# 9 1 11 pts in the population new yorkers have an

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9.1.(11 pts) In the population, New Yorkers have an average of 2 pets in their homes,with a standard deviation of 1. I am interested in evaluating whether or not
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Chapter 3 / Exercise 5
Precision Machining Technology
Hoffman/Hopewell
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medical doctors differ from the population in regard to number of pets owned.Below is data from 9 doctors. Test this hypothesis using an alpha level of .01.# of pets010013211a.(2 pts) What is the appropriate test?z Testb.(1 pt) State the null hypothesis:Medical doctors do not have less petsthan the population.c.(1 pt) State the alternative hypothesis: Medical doctors have less pets thanthe population..d.(2 pts)Find the critical value: -2.33e.(2 pts)Calculate the obtained statistic:-3.003f.(2 pts)Make a decision:Reject the nullg.(1 pt) What does your decision mean?Medical doctors do have less petsthan the population.10.2.(11 pts) A doctor believes that the babies of smokers have lower birth weightsthan the average baby. It is well-known that the average newborn weights 7.4lbs,with a standard deviation of 1lb. The doctor collects data from 15 self-reportedsmokers who recently gave birth at a local hospital. He calculates their meanbaby birth weight to be 6.2lbs. Test the hypothesis that babies of smokers havelower birth weights than the average newborn using an alpha level of .05.a.(2 pts) What is the appropriate test?Z Testb.(1 pt) State the null hypothesis:Babies of smokers do not have lowerbirth weights than the average baby.c.(1 pt) State the alternative hypothesis:Babies of smokers have lowerbirth weights than the average baby.d.(2 pts) Find the critical value:-1.65e.(1 pt) Calculate the obtained statistic:-4. 62f.(2 pts) Make a decision: Reject the null.g.(1 pts) What does your decision mean?That babies of smokersdo havelower birth weights than average babies.
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Term
Spring
Professor
MARTINEZ-PONS
Tags
Null hypothesis, pts, Statistical hypothesis testing, Danielle Mizrahi
##### We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
The document you are viewing contains questions related to this textbook.
Chapter 3 / Exercise 5
Precision Machining Technology
Hoffman/Hopewell
Expert Verified