A medical researcher wants to determine whether exercising can lower blood pressure. She recruits 100 people with high blood pressure to participate in the study. She assigns a random sample of 50 of them to pursue art exercise program that includes daily swimming and jogging. She assigns the other 50 to refrain from vigorous activity. She then measures the blood pressure of each of the 100 individuals both before and after the study.

A medical researcher wants to determine whether exercising can lower blood pressure. She recruits 100 people with high blood pressure to participate in the study. She assigns a random sample of 50 of them to pursue art exercise program that includes daily swimming and jogging. She assigns the other 50 to refrain from vigorous activity. She then measures the blood pressure of each of the 100 individuals both before and after the study.

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Description: A medical researcher wants to determine whether exercising can lower bloodpressure. She recruits 100 people with high blood pressure to participate in the study.She assigns a random sample of 50 of them to pursue art exercise program thatincludes da

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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A certain virus affects 0.4% of the population. A test used to detect the virus in a person is positive 90% of the time if the person has the virus (true positive) and 10% of the time if the person does not have the virus (false positive). Fill out the remainder of the following table and use it to answer the two questions below based on a total sample of 100,000 people. Virus No Virus Total Positive Test Negative Test Total 100,000 a) Find the probability that a person has the virus given that they have tested positive. Round your answer to the nearest hundredth of a percent and do not include a percent sign. % b) Find the probability that a person does not have the virus given that they test negative. Round your answer to the nearest hundredth of a percent and do not include a percent sign. %
A businesswoman is considering whether to open a coffee shop in a local shopping center. Before making this decisionshe wants to know how much money people spend per week at coffee shops in that area. She took a random sample of 26 customers from the area who visit coffee shops and asked them to record the amount of money (in dollars) they would spend during the next week at coffee shops. At the end of the week, she obtained the following data (in dollars ) from these 26 customers 16.81 38.53 15.27 14.33 5.03 63.79 10.31 13.30 32.13 35.99 16.23 66.00 10.21 37.10 3.20 6.97 34.71 6.45 36.42 27.73 38.58 13.23 9.69 9.43 1.17 5.33 round you answers to cent what is the point estimate of the corresponding population mean? x bar = $ Make a 90% confidence interval for the average amount of money spent per week at coffee shop by all customers who visit coffee shop in this area $ ( ) to $ ( )
An experimenter investigated the effects of blue light exposure on people’s sleep quality. Researchers get 50 people and randomly assign 25 people to be exposed to blue light for 20 min. before bed and the other 25 people to have no blue light exposure 25 min. before bed. Each participant is sent to bed at 10pm and woken up at 7am the next morning. When all participants are woken up, they must fill out a sleep quality questionnaire. The scores seen below represent participants’ sleep quality ratings where higher numbers indicate better sleep quality. Does the blue light exposure negatively impact sleep quality? Blue light No Blue light 11 13 14 16 10 14 11 17 8 13 15 14 12 15 13 18 9 12 11 12 1. Analyze the data by hand or with SPSS/PSPP/JASP using the most…
A businesswoman is considering whether to open a coffee shop in a local shopping center. Before making this decisionshe wants to know how much money people spend per week at coffee shops in that area. She took a random sample of 26 customers from the area who visit coffee shops and asked them to record the amount of money (in dollars) they would spend during the next week at coffee shops. At the end of the week, she obtained the following data (in dollars ) from these 26 customers 16.81 38.53 15.27 14.33 5.03 10.31 13.30 32.13 35.99 16.23 66.00 10.21 37.10 3.20 6.97 34.71 6.45 36.42 27.73 38.58 13.23 9.69 9.43 1.17 5.33 round you answers to cent what is the point estimate of the corresponding population mean? x bar = $ Make a 90% confidence interval for the average amount of money spent per week at coffee shop by all customers who visit coffee shop in this area $ ( ) to $ ( ) please help it's for a test Thank you!
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