Completion times for a reading test are normally distributed with a mean time of 73.4 minutes and a standard deviation of 5.3 minutes.
a. Approximately what percent of the completion times is between 68.1 and 73.4 minutes?
Ans 2:
b. Approximately what percent of the completion times is at most 78.7 minutes?
Ans 2k
Sticker prices for new cars have a mean of $33,800 and a standard deviation of $2190. If your new car costs $26,354, use the z-score to compare your cost with the rest of the new cars.
Ans 3z=
Interpretation
2.
Completion times for a reading test are normally distributed with a mean time of 73.4 minutes and a standard deviation of 5.3 minutes.
a.
Approximately what percent of the completion times is between 68.1 and 73.4 minutes?
Ans 2a
b.
Approximately what percent of the completion times is at most 78.7 minutes?
Ans 2b
3.
Sticker prices for new cars have a mean of $33,800 and a standard deviation of $2190. If your new car costs $26,354, use the z-score to compare your cost with the rest of the new cars. Ans3z= Interpretation