A school psychologist was asked to assess a group of 17 students who failed their math exam. Shescreened for possible learning disabilities and wanted to check their global IQ scores. Each studentwas asked to complete a global IQ test. After conducting a correlation, she found that there was astrong positive correlation with r= 0.79 between IQ and math exam scores which was found tosignificant at p < 0.05. Based on the correlation, IQ was found to explain 61% of the variability in thestudent's math exam scores.After conducting the correlation, the teacher took another random group of 18 students who scoredwell in their math exam. She created two groups based on math exam scores (Group 1 high examscores Vs Group 2 failed exam scores). The psychologist hypothesises that the students in the failedexam score group will have lower global IQs than students in the high exam score group who wereused as a control group.A trial was conducted to assess the impact of IQ on math scores. The two groups of 35 students wereasked to complete a global IQ test. Global IQ data were collected in 35 participants and the followingresults were reported in a journal article.Table. Math exam groups and IQ data for students (N= 35)Participant IDMathIQ Score Participant IDMathIQ ScoreGroupsGroups1100191105822011033110921111242105221975.211023299111824967197251088.108261096.2.1122710411242811710110429111411953021061210631991398943214892109331598110341611001053517Note: Math Groups are coded as 1 = high math exam scores and 2 = failedPreliminary assumptions testing indicated that both the high math score exam group 1 (M= 104.61, SD= 10.64) and failed math group 2 (M = 103.82, SD = 5.38) scores were normally distributed. Anindependent samples t-test was used to compare the IQ for high math exam score group and failedexam group. The ttest was non-significant, t(25.46) = 0.28, p=.783, two tailed, d= 0.092.2.2)212.2)2)2.6o What was the first consideration in the decision process behind the psychologist selecting anindependent samples t test to test their hypothesis?Select one:O a. deciding between a paired or independent samples analysis if samples are independent?O b. deciding between single or independent samples if using a control group?O c. deciding between a z or t test if we don't know the population standard deviation?O d. deciding between paired or independent samples if using a control group?

If we have two samples, first we heck whether the data for subjects is recorded twice for the same…

Answered: What was the first consideration in the…

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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As quality control inspector, you have previously believed a claim that 3.2% of items made on your production line are defective. To see if you should still believe this claim: you decide to do a two sided significance test, with a significance level of 2%. You then randomly sample 420 items from the production line, and find that 22 of the items are defective. Which of the following are correct general statements about the conclusion that you find from the significance test? Select all that apply 1. The P-value from your test, is less than or equal to your chosen alpha value. 2. Your sample results are not statistically significant. 3. You reject the null hypothesis in favor of the two sided alternative. 4. Your sample results are statistically significant 5. Based upon the evidence from your significance test, you should no longer believe the null hypothesis claim. 6. Based upon the evidence from your significance test, you have no reason to stop believing the null hypothesis…
Below indicate whether the appropriate test would be an independent t-test, dependent t-test, One-way ANOVA, or z-test. A researcher studying psychological well-being between children from single-parent vs. two-parent families recruits 20 children from two-parent families and 20 children from single-parent families and measures their psychological adjustment.
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