Homework Help is Here – Start Your Trial Now!
Math
Statistics
Selecting the Appropriate Inferential Test: For each of the following: a) where applicable, identify the independent and dependent variables; b) write the null and the alternative hypotheses; c) find the critical value(s) and make sure to note whether the test is one- or two-tailed; d) state what type of test to perform (e.g., one sample z, paired samples t test, One Way ANOVA, etc.) Assume alpha = .05 for each problem. 1) A study is conducted to determine how the stimulant drug Adderall impacts the ability to sustain attentional vigilance. Twenty-two college students perform a computerized test of attentional vigilance two times; one test is performed immediately after taking Adderall and the other test is performed without the drug treatment. Tests 1 and 2 are carried out one week apart. The researchers will test the hypothesis that Adderall improves vigilance.

Selecting the Appropriate Inferential Test: For each of the following: a) where applicable, identify the independent and dependent variables; b) write the null and the alternative hypotheses; c) find the critical value(s) and make sure to note whether the test is one- or two-tailed; d) state what type of test to perform (e.g., one sample z, paired samples t test, One Way ANOVA, etc.) Assume alpha = .05 for each problem. 1) A study is conducted to determine how the stimulant drug Adderall impacts the ability to sustain attentional vigilance. Twenty-two college students perform a computerized test of attentional vigilance two times; one test is performed immediately after taking Adderall and the other test is performed without the drug treatment. Tests 1 and 2 are carried out one week apart. The researchers will test the hypothesis that Adderall improves vigilance.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
Selecting the Appropriate Inferential Test: For each of the following: a) where applicable, identify the independent and dependent variables; b) write the null and the alternative hypotheses; c) find the critical value(s) and make sure to note whether the test is one- or two-tailed; d) state what type of test to perform (e.g., one sample z, paired samples t test, One Way ANOVA, etc.) Assume alpha = .05 for each problem. 1) A study is conducted to determine how the stimulant drug Adderall impacts the ability to sustain attentional vigilance. Twenty-two college students perform a computerized test of attentional vigilance two times; one test is performed immediately after taking Adderall and the other test is performed without the drug treatment. Tests 1 and 2 are carried out one week apart. The researchers will test the hypothesis that Adderall improves vigilance.
Transcribed Image Text:Selecting the Appropriate Inferential Test: For each of the following: a) where applicable, identify the independent and dependent variables; b) write the null and the alternative hypotheses; c) find the critical value(s) and make sure to note whether the test is one- or two-tailed; d) state what type of test to perform (e.g., one sample z, paired samples t test, One Way ANOVA, etc.) Assume alpha = .05 for each problem. 1) A study is conducted to determine how the stimulant drug Adderall impacts the ability to sustain attentional vigilance. Twenty-two college students perform a computerized test of attentional vigilance two times; one test is performed immediately after taking Adderall and the other test is performed without the drug treatment. Tests 1 and 2 are carried out one week apart. The researchers will test the hypothesis that Adderall improves vigilance.
n(Ɛ D²)– (E D)² п -1 n = number of pairs of scores (for example, if 8 people are measured at tl and t2, df = 8-1 = 7) D = the difference between each pair of scores ED = the sum of the differences (ED²) = the sum of the squares of the differences (ED)²= the sum of the differences squared t score: Independent Samples t-test (degrees of freedom = (n1 – 1) + (n2 – 1)) п, — 1 -1 = mean of first group (sample) X2= mean of second group (sample) s1 = sample variance of first group s?2 = sample variance of second group n1 = number of subjects (or observations) in the first group n2 = number of subjects in second group Be careful about computing the denominator; pay attention to whether you are working with sample variances or standard deviations to make sure your computations are correct. One Way ANOVA (see ANOVA table for degrees of freedom) Between Groups Sum of Squares: Subtract the grand mean from each group mean, square the deviation, multiply by n in each group and add the values together. SSsΣη (X.- (X, n = the number of subjects or observations in a group X, = the mean for any group (1 through n) of subjects X g = the overall, or grand, mean for all subjects or observations Within Groups Sum of Squares: Subtract each group's mean from the individual scores and add them all up. SSWΣΣ (X- Χ. X = any single score within any particular group X,= the mean of any particular group nG = number of groups N= total # of subjects/observations df MS F Treatment F = MS3 = Ss, / dfg SS. dfg = ng-1 (Between= B) MS /MSw Error (Within= W) SSw dfw = N -ng MSw= SSw/ dfw Total SSTotal = SSg + SSw dfrotal= N -1 = df,+ dfw
Transcribed Image Text:n(Ɛ D²)– (E D)² п -1 n = number of pairs of scores (for example, if 8 people are measured at tl and t2, df = 8-1 = 7) D = the difference between each pair of scores ED = the sum of the differences (ED²) = the sum of the squares of the differences (ED)²= the sum of the differences squared t score: Independent Samples t-test (degrees of freedom = (n1 – 1) + (n2 – 1)) п, — 1 -1 = mean of first group (sample) X2= mean of second group (sample) s1 = sample variance of first group s?2 = sample variance of second group n1 = number of subjects (or observations) in the first group n2 = number of subjects in second group Be careful about computing the denominator; pay attention to whether you are working with sample variances or standard deviations to make sure your computations are correct. One Way ANOVA (see ANOVA table for degrees of freedom) Between Groups Sum of Squares: Subtract the grand mean from each group mean, square the deviation, multiply by n in each group and add the values together. SSsΣη (X.- (X, n = the number of subjects or observations in a group X, = the mean for any group (1 through n) of subjects X g = the overall, or grand, mean for all subjects or observations Within Groups Sum of Squares: Subtract each group's mean from the individual scores and add them all up. SSWΣΣ (X- Χ. X = any single score within any particular group X,= the mean of any particular group nG = number of groups N= total # of subjects/observations df MS F Treatment F = MS3 = Ss, / dfg SS. dfg = ng-1 (Between= B) MS /MSw Error (Within= W) SSw dfw = N -ng MSw= SSw/ dfw Total SSTotal = SSg + SSw dfrotal= N -1 = df,+ dfw
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS