According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches.  If Zsike is 67 inches tall, what is her z-score?

Debbie scored 71 points on her history test. The mean was 65 points and the standard deviation was 3 points. Harry scored 85 points on his architecture test. The mean was 70 points and the standard deviation was 10 points. Who scored relatively better on their test?

Seven students on an intramural team weigh 179 ​lb, 177 ​lb, 174 ​lb, 185 ​lb, 167 ​lb, 186 lb and 220 lb. What is the standard deviation of the weights of these​ students?

The mean or average number of days for someone age 12 and older in the US to smoke weed (if they smoke it at all) is 117.72 days per year.  The standard deviation is 131.60. What was the NORMAL number of days per year to smoke weed?

The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances that someone is earning more than $20 an hour?

Please answer B, C, & D.

A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. What proportion of people scores in the A range (90 or above)?

Cherise is interested in how her friends compare to the population for number of hours of television watched during a single week. She collects the data from 9 of her friends. The average for her friends is 28 hours, with a standard deviation of 9. She knows that the population mean is 34. What is the t statistic?

The mean annual wage per employee for each state and the District of Columbia for the year 2009 is $42,961 and the standard deviation is $7,884.75. The mean and standard deviation for Kentucky is $37,996 and $6,280.67. Using the data for all states including D.C., would a wage of $85,000 be unusual? Source: U.S. Bureau of Labor Statistics

What percentage of the widget Weights lie between 55 and 79 ounces when the mean is 61 and the standard deviation is 6 ?