IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Find the probability that this person has an IQ greater than 138. Round your answer to 4 decimals. P(IQ greater than 138) =

Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles per day. The mileage per day is distributed normally. Find the probability that a truck drives between 119 and 149 miles in a day. Round your answer to four decimal places.

Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. Click to view page 2 of the table. 95 120 The area of the shaded region is (Round to four decimal places as needed.)

please answer within 30 minutes.

You recorded the time in seconds it took for 8 participants to solve a puzzle. The times were: 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4. a. Find the meanb. Find the medianc. Write the 5-number summary for this data d. Find the standard deviation of this data

Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. Click to view page 2 of the table. 0.6 The indicated IQ score, x, is (Round to one decimal place as needed.) Enter your answer in the answer box. étv 4 MacBook Air F8 F9 F10 딤미 F3 F7 F4 F5 F6 F1 F2

find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

In a psychology class, 53 students have a mean score of 84.7 on a test. Then 24 more students take the test and their mean score is 75.6. What is the mean score of all of these students together? Round to one decimal place. mean of the scores of all the students =

The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 313 yards. The probability the golf ball travels further than 322 yards is 0.13. Find the probability a randomly selected golf ball travels between 304 yards and 322 yards. Express the answer as a decimal value rounded to the nearest hundredth.

The life of lightbulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a bulb is 600 hours. Find the probability of a bulb lasting for at most 640 hours. Round your answer to four decimal places