Answered: d. How many degrees of freedom are…

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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A researcher is trying to determine if nurses who complete a 12-week social activity program have increased levels of job satisfaction at the end of the program compared to when they started it. Which procedure should he use? O Independent samples t-test Repeated measures t-test ANOVA Matched samples t-test étv A O W MacBook Pro
What is the p-value?
3) Examine your t-test score in the paired samples t-test table. Is the p value significant? State in one to two sentences whether the test was significant and interpret this result.
ACT Scores Based on the Normal model (mean = 20.8 and standard deviation = 4.8), describing ACT scores for Kentucky high school seniors. a) what percent scores would you expect to be over 22 (minimum admission for most state schools except Kentucky State and Uni. of Kentucky)? Draw a picture. b) what percent of scores would you expect ot be below 17 (minimum for admission to the rest of the state schools not mentioned). Draw a picture 3) what act score represents the 90th percentile? Draw a picture.
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Below indicate whether the appropriate test would be an independent t-test, dependent t-test, One-way ANOVA, or z-test. A researcher wants to know if people find baby animals cuter than adult animals. All of the participants in a study are shown 10 pictures of baby animals and 10 pictures of adult animals. They are asked to rate (on a 1 to 10 scale) how cute they think each animal is.
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You want to test whether a blood pressure medication actually works. You give it to a group of n = 30 patients. You get another group of n=25 patients and give them a placebo. You want to compare the two groups to see whether they have a mean difference in blood pressure. What kind of hypothesis test should you do? One-Sample z-test Independent-Samples t-test Related-Samples t-test One-Sample t-test
You want to compare differences in prior arrests across ethnicity in your study, you measured ethnicity as white =0 black =1 hispanic=2, and other =3. Prior arrests was recorded as the number of prior arrests. which test would you perform to see if arrests differ across diffrent ethnic categories? A. ANOVA B. T-test
What is t critical for a study that contains 9 participants in one group and 11 is another group? Input three decimals. Answer:
the decision rule for any kind of test is? A. reject the Ho if the p-value associated with the computed value is greater than 0.05 B. Reject the Ho if the p-value associated with the computed value is less than 0.05 What is the correct answer?
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d. How many degrees of freedom are there? e. If appropriate perform a test of independence, using the =0.05 level of significance. If not appropriate, explain why.