( PLEASE SHOW ALL YOUR WORK)
You will need your ticker code (company abbreviation) for stockprices for this question. Use your ticker code to obtain theclosing prices for the following two time periods to obtain twodata sets:
March 2, 2019 to March 16, 2019
Data set A
February 16, 2019 to February 28, 2019
Data set B
Take the closing prices from data set B and add 0.5 to each oneof them. Treat data sets A and B as hypothetical sample level dataon the weights of newborns whose parents smoke cigarettes (data setA), and those whose parents do not (data set B).
a) Conduct a hypothesis test to compare the variances betweenthe two data sets.
b) Conduct a hypothesis to compare the means between the twodata sets. Selecting the assumption of equal variance or unequalvariance for the calculations should be based on the results of theprevious test.
c) Calculate a 95% confidence interval for the differencebetween means
| | A | B |
| | 84.09 | 83.74 |
| | 83.22 | 84.45 |
| | 82.35 | 84.37 |
| | 83.39 | 83.77 |
| | 82.65 | 84.66 |
| | 82.09 | 85.5 |
| | 82.49 | 85.35 |
| | 82.19 | 86.29 |
| | 82.32 | |
| | 82.4 | |
| | 83.06 | |
| Mean | 82.75 | 84.76625 |
| SD | 0.617770184 | 0.887612166 |
