1. Ten subjects were chosen for an experiment. They were asked to perform a certain physical activity. The number ofheartbeats per minute, before and after experiment are recorded as follows:SubjectBeforeAfterSubjectBeforeAfternumbernumber16092727626779771737272869814718075806872106876Is there sufficient evidence to indicate that the experiment condition increases the number of heartbeats per minute?Use a .05 level of significance.

There are two dependent samples which are before and after the experiment. We have to test whether…

Answered: 1. Ten subjects were chosen for an…

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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The following data were obtained froma repeated-measures research study. What is the value of SS for the difference scores? Subject #1 #2 2nd 1st 10 11 14 #3 9 #4 5 10 6. O 4 O 1 ㅇ
Subjects were classified according to which of three groups they were assigned. Group A received lots of praise, Group B received moderate praise, and Group C received no praise for correct answers to math problems. Following the manipulation, all subjects completed a posttest measure of mathematical ability. Group A Group B 4 Group C 7 3 6 6 2 1 8 3 3 4 7 1 Does praise influence performance? Use alpha = .05 +O4 57
The following data are from an experiment on carnations. The explanatory variable is the amount of inorganic bromine (micrograms per milliliter) in a plot of standard size. The response variable is the average number of flowers per carnation plant for the 30 plants grown in the plot. Which of the following statements is true? Bromine Average No. 3 4 3.2 2.9 6 3.7 C. 7 2.2 8 10 12 15 16 1.8 2.3 1.7 0.8 0.3 Select one: a. The value of r is positive and the scatterplot shows that the average number of flowers per carnation increases as the amount of bromine increases. b. The value of r is negative and the scatterplot shows that the average number of flowers per carnation decreases as the amount of bromine increases. The value of r is positive and the scatterplot shows that the average number of flowers per carnation decreases as the amount of bromine increases. d. The value of r is negative and the scatterplot shows that the average number of flowers per carnation increases as the amount…
Q According to a recent article about individuals who have credit cards, the mean number of cards per person with credit cards is 4. To test this result a random survey of 60 individuals who have credit cards was conducted. The survey only includes the number of credit cards per participant. The results of the survey are attached below. (a) What is the variable of interest in this study? Is it qualitative or quantitative? (b) Do the results of the survey imply that the mean number of cards per individual is less than 4? Use the a= 0.05 level of significance. Click the icon to view the data from the survey. C (a) What is the variable of interest in this study? Is it qualitative or quantitative? The variable of interest is It is a ▼variable. D Clear all Check answer Help me solve this View an example Get more help. 5:42 PM 6/18/2022 E Type here to search 3 7 S X E D C "42 $ R F % 5 T G 40 6 B Y H N C N 8 J M 9 K P 97°F Mostly sunny delete prt sc end 7 1
A certain stimulus was to be tested for its effects on blood pressure. Twelve men among the willing participants were chosen randomly for this purpose. The blood pressure of each person was measured before and after the administration of the stimulus. The results are as follow: Subject No. 1 2 3 4 5 7 8 9. 10 11 12 Before 121 123 119 129 128 139 137 140 127 125 131 126 After 129 132 128 130 127 140 137 141 134 130 133 125 Is there enough evidence to suggest that the stimulus, on the average, would raise the blood pressure by at least 3 points? (Hint: in this case Ho : HA µB + 3, where HA, HB are the respective mean blood pressure levels after and before the stimulus is administered.) The following `answers" have been proposed. (a) We reject the null hypothesis at the significance level a = 0.05. We could have made a type II error. (b) We reject the null hypothesis at the significance level a = (c) We do not reject the null hypothesis at the significance level a = 0.05. We could have…
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How much customers buy is a direct result of how much time they spend in the store. A study of average shopping times in a large national houseware store gave the following information (Source: Why We Buy: The Science of Shopping by P. Underhill). Women with female companion: 8.3 min.Women with male companion: 4.5 min. Suppose you want to set up a statistical test to challenge the claim that a woman with a female friend spends an average of 8.3 minutes shopping in such a store. (a) What would you use for the null and alternate hypotheses if you believe the average shopping time is less than 8.3 minutes? Ho: ? = 8.3; H1: ? ≠ 8.3Ho: ? < 8.3; H1: ? = 8.3 Ho: ? = 8.3; H1: ? < 8.3Ho: ? = 8.3; H1: ? > 8.3 Is this a right-tailed, left-tailed, or two-tailed test? right-tailedtwo-tailed left-tailed (b) What would you use for the null and alternate hypotheses if you believe the average shopping time is different from 8.3 minutes? Ho: ? = 8.3; H1: ? > 8.3Ho: ? ≠ 8.3; H1: ? = 8.3…

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