Homework Help is Here – Start Your Trial Now!
Math
Statistics
smell if exposed to the chemical repeatedly. Does this change in sensitivity happen in the nose or in the brain? Mainland et a (2002) exposed one nostril of each of 12 non-detector participants to androstenone for short periods every day for 21 days. The other nostril was plugged and had humidified air flow to prevent androstenone from entering. After the 21 days, the researchers found that 10 of 12 participants had improved androstenone-detection accuracy in the plugged nostril, whereas two had reduced accuracy. This suggested that increases in sensitivity to androstenone happen in the brain rather than the nostril since the epithelia of the nostrils are not connected. The authors conducted a statistical hypothesis test of whether accuracy, in fact, did change. Let p refer to the proportion of non-detectors in the population whose accuracy scores improve after 21 days. Under the null hypothesis, p = 0.5 (as many participants should improve as deteriorate in their accuracy after 21 days). The alternative hypothesis is that p ‡ 0.5 (the proportion of participants increases or decreases after 21 days). The accompanying figure shows the null distribution for the number of participants out of 12 having an improved accuracy score The probability of each outcome is given above the bars. Probability 0.25 0.20 0.15 0.10- 0.05 0.00 0.0002 0.003 0.016 0.054 0.121 0.193 0.226 0.193 0.121 0.054 0.016 0.003 0.0002 0 1 2 3 4 5 6 7 8 9 10 11 12 Number of participants improving Whitlock & Schluter, The Analysis of Biological Data, 3e © 2020 W. H. Freeman and Company The researchers also found that 11 of 12 participants showed improved accuracy in the exposed nostril after 21 days. Carry ou he hypothesis test using the level of significance a = 0.05 to test whether accuracy scores changed after 21 days in the expos ostrils of participants.

smell if exposed to the chemical repeatedly. Does this change in sensitivity happen in the nose or in the brain? Mainland et a (2002) exposed one nostril of each of 12 non-detector participants to androstenone for short periods every day for 21 days. The other nostril was plugged and had humidified air flow to prevent androstenone from entering. After the 21 days, the researchers found that 10 of 12 participants had improved androstenone-detection accuracy in the plugged nostril, whereas two had reduced accuracy. This suggested that increases in sensitivity to androstenone happen in the brain rather than the nostril since the epithelia of the nostrils are not connected. The authors conducted a statistical hypothesis test of whether accuracy, in fact, did change. Let p refer to the proportion of non-detectors in the population whose accuracy scores improve after 21 days. Under the null hypothesis, p = 0.5 (as many participants should improve as deteriorate in their accuracy after 21 days). The alternative hypothesis is that p ‡ 0.5 (the proportion of participants increases or decreases after 21 days). The accompanying figure shows the null distribution for the number of participants out of 12 having an improved accuracy score The probability of each outcome is given above the bars. Probability 0.25 0.20 0.15 0.10- 0.05 0.00 0.0002 0.003 0.016 0.054 0.121 0.193 0.226 0.193 0.121 0.054 0.016 0.003 0.0002 0 1 2 3 4 5 6 7 8 9 10 11 12 Number of participants improving Whitlock & Schluter, The Analysis of Biological Data, 3e © 2020 W. H. Freeman and Company The researchers also found that 11 of 12 participants showed improved accuracy in the exposed nostril after 21 days. Carry ou he hypothesis test using the level of significance a = 0.05 to test whether accuracy scores changed after 21 days in the expos ostrils of participants.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

please answer this question! 

About 30% of people cannot detect any odor when they sniff the steroid androstenone, but they can become sensitive to its smell if exposed to the chemical repeatedly. Does this change in sensitivity happen in the nose or in the brain? Mainland et al. (2002) exposed one nostril of each of 12 non-detector participants to androstenone for short periods every day for 21 days. The other nostril was plugged and had humidified air flow to prevent androstenone from entering. After the 21 days, the researchers found that 10 of 12 participants had improved androstenone-detection accuracy in the plugged nostril, whereas two had reduced accuracy. This suggested that increases in sensitivity to androstenone happen in the brain rather than the nostril since the epithelia of the nostrils are not connected. The authors conducted a statistical hypothesis test of whether accuracy, in fact, did change. Let p refer to the proportion of non-detectors in the population whose accuracy scores improved after 21 days. Under the null hypothesis, p = 0.5 (as many participants should improve as deteriorate in their accuracy after 21 days). The alternative hypothesis is that p = 0.5 (the proportion of participants increases or decreases after 21 days). The accompanying figure shows the null distribution for the number of participants out of 12 having an improved accuracy score. The probability of each outcome is given above the bars. Probability 0.25 0.20 0.15 0.10 0.05 0.00 T 0.0002 0.003 0.016 0.054 0.121 0.193 0.226 0.193 0.121 0.054 0.016 0.003 0.0002 0 1 2 3 4 5 6 7 8 9 10 11 12 Number of participants improving Whitlock & Schluter, The Analysis of Biological Data, 3e © 2020 W. H. Freeman and Company The researchers also found that 11 of 12 participants showed improved accuracy in the exposed nostril after 21 days. Carry out the hypothesis test using the level of significance a = 0.05 to test whether accuracy scores changed after 21 days in the exposed nostrils of participants. What is the P-value for this new test?
Transcribed Image Text:About 30% of people cannot detect any odor when they sniff the steroid androstenone, but they can become sensitive to its smell if exposed to the chemical repeatedly. Does this change in sensitivity happen in the nose or in the brain? Mainland et al. (2002) exposed one nostril of each of 12 non-detector participants to androstenone for short periods every day for 21 days. The other nostril was plugged and had humidified air flow to prevent androstenone from entering. After the 21 days, the researchers found that 10 of 12 participants had improved androstenone-detection accuracy in the plugged nostril, whereas two had reduced accuracy. This suggested that increases in sensitivity to androstenone happen in the brain rather than the nostril since the epithelia of the nostrils are not connected. The authors conducted a statistical hypothesis test of whether accuracy, in fact, did change. Let p refer to the proportion of non-detectors in the population whose accuracy scores improved after 21 days. Under the null hypothesis, p = 0.5 (as many participants should improve as deteriorate in their accuracy after 21 days). The alternative hypothesis is that p = 0.5 (the proportion of participants increases or decreases after 21 days). The accompanying figure shows the null distribution for the number of participants out of 12 having an improved accuracy score. The probability of each outcome is given above the bars. Probability 0.25 0.20 0.15 0.10 0.05 0.00 T 0.0002 0.003 0.016 0.054 0.121 0.193 0.226 0.193 0.121 0.054 0.016 0.003 0.0002 0 1 2 3 4 5 6 7 8 9 10 11 12 Number of participants improving Whitlock & Schluter, The Analysis of Biological Data, 3e © 2020 W. H. Freeman and Company The researchers also found that 11 of 12 participants showed improved accuracy in the exposed nostril after 21 days. Carry out the hypothesis test using the level of significance a = 0.05 to test whether accuracy scores changed after 21 days in the exposed nostrils of participants. What is the P-value for this new test?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 11 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS