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:SubjectBeforeAfterSubjectBeforeAfternumbernumber16092727667797717337272698171809.75806872106876Is there sufficient evidence to indicate that the experiment condition increases the number of heartbeats per minute?Use a .05 level of significance.

Solution: Before After d=After -Before (d-d ) (d-d )2 60 92 32 23.2 538.24 67 79 12 3.2…

Answered: 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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2. Ten subjects were chosen for an experiment. They were asked to perform a certain physical activity. The number of heart beats per minute, before and after the experiment, was recorded as follows: Subject No. Before After Subject No. After Before 1 60 92 72 76 67 79 7 71 73 72 72 8 69 81 4 71 80 9 75 80 68 72 10 68 76 Is there sufficient evidence to indicate that the experimental condition increases the number of heart beats per minute? Test at 1% significance level.
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An experiment was conducted in which two fair dice were thrown 100 times. The sum of the dice was then recorded. The following frequency histogram gives the results. Sum of Two Dice 25 20 5 0 - 2 3 5 6 7 8 9 10 11 12 Value of Dice (a) What was the most outcome of the experiment?Blank 1 (b) What was the least frequent? Blank 2 (c) How many times did we observe a 7? Blank 3 (d) Determine the percentage of time a 7 was observed. Blank 4 (e) Describe the shape of the distribution (skewed left, skewed right, bell-shaped) Blank 5 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer tes remaining Frequency
You want to see if it makes a difference which lane to be in when there is traffic. You randomly observe 296 cars as they pass by on the four lane freeway. The results are displayed in the table below. Use a level of significance of a = 0.10. a. Complete the rest of the table by filling in the expected frequencies: Frequency of Cars in Each Lane Outcome Frequency Expected Frequency Lane 1 73 Lane 2 59 Lane 3 79 Lane 4 85 b. What is the correct statistical test to use? Select an answer < c. What are the null and alternative hypotheses? Ho: The traffic and lanes are independent. The distribution of traffic is not uniform. The distribution of traffic is uniform. The traffic and lanes are dependent. H1: The traffic and lanes are independent. O The distribution of traffic is uniform. The distribution of traffic is not uniform. The traffic and lanes are dependent.

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