Find the population variance and standard deviation for the following population. Round the answers to at least one decimal place. 17 7 18 7 24 21 The population variance is 42.6 . The population standard deviation is 6.5 .

Find the standard deviation for the group of data items. 5, 6, 7, 7, 8, 9 The standard deviation is (Simplify your answer. Round to two decimal places as needed.)

Question Help Suppose you buy a new car whose advertised mileage is 20 miles per gallon​ (mpg). After driving your car for several​ months, you find that its mileage is 15.5 mpg. You telephone the manufacturer and learn that the standard deviation of gas mileages for all cars of the model you bought is 1.21 mpg. a. Find the​ z-score for the gas mileage of your​ car, assuming the advertised claim is correct. b. Does it appear that your car is getting unusually low gas​ mileage?

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.

Just do 2 and 3 please.

This data is from a sample. Calculate the mean, standard deviation, and coefficient of variation. 18.1 19.6 13.2 31.4 14.1 45 10.2 35.4 36.5 Please show the following answers to 2 decimal places. Mean = Standard Deviation= % (Please enter a whole number.) %3D Coefficient of Variation