Physics 132 Lab Prep HW Thickness of a Hair What is the measurement on the caliper in mm? Answer: 17.25 What is the measurement on the caliper in mm? Answer: 6.55 Which of the following is an appropriate null hypothesis for this alternative hypothesis? - Taking Prilaxene results in a increase in heart rate. b. Taking Prilaxene does not result in an increase in heart rate Which of the following is an appropriate alternative hypothesis for this null hypothesis? - Increased sodium consumption does not affect sweat production. a. Increased sodium consumption decreases sweat production c. Increased sodium consumption increases sweat production d. Increased sodium consumption results in a change in sweat production Answer: A,C,DHow many degrees of freedom are there for a two-sample t-test with a sample size of 7? Answer: 6 How many degrees of freedom are there for a one-sample t-test with a sample size of 3? Answer: 2 Which of the following t-values fall under p<=0.05 for two tailed t-test with 6 degrees of freedom? Use this link to T-distribution tables: http://www.statisticshowto.com/tables/t-distribution-table/ Select one or more: a. 2.69 c. 2.45 d. 3.10 Answer: A, C, D Which of the following t-values fall under p<=0.05 for two tailed t-test with 15 degrees of freedom? Use this link to T-distribution tables: http://www.statisticshowto.com/tables/t-distribution-table/ Select one or more: b. 2.32 c. 2.82 d. 3.10 Answer: B, C, D Which of the following hypotheses require a two-tailed t-test? b. Caffeine consumption has no effect on hair growth Which of the following hypotheses require a one-tailed t-test? Select one or more: a. Petting dogs does not result in lower exam scores c. Increased green gas emissions results in a higher global temperature Answer: A,
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