A student score 78 on his statistics test where the average score was 90 the the standard deviation was 7.
what is the variance and standard deviation for the group of numbers: 28 27 48 52 77 29 30 31 60
How many grams of AgNo3 are required to make 25 mL of a .80M solution?
On a map, the length of a nature-center trail is 8.2 centimeters. If the scale is 3 centimeters to 24 kilometers, what is the actual length of the trail.
when two fair dice are rolled find the probability that the sum is even and greater than 8
Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,225 per hour and a standard deviation of $220. What is the operating cost for the lowest 5 percent of the airplanes?
The closing price of Schnur Sporting Goods, Inc., common stock is uniformly distributed between $17 and 35 per share. What is the probability that the stock price will be: More than $31? Less than or equal to $23?
A normal population has a mean of 21 and a standard deviation of 5. Compute the z value associated with 24 What proportion of the population is between 21 and 24? What proportion of the population is less than 18?