An elementary school started a special reading enrichmentprogram for seventh-graders that has been underway for eightmonths. One of the investigators wants to confirm the program ishaving its intended effect, and collects a sample of 34 studentsfrom the program with a standardized reading test average of 24.1.The standardized reading test average for seventh-graders in thecountry is 26.1 with a standard deviation of 4.9. What can theinvestigator conclude with ? = 0.01?
a) What is the appropriate test statistic?
---Select--- na z-test one-sample t-test independent-samples t-testrelated-samples t-test
b)
Population:
---Select--- the school seventh-graders in the program the programmonths seventh-graders in the country
Sample:
---Select--- the school seventh-graders in the program the programmonths seventh-graders in the country
c) Compute the appropriate test statistic(s) tomake a decision about H0.
(Hint: Make sure to write down the null and alternative hypothesesto help solve the problem.)
critical value = ; test statistic =
Decision: ---Select--- Reject H0 Fail to reject H0
d) If appropriate, compute the CI. If notappropriate, input "na" for both spaces below.
[ , ]
e) Compute the corresponding effect size(s) andindicate magnitude(s).
If not appropriate, input and select "na" below.
d = ; ? ---Select--- na trivial effect smalleffect medium effect large effect
r2 = ; ? ---Select--- na trivialeffect small effect medium effect large effect
f) Make an interpretation based on theresults.
The standardized reading test of seventh-graders in the specialreading enrichment program is significantly higher thanseventh-graders in the country.The standardized reading test ofseventh-graders in the special reading enrichment program issignificantly lower than seventh-graders in thecountry. The standardized reading test ofseventh-graders in the special reading enrichment program is notsignificantly different than seventh-graders in the country.
