The numbers of minutes that travellers arrives at the airport before their scheduled departure are approximately normally distributed with mean 80.5 and standard deviation 9.9. what proportion of travellers arrive at the airport more than 77.4 minutes before their departure? write only a number as your answer. round to 4 decimal places. do not write as a percentage.
Solution :
Given that ,
mean = = 80.5
standard deviation = = 9.9
P(x > 77.4) = 1 - P(x <77.4 )
= 1 - P[(x - ) / < (77.4 - 80.5) /9.9 ]
= 1 - P(z < -0.31)
Using z table,
= 1 -0.3783
=0.6217
The numbers of minutes that travellers arrives at the airport before their scheduled departure are approximately...
Question 19 (4 points) The numbers of minutes that travelers arrives at the airport before their scheduled departure are approximately normally distributed with mean 80.5 and standard deviation 9.9. What proportion of travelers arrive at the airport more than 65.0 minutes before their departure? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Answer Question 2014 points) Natural Gas bills in a certainty have 576.75. Assume...
Question 5 (5 points) Saved Suppose that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.5 and standard deviation 9.9. What proportion of women have blood pressure greater than 70.7 ? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage.
Departure Observation with Departure Times Date Departure Delay minutes WA JW, RW 136 Scheduled: 08:00; Actual: 07:541 137 Scheduled: 17:10Actual: 20:301 138 Scheduled 15:45; Act 11:44 139 Schedule: 07:50; Actual: 07:43 140 Scheduled 18:45; Actual: 22:23) 141 Scheduled: 03:50: Actual:09:17 142 Scheduled 12:00; Actual: 11:561 14 Scheduled 11:00; Actual: 10:53 144 Scheduled: 19:55; Actual: 20:19 165 Scheduled 11:00; Actual: 10:56 16h a 19. al 14.20 2007-12-04 2007-12-04 2007-12-04 2007-12-04 2007-12-04 2007-12-05 2007-12-05 2007-12-05 2007-12-05 2007-12-05 2007/12-05 -6 200 3 -7...
1. " The length of time a domestic flight must wait betiveen gate departure and takeoff axi at Boston's utes and a Logan International Airport is approximately normally distributed with a mean of 20 min standard deviation of 5 minutes. a. What is the probability that a plane must wait between 18 and 24 minutes before taxing for takeoff after leaving the gate? What is the probability a plane must wait between 22 and 30 minutes before taxing for takeoff...
Question 5 (5 points) Suppose that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.5 and standard deviation 9.9. What proportion of women have blood pressure greater than 76.4 ? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Answer Question 6 (5 points) The mean length of six-year-old rainbow trout in the Arolik River in Alaska is...
The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. What proportion of broilers weight between 1,500 and 1705 grams? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer:
In a recent study, the Centers for Disease Control reported that diastolic blood pressures of adult women in the U.S. are approximately normally distributed with a mean of 80.5 and standard deviation 9.9. Round all answers to 4 decimal places. a. What proportion of women have blood pressures lower than 70? b. Find the 30th percentile for blood pressures. C. Suppose a sample of 150 women is taken. What is the probability that the sample mean blood pressure would be...
In a recent study, the Centers for Disease Control reported that diastolic blood pressures of adult women in the U.S. are approximately normally distributed with a mean of 80.5 and standard deviation 9.9. Round all answers to 4 decimal places. a. What proportion of women have blood pressures lower than 70? b. Find the 30th percentile for blood pressures. C. Suppose a sample of 150 women is taken. What is the probability that the sample mean blood pressure would be...
A study of the time required for airplanes to land at a certain airport shows that the mean is 280 seconds with a standard deviation of 20 seconds. (The times are NOT normally distributed.) a) Find the mean and standard deviation of the sample mean for samples of size 36 . μ ¯ x = σ ¯ x = (Write your answer as a decimal, rounded to 2 decimal places.) b) For samples of size 36 , find the percentage...
Question 4 (1.1 points) The mean length of six-year-old rainbow trout in the Arolik River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. Assume these lengths are normally distributed. What proportion of six-year-old rainbow trout are less than 512 millimeters long? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage Your Answer: Answer Question 5 (1.1 points) The weights of broilers (commercially raised chickens)...