You will need your ticker code (company abbreviation) for stock prices for this question. Use your ticker code to obtain the closing prices for the following two time periods to obtain two data sets:

March 2, 2020 to March 16, 2020 Data set A

February 16, 2020 to February 28, 2020 Data set B

Take the closing prices from data set B and add 0.5 to each one of them.

Treat data sets A and B as hypothetical sample level data on the weights of newborns whose parents smoke cigarettes (data set A), and those whose parents do not (data set B).

Conduct a hypothesis test to compare the variances between the two data sets.

Conduct a hypothesis to compare the means between the two data sets. Selecting the assumption of equal variance or unequal variance for the calculations should be based on the results of the previous test.

Calculate a 95% confidence interval for the difference between means.

2. Take data sets A and B and delete duplicated values such that each value is unique even when pooling the two data sets. Just like with the previous problem, treat data sets A and B as hypothetical data on the weights of children whose parents smoke cigarettes, and those whose parents do not, respectively. Conduct a Wilcoxon Rank-Sum test on the data.

3. Take the mean and standard deviation of data set A calculated in problem 1 and assume that they are population parameters (? and ?) known for the variable fish length in a population of rainbow trouts in the Coldwater River. Imagine that data set B is a sample obtained from a different population in Red River (Chapter 6 problem!).

Conduct a hypothesis test to see if the mean fish length in the Red River population is different from the population in Coldwater River.

Conduct a hypothesis test to see if the variance in fish length is different in the Red River population compared to the variance in the Coldwater population.

4. An experimental drug is being tested to see if it reduces blood sugar in patients suffering from diabetes. Each of seven patients will receive both the placebo and the experimental drugs (treatments given a month apart) for a two week period. The maximum blood sugar (measured every day) on the second week of treatment is recorded. The data obtained from

Date Mar 15, 2021 Mar 12. 2021 Mar 11. 2021 Mar 10, 2021 Mar 09, 2021 Mar 08. 2021 Mar 05. 2021 Mar '04, 2021 Mar 03, 2021 Mar 02, 2021 Mar '01. 2021 Data set B 0050' 30.54 29.7? 29.57 23.98 30.02 29.48 29.39 28.60 28.88 28.40 23.48 Data set A Date Close Feb 27, 2020 25.92 Feb 26, 2020 26.34 Feb 25, 2020 25.86 Feb 24, 2020 26.04 Feb 21, 2020 27.05 Feb 20, 2020 27.33 Feb 19, 2020 27.08 Feb 18, 2020 27.05Patient Placebo Exp. Drug Difference 125 127 -2 130 100 30 133 110 23 YOUAWNH 122 87 35 150 102 48 156 140 16 145 146 -1 Mean 137.3 116.0 21.3 SD 13.1 22.1 18.5