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22.3 E-cigarettes and smoking cessation, continued. Excercise 22.1 describes an experiment comparing three approaches for quitting smoking.  a) state the null and alternative hypothesis that are appropriate for the study's objective. b) if we wanted to compared the treatments two at a time, how many two-sample z tests would be required? Explain why we should run one overall hypothesis test rather than all these two-sample tests.

22.3 E-cigarettes and smoking cessation, continued. Excercise 22.1 describes an experiment comparing three approaches for quitting smoking.  a) state the null and alternative hypothesis that are appropriate for the study's objective. b) if we wanted to compared the treatments two at a time, how many two-sample z tests would be required? Explain why we should run one overall hypothesis test rather than all these two-sample tests.

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
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22.3 E-cigarettes and smoking cessation, continued. Excercise 22.1 describes an experiment comparing three approaches for quitting smoking. 
a) state the null and alternative hypothesis that are appropriate for the study's objective.

b) if we wanted to compared the treatments two at a time, how many two-sample z tests would be required? Explain why we should run one overall hypothesis test rather than all these two-sample tests. 

ing or not). Each aphid only once. introduced, the the their land- Researchers placed on a at cen- 22.2 Pea aphids, are wingless, 22.1 E-cigarettes and smoking cessation. Electronic cigarettes (e-cigarettes) are battery-operated devices that can deliver nicotine and other chemicals in water vapor instead of smoke. They are a relatively recent invention with little scientific evaluation, yet some people believe that e-cigarettes could help smokers who want to quit smoking. Researchers in New Zealand randomly assigned 657 adult smokers wanting to quit to three treatment groups: nicotine patches, nicotine e-cigarettes, and placebo e-cigarettes. Smoking abstinence at the end of the study was assessed biochemically for all participants with a breath analyzer. The published research reports that, "at 6 months, verified abstinence was 7.3% (21 of 289) with nicotine e-cigarettes, 5.8% (17 of 295) with patches, and 4.1% (three of 73) with placebo »2 e-cigarettes." (a) Organize the study findings in the following two-way table of counts. Add the group totals to your table. ... Smoking status at six months Treatment group Verified abstinence Non-abstinent Total Nicotine e-cigarettes Patches Placebo e-cigarettes (b) Now organize the cited percents into a similar two-way table. Are these per- cents part of the conditional distribution of abstinence, given treatment group, or are they part of the conditional distribution of treatment, given abstinence sta- tus? What do they suggest about the relationship between treatment assigned and abstinence outcome? Aphid righting behavior. Pea aphids, Acyrthosiphon pisum, are small, wingless, sap-sucking insects that live on plants. They evade predators (such as ladybugs) Dy dropping off the plants. A study examined the mechanism of aphid drops. Researchers placed aphids on a timeters, cm) above a surface covered with petroleum jelly. When a ladybug was ntroduced, the aphids dropped, and the petroleum jelly helped capture their land- ng posture (upright or not). Each aphid performed this experiment only once. Here are the findings: leaf positioned at four different heights (in cen-
Transcribed Image Text:ing or not). Each aphid only once. introduced, the the their land- Researchers placed on a at cen- 22.2 Pea aphids, are wingless, 22.1 E-cigarettes and smoking cessation. Electronic cigarettes (e-cigarettes) are battery-operated devices that can deliver nicotine and other chemicals in water vapor instead of smoke. They are a relatively recent invention with little scientific evaluation, yet some people believe that e-cigarettes could help smokers who want to quit smoking. Researchers in New Zealand randomly assigned 657 adult smokers wanting to quit to three treatment groups: nicotine patches, nicotine e-cigarettes, and placebo e-cigarettes. Smoking abstinence at the end of the study was assessed biochemically for all participants with a breath analyzer. The published research reports that, "at 6 months, verified abstinence was 7.3% (21 of 289) with nicotine e-cigarettes, 5.8% (17 of 295) with patches, and 4.1% (three of 73) with placebo »2 e-cigarettes." (a) Organize the study findings in the following two-way table of counts. Add the group totals to your table. ... Smoking status at six months Treatment group Verified abstinence Non-abstinent Total Nicotine e-cigarettes Patches Placebo e-cigarettes (b) Now organize the cited percents into a similar two-way table. Are these per- cents part of the conditional distribution of abstinence, given treatment group, or are they part of the conditional distribution of treatment, given abstinence sta- tus? What do they suggest about the relationship between treatment assigned and abstinence outcome? Aphid righting behavior. Pea aphids, Acyrthosiphon pisum, are small, wingless, sap-sucking insects that live on plants. They evade predators (such as ladybugs) Dy dropping off the plants. A study examined the mechanism of aphid drops. Researchers placed aphids on a timeters, cm) above a surface covered with petroleum jelly. When a ladybug was ntroduced, the aphids dropped, and the petroleum jelly helped capture their land- ng posture (upright or not). Each aphid performed this experiment only once. Here are the findings: leaf positioned at four different heights (in cen-
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