthy men aged 21 to 35 were randomly assigned to one of two groups: half received 0.82 grams of alcohol per kilogram of body weight; half received a placebo. Participants were then given 30 minutes to read up to 34 pages of Tolstoy's War and Peace (beginning at chapter 1, with each page containing approximately 22 lines of text). Every two to four minutes participants were prompted to indicate whether they were "zoning out." The proportion of times participants...
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...
A social psychologist studying mass communication randomly assigned 87 volunteers to one of two experimental groups. Fifty-seven were instructed to get their news for a month only from television, and 30 were instructed to get their news for a month only from the Internet. After the month was up, all participants were tested on their knowledge of several political issues. The researcher simply predicted that there is some kind of difference. These were the results of the study. TV group:...
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