x Hoehange Activitie MeanXzy Section 8.1- MAT 240 Applied S XO https://learn.zybooks.com/zybook/MAT-240-14373-OL-TRAD-UG.22EWA/chapter/B/section/1?content resource. A a saMy library > MAT 240 Applicd Statistics home >8.1: Hypothesis tests for the difference between two population means= zyBooksE zyBooks catalogO Help/FAQ e Lashonda CurryJump to level 1An online math tutor service would like to claim that the average tirme spent taking a standardized test after studentsgo through tutoring is less than the average time spent before going through tutoring. A simple random sample ofstudents takes a pre-test, then goes through tutoring and takes a post-test. Results of the sample are shown below.AtrWhat are the population parameters?Mean75.554Veriene126.44 125.20PickObservations18Peron CerrelationHypothesied Men DereneIs the two sample hypothesis test a paired f-test or an unpaired t-test?1StatLASPickMlenetLORkal onetal4.40le tal110What is the level of significance? Ex: 0.12LORkelttelConfidence LevelWhat is the null hypothesis Ho? Pick vWhat is the alternative hypothesis H? Pick vShould Ho be rejected or does Ho fail to be rejected? PickWhat conclusion can be drawn from the data?v evidence exists to support the clairm that the mean time spent taking a test after tutoring is less thanthe mean time spent taking a test before tutoring.Pick2CheckNext1011 PM80°F A A4/23/2022P Type here to searchA57)IraertPriacDoletFO&BackspaceNumLock5821346RITUQHomeGJKEnterCMShiftEnd+ PgUpAltCtrlAltEndHome+ PgDn

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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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Question content area top Part 1 Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person randomly selected 100 checks and recorded the cents portions of those checks. The table below lists those cents portions categorized according to the indicated values. Use a 0.025 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts would result in a disproportionately high frequency for the first category, but do the results support that expectation? Cents portion of check 0-24 25-49 50-74 75-99 Number 61 10 16 13
Answer all parts please
RECIDIVISM Report a Chi-Square test of Independence and use a 5% significance level. Explain the potential error in words, in context. Group of answer choices We would be accepting that there was an association between Recidivism and Treatment, when there was none. We would not be accepting that there was an association between Recidivism and Treatment, when there was indeed none. We would be not accepting that there was an association between Recidivism and Treatment, when there actually was one. We would be accepting that there was an association between Recidivism and Treatment, when there was indeed one.
RECIDIVISM Report a Chi-Square test of Independence and use a 5% significance level. Choose the options that would create the correct final conclusion. The P-value is [ Select ] ["not very low", "low"] so we [ Select ] ["cannot conclude", "conclude"] that there [ Select ] ["is an association", "is no association"] between Recidivism and Treatment.
Which of the following is an example of a two-way ANOVA test? Group of answer choices Comparing the number of hours that freshman and seniors study during a semester. Analyzing the number of hours that freshman, sophomores, juniors, and seniors study in a semester as well as the number of hours of sleep each group gets at night. Comparing the number of hours of sleep for freshman, sophomores, juniors, and seniors. Studying the number of hours of sleep for freshmen, sophomores, and juniors. All of the above are two-way ANOVA problems
Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
M&Ms Data Set 27 “M&M Weights” in Appendix B lists data from 100 M&Ms, and 27% of them are blue. The Mars candy company claims that the percentage of blue M&Ms is equal to 24%. Use a 0.05 significance level to test that claim. Should the Mars company take corrective action?
The ___________ is a value used in making a decision about the null hypothesis and is found by converting the sample statistic to a score with the assumption that the null hypothesis is true.
A sample of freshman takes a reading comprehension test and their scores are summarized below. Sample scores: 16, 8, 8, 6, 9, 11, 13, 9, 10 a. if the mean for the general population on this test is m=12, can you conclude that this sample is significantly different from the population. Test with a=.05 b. Calculate a 90% confidence interval around your mean.
If you are running a hypothesis test and increase your sample size, what will happen to your Type I and Type Il error? a. Type I will increase, Type Il will increase b. Type I will decrease, Type Il will decrease O c. Type I will increase, Type II will decrease O d. Type l will decrease, Type II will increase
Perform the following hypothesis test of a proportion: HO: p = 0.33 HA: p 0.33 The sample proportion is 0.31 based on a sample size of 100. Use a 10% significance level. What is the value of the test statistic? (Give your answer rounded to 2 decimals) (Be careful to make sure your + or - sign is correct)
If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate? Multiple Choice The p-value is greater than a. At least one pair of population means is different. The population means are equal. All population means are different.

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