a)
This is a normal distribution question with
P(150.0 < x < 211.0)=?
This implies that
P(150.0 < x < 211.0) = P(-0.2194 < z < 1.6928) = P(Z < 1.6928) - P(Z < -0.2194)
P(150.0 < x < 211.0) = 0.9547532286502147 - 0.4131692350141331
b)
n = 38
Since we know that
P(150.0 < x < 211.0)=?
This implies that
P(150.0 < x < 211.0) = P(-1.3527 < z < 10.435) = P(Z < 10.435) - P(Z < -1.3527)
P(150.0 < x < 211.0) = 1.0 - 0.08807574522652517
PS: you have to refer z score table to find the final probabilities.
Please hit thumps up if the answer helped you
An engineer is going to redesign an ejection seat for an airplane. The seat was designed...
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 211 lb. The new population of pilots has normally distributed weights with a mean of 158 lb and a standard deviation of 27.3 lb. a. If a pilot is randomly selected, find the probability that his weight is between 150 lb and 211 lb. The probability is approximately (Round to four decimal places as needed.)
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 211 lb. The new population of pilots has normally distributed weights with a mean of 157 lb and a standard deviation of 30.6 lb. a. If a pilot is randomly selected, find the probability that his weight is between 150 lb and 211 lb.
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 201 lb. The new population of pilots has normally distributed weights with a mean of 157 lb and a standard deviation of 27.5 lb.a. If a pilot is randomly selected, find the probability that his weight is between 150 lb and 201 lb.The probability is approximately _______ - Round to four decimal places as needed.)b. If 35...
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 120 lb and 161 lb. The new population of pilots has normally distributed weights with a mean of 129 lb and a standard deviation of 32.7 lb. a. If a pilot is randomly selected, find the probability that his weight is between 120 lb and 161lb. The probability is approximately _____ (Round to four decimal places as needed.) b. If...
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 201 lb. The new population of pilots has normally distributed weights with a mean of 155 lb and a standard deviation of 27.2 lb. a. If a pilot is randomly selected, find the probability that his weight is between 150 lb and 201 lb. The probability is approximately . (Round to four decimal places as needed.) b....
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 120 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 32,3 lb. a. If a pilot is randomly selected, find the probability that his weight is between 120 lb and 181 lb. The probability is approximately (Round to four decimal places as needed.) b. If...
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 140 lb and a standard deviation of 26.9 ib. a. If a pilot is randomly selected, find the probability that his weight is between 130 lb and 181 lb. The probability is approximately (Round to four decimal places as needed) b. 16...
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of 135 lb and a standard deviation of 30.1 lb a. If a pilot is randomly selected, find the probability that his weight is between 130 lb and 171 lb. The probability is approximately 0.4502 b. If 39 different pilots are randomly selected,...
An engineer is going to redesign an ejection seat for an airplane The seat was designed for pilots weighing between 140 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 146 lb and a standard deviation of 25.5 lb. a. If a pilot is randomly selected, find the probability that his weight is between 140 lb and 181 lb. The probability is approximately (Round to four decimal places as needed.)
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of 139 lb and a standard deviation of 30.1 lb. a. If a pilot is randomly selected, find the probability that his weight is between 130 lb and 171 lb. The probability is approximately (Round to four decimal places as needed.)