This data is from a sample. Calculate the mean, standard deviation, and variance. x 20.5 41.9 14.7 14.9 24.4 35.6 31.7 Please show the following answers to 2 decimal places. Sample Mean =  Sample Standard Deviation =  Sample Variance =

An additional data value is added to a dataset. The new value is far below the rest of the data. The standard deviation will decrease when this new value is added into the dataset. True False Suppose a certain drug causes kidney problems in 10% of patients, and this drug is to be tested on 55 patients. Find the standard deviation for the number of patients who will experience kidney problems.  2.2249 5.5 5.0 2.345

Page 2 of 5 B. Organizing and Working with Data. 1. Find the z-score for the weight of a 155-pound woman. The mean weight of woman age 20 or older is 170.6 pounds with a standard deviation of 5.4 pounds. Round your answer to two decimal places.

Briefly explain the difference between the concepts of mean and median and the advantages and disadvantages of both measures. Which variable has a larger standard deviation? Discuss what this statistic measures and what it tells you about this variable. If someone’s score is 1 standard deviation above the mean for study hours (+1 Z score), how many hours do they study? If a friend is 1 standard deviation below the mean for work hours (-1 Z score), how many hours do they work?