DIRECTIONS: 2. Identify the appropriate hypothesis test for each of the following research situations labeled (a) - (d). Make sure to label yourresponses clearly!(a) A researcher conducts a developmental study to determine if there is a significant difference in social skills between 9-year-old and 11-year-old children.(b) A researcher records the daily caffeine consumption and the activity level of a group of college freshman. The researcher would liketo determine whether there is a significant relationship between caffeine level and activity.(c) A researcher would like to determine whether a 4-week therapy program produces significant changes in behavior. A group of 25participants is measured before therapy, at the end of therapy, and again 3 months after therapy.(d) A researcher would like to determine whether a new program for teaching statistics is significantly better than the old program. It issuspected that the new program will be very effective for small-group instruction but less effective with larger classes. The study involvescomparing four groups of students: a small class taught in the new method, a small class taught in the old method, a large class taught in thenew method, and a large class taught in the old method.

a) A researcher conducts a developmental study to determine if there is a significant difference in…

Answered: 2. Identify the appropriate hypothesis…

Math

Statistics

2. Identify the appropriate hypothesis test for each of the following research situations labeled (a) - (d). Mal arly!

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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7. For each of the following, indicate the appropriate hypothesis test (one-sample z-test, one-sample t-test, independent-measures t-test, or dependent-measures t-test). If your response is dependent-measures t-test, indicate the "flavor" of the dependent measures t-test. d. A different researcher also conducts a study involving relaxation training. Baseline levels of test anxiety are recorded for a sample of subjects. Then all subjects receive relaxation training for 3 weeks and their anxiety levels are measured again. e. In a test anxiety study, two samples are used. Subjects are assigned to groups so they are matched for self-esteem and grade-point average. One sample receives relaxation training for three weeks and the second serves as a no-treatment control group. Test anxiety is measured for both groups at the end of three weeks.
If the results of the test with the following hypotheses are statistically significant, we have found evidence that: Hypotheses: Ho :H1 = H2 Ha:H1>H2 Hi = H2 X1H2 X1 # X2 X1>X2 Hi
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1. The incidence of cancer among phosphate mine workers and their exposure to radiation was investigated. Cancer incidence was recorded among 60 phosphate mine workers who had 0-29 working level months (WLM) of exposure, 60 phosphate mine workers who had 30-89 WLM of exposure, and 60 phosphate mine workers who had 90-120 WLM of exposure. The number of cancer incidences for each group are presented in Table 1. Table 1: Two-way Table of Counts Cancer Incidence Exposure Level Yes No Total 0-29 WLM 20 40 60 30-89 WLM 33 27 60 90-120 WLM 43 17 60 Total 96 84 180 Perform a x? test, at the 5% level of significance, whether cancer incidence rates differ between the three levels of radiation among phosphate mine workers.
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Imagine you are doing a Related-Samples t-test, and you are on Step One of the hypothesis test. If you are doing the test with α = .05, and two tails, how would the H0 (null hypothesis) look?
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