# statistics

posted by .

The amount that airlines speed on food per passenger is normally distributed with means \$8.00 and standard deviation \$2.00. What is the probability that a randomly selected airline spends more than \$12.50?

• statistics -

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

## Similar Questions

1. ### Statistics

The mean amount spent by a family on food per month is \$500 with a standard deviation of \$75. Assuming that the food costs are normally distributed, what is the probability that a family spends more than \$410 per month?
2. ### statistics

1. The on-campus housing costs for a semester at a state university are Normally distributed with a mean of \$1553 and a standard deviation of \$329. (a) What is the distribution of the mean on-campus housing cost for a semester at this …
3. ### math

The mean amount spent by a family of four on food per month is \$550 with a standard deviation of \$85. Assuming that the food costs are normally distributed, what is the probability that a family spends less than \$410 per month?
4. ### stats

The amount that airlines speed on food per passenger is normally distributed with means \$8.00 and standard deviation \$2.00. What is the probability that a randomly selected airline spends more than \$12.50?
5. ### statistics

Scores on a visual perception test are normally distributed with a mean of 2020 and a standard deviation of 250. a)If one subject is randomly selected and tested, find the probability of a score greater than 1800 b)if 50 subjects are …
6. ### stats.

The amount that airlines spend on food per passenger is normally distributed with mean \$8.00 and standard deviation \$2.00. What is the probability that a randomly selected airline spends more than \$12.50.
7. ### Math

The average amount customers at a certain grocery store spend yearly is \$784.39. Assume the variable is normally distributed. If the standard deviation is \$76.15, find the probability that a randomly selected customer spends between …
8. ### math

Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. a. What is the probability that a randomly selected applicant scores between 425 and 575?
9. ### Math- Prob Stat

The amount of time a student spends completing homework per week their senior year is normally distributed with a mean of 5 hours and a standard deviation of 1.4 A. Find the probability a randomly selected student spends less than …
10. ### Statistics

The amount of time the university professors devote to their jobs per week is normally dis- tributed with a mean of 52 hours and a standard deviation of 8 hours. (a) What is the probability that a professor works for more than 56 hours …

More Similar Questions