A study compared tooth health and periodontal damage in a group of 40 young adult males with a tongue piercing and a control group of 50 young adult males without tongue piercing. Here are the summary statistics:GroupSample sizeMean of enamel cracksStDev of enamel cracksTongue piercing404.13.7No Tongue piercing501.31.6 One question of interest was whether individuals with tongue piercing had more enamel cracks, on average.Is there evidence at 1% level that young adult males with a tongue piercing have significantly more enamel cracks than young adult males without a tongue piercing? Which method will you use to perform the test? Choose the correct one.1-sample T test2-sample T test2-sample Z test.2-proportion Z test Which distribution will you use here? If you use t distribution, give the degree of freedom. If you use z or normal, give the mean and standard deviation.

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Description: A study compared tooth health and periodontal damage in a group of 40 young adult males with a tongue piercing and a control group of 50 young adult males without tongue piercing. Here are the summary statistics:GroupSample sizeMean of enamel cracks

Perform the 2-sample T test using the sample data. Null hypothesis: μ1=μ2 Alternative hypothesis:…

Answered: A study compared tooth health and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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A study compared tooth health and periodontal damage in a group of 40 young adult males with a tongue piercing and a control group of 50 young adult males without tongue piercing. Here are the summary statistics:

Group

Sample size

Mean of enamel cracks

StDev of enamel cracks

Tongue piercing

40

4.1

3.7

No Tongue piercing

50

1.3

1.6
One question of interest was whether individuals with tongue piercing had more enamel cracks, on average.

Is there evidence at 1% level that young adult males with a tongue piercing have significantly more enamel cracks than young adult males without a tongue piercing?

Which method will you use to perform the test? Choose the correct one.

1-sample T test
2-sample T test
2-sample Z test.
2-proportion Z test

Which distribution will you use here? If you use t distribution, give the degree of freedom. If you use z or normal, give the mean and standard deviation.

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