The Highway Safety Department wants to study the driving habits of individuals. A sample of 81 cars traveling on the highway revealed an average speed of 67 miles per hour with a standard deviation of 9 miles per hour
a. Compute the standard error of the mean.
b. Determine a 99% confidence interval estimate for the speed of all cars.
a. 1
b. 64.36 to 69.64 miles per hour (rounded)
You might also like to view...
A bond that makes a regular interest payment until maturity, at which time the face value is repaid is referred to as a
A. coupon bond. B. fixed-payment security. C. discount bond. D. perpetuity.
When you receive a job offer you want to accept, how soon should you reply?
A) Immediate B) By the close of business the day the offer was made C) Within 48 hours D) Within 3 days E) Within 5 days
A variable cost system is an accounting system where standards are set for each manufacturing cost element
Indicate whether the statement is true or false
Why is the ability to track purchases by song mix so important for Ferrante's clients?
A) Ferrante sells cheaper custom mixes than standard soundtracks available from other vendors. B) It allows the clients to shape the store brand with music. C) It gives them information on their competitor's products and services. D) It allows them to increase sales by playing the songs that stimulate purchases. E) It requires them to play certain songs no more than a few times in a shift.