Lesson 2.2: Do we have Normal test scores?Here are the Chapter 1 Test scores for 80 of the current AP Statistics students.707878789187708063618387808085808393838793878087769178837683938789938585808383898576767678807885678980895991658083747678786578658776575987726578876780728985Is the distribution of Chapter 1 Test scores approximately normal? Justify your answer usingseveral different approaches. The group with the most convincing argument will win a prize.

First Approach: Normal distribution is symmetrical distribution, which implies that the mean, median…

Answered: Is the distribution of Chapter 1 Test…

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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Section 11.2 Question #4 The table below includes results from polygraph (lie detector) experiments conducted by researchers. In each case, it was known if the subjected lied or did not lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing between truth and lies? View the table Did the Subject Actually Lie? No (Did Not Lie) Yes (Lied) Polygraph test indicated that the subject lied. 9 48 Polygraph test indicated that the subject did not lie. 30 12 Determine the test statistic. χ2= _________ (Round to three decimal places as needed.) Determine the P-value of the test statistic. P-value= ___________ (Round to four decimal places as needed.)
Sophomore, junior, and senior students at a high school will be surveyed regarding a potential increase in the extracurricular student activities fee. There are three possible responses to the survey question - agree with the increase, do not agree with the increase, or no opinion. A chi-square test will be conducted to determine whether the response to this question is independent of the class in which the student is a member. How many degrees of freedom should the chi-square test have?
Rewrite the following sentence to remove its primary problem "We hypothesize that grade level has an effect on academic success."
For this example should a correlated or independent sample t test be used? Delayed posttest achievement scores were compared withimmediate posttest scores for all participants.
People were asked their gender and if the preferred Coke or Pepsi. The results are summarized in the table below. Test the claim that gender and soda preference are independent. Please provide the critical value, test statistic and conclusion. Coke Pepsi Male 53 26 Female 58 29
The director of student services at Oxnard College is interested in whether women are less likely to attend orientation than men before they begin their coursework. A random sample of freshmen at Oxnard College were asked what their gender is and whether they attended orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Women Men Yes 419 No 223 | 437 189 What can be concluded at the a = 0.01 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v Select an answer v (please enter a decimal and note that p1 and ul represent the proportion and mean for women and p2 and µ2 represent the proportion and mean for men.) H: Select an answer v Select an answer Select an answer (Please enter a decimal) b. The test statistic ? v (please show your answer to 3 decimal places.) c. The p-value = d. The p-value is ? va e. Based on this, we should Select…
A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in each group who later caught the flu was recorded. The results are shown below. Vaccinated Placebo Control Caught the flu 8 19 21 Did not catch the flu 142 161 79 Find and interpret the relative risk of catching the flu, comparing those who were vaccinated to those in the control group.

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Is the distribution of Chapter 1 Test scores approximately normal? Justify your answer usi several different approaches. The group with the most convincing argument will win a pri