Suppose that 5000 students who have taken the SATexam once are randomly assigned to either take an SATcoaching course or not, with the following results in theirimprovements in SAT scores when they take the exam asecond time:CoachingGroupControlGroupSampleSample Size Sample Mean StandardDeviation2500250046.244.412.35.5 Which decision should be made regarding the nullhypothesis based on the null hypothesis?Accept the null hypothesisTo little information to make a decision regarding the null hypothesisFail to reject the null hypothesisReject the null hypothesis

n1=n2=2500,X1¯=46.2,s1=12.3,X2¯=44.4,s2=5.5

Answered: Which decision should be made regarding…

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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14) A traffic-safety researcher is studying driver’s behavior (complete stop, coasting stop, ran stop sign) at a specific stop sign. The researcher would like to know if driver behavior depends on the type of vehicle (car, sport utility vehicle [SUV], pickup truck). a) What is the appropriate null and alternate hypothesis to determine if stop sign behavior depends on type of vehicle? b) The traffic-safety researcher observes 500 vehicles at the stop sign and records the two variables: the type of vehicle (car, sport utility vehicle [SUV], pickup truck) and the driver’s behavior at the stop sign (complete stop, coasting stop, ran stop sign). The data appears below. Use JMP software to test the hypothesis of part a). c) Using alpha= 0.05, draw a conclusion for the hypothesis test and state the conclusion in the context of the problem. SUV stop Car stop Car coast Car coast SUV coast Car stop Car coast Car coast Car stop Pickup coast Car coast Car ran Car…
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I need help on my classwork
28 a-true b-false
what is the correct choice
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Failing to reject a false null hypothesis is also called? * O 1-B O 1- a O Type I Error O Type II Error
4. attachment
All test of hypothesis are based on the assumptions that A. The null hypothesis is true B. The observed difference is important c. The null hypothesis is false and should be rejected D. Type l errors are more serious than type ll errors E. None of the above
For the next items, identity the appropriate statistical test that will be utilized in hypothesis testing. SE T- test T- test (one factor/sample) (Dependent) (Independent) T-test F- Test (Standard Error)
LU use tne appro gy to aiIswer Consider the following hypothesis test. Hoi H1- H2 = 0 Ha: H1 - 42 # 0 The following results are from independent samples taken from two populations. Sample 1 Sample 2 = 35 n2 = = 40 X1 = 13.6 X2 = 10.1 S1 = 5.3 S, = 8.4 (a) What is the value of the test statistic? (Use x, - X,. Round your answer to three decimal places.) (b) What is the degrees of freedom for the t distribution? (Round your answer down to the nearest integer.) (c) What is the p-value? (Round your answer to four decimal places.) p-value %3D (d) At a = 0.05, what is your conclusion? Reject Ho. There is insufficient evidence to conclude that u, H2 # 0. Do not Reject Ho. There is sufficient evidence to conclude that u, - u, + 0. Do not Reject Ho: There is insufficient evidence to conclude that H2 # 0. Reject Ho. There is sufficient evidence to conclude that µ, - µ, # 0.
while the decision The decision to reject a true null hypothesis is called to accept a false null hypothesis is A. Type I error; Type II error В. Туре II error; Туpe I error C. Type I error; a correct decision D. A correct decision; Type I error

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Which decision should be made regarding the null ypothesis based on the null hypothesis? O Accept the null hypothesis O To little information to make a decision regarding the null hypothesis O Fail to reject the null hypothesis O Reject the null hypothesis