A boat capsized and sank in a lake. Based on an assumption of a mean weight of 134 Ib, the boat was rated to carry 70 passengers (so the load limit was 9,380 Ib). After the boat sank, the assumed mean weight for similar boats was changed from 134 Ib to 170 lb. Complete parts a and b below. a. Assume that a similar boat is loaded with 70 passengers, and assume that the weights have a mean weight greater than 134 Ib. people are normally distributed with a mean of 177.6 lb and a standard deviation of 39.9 lb. Find probability that the boat is overloaded because the 70 passengers The probability is (Round to four decimal places as needed.) b. The boat was later rated to carry only 15 passengers, and the load limit was changed to 2,550 Ib. Find the probability that the boat is overloaded because the mean weight of the passengers is greater than 170 (so that their total weight is greater than the maximum capacity of 2,550 lb). The probability is (Round to four decimal places as needed.) Do the new ratings appear to be safe when the boat is loaded with 15 passengers? Choose the correct answer below. O A. Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe. O B. Because there is a high probability of overloading, the new ratings appear to be safe when the boat is loaded with 15 passengers. OC. Because there is a high probability of overloading, the new ratings do not appear to be safe when the boat is loaded with 15 passengers. O D. Because 177.6 is greater than 170, the new ratings do not appear to be safe when the boat is loaded with 15 passengers.
A boat capsized and sank in a lake. Based on an assumption of a mean weight of 134 Ib, the boat was rated to carry 70 passengers (so the load limit was 9,380 Ib). After the boat sank, the assumed mean weight for similar boats was changed from 134 Ib to 170 lb. Complete parts a and b below. a. Assume that a similar boat is loaded with 70 passengers, and assume that the weights have a mean weight greater than 134 Ib. people are normally distributed with a mean of 177.6 lb and a standard deviation of 39.9 lb. Find probability that the boat is overloaded because the 70 passengers The probability is (Round to four decimal places as needed.) b. The boat was later rated to carry only 15 passengers, and the load limit was changed to 2,550 Ib. Find the probability that the boat is overloaded because the mean weight of the passengers is greater than 170 (so that their total weight is greater than the maximum capacity of 2,550 lb). The probability is (Round to four decimal places as needed.) Do the new ratings appear to be safe when the boat is loaded with 15 passengers? Choose the correct answer below. O A. Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe. O B. Because there is a high probability of overloading, the new ratings appear to be safe when the boat is loaded with 15 passengers. OC. Because there is a high probability of overloading, the new ratings do not appear to be safe when the boat is loaded with 15 passengers. O D. Because 177.6 is greater than 170, the new ratings do not appear to be safe when the boat is loaded with 15 passengers.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Transcribed Image Text:A boat capsized and sank in a lake. Based on an assumption of a mean weight of 134 Ib, the boat was rated to carry 70 passengers (so the load limit was 9,380 Ib). After the boat sank, the assumed mean weight for similar boats was changed from 134 lb to
170 lb. Complete parts a and b below.
a. Assume that a similar boat is loaded with 70 passengers, and assume that the weights of people are normally distributed with a mean of 177.6 lb and a standard deviation of 39.9 Ib. Find the probability that the boat is overloaded because the 70 passengers
have a mean weight greater than 134 Ib.
The probability is
(Round to four decimal places as needed.)
overloaded because the mean weight of the passengers is greater than 170 (so that their total weight is greater than the
b. The boat was later rated to carry only 15 passengers, and the load limit was changed to 2,550 lb. Find the probability that the boat
maximum capacity of 2,550 Ib).
The probability is
(Round to four decimal places as needed.)
Do the new ratings appear to be safe when the boat is loaded with 15 passengers? Choose the correct answer below.
O A. Because the probability of overloading is lower with the new ratings than with the old ratings, the new ratings appear to be safe.
O B. Because there is a high probability of overloading, the new ratings appear to be safe when the boat is loaded with 15 passengers.
OC. Because there is a high probability of overloading, the new ratings do not appear to be safe when the boat is loaded with 15 passengers.
O D. Because 177.6 is greater than 170, the new ratings do not appear to be safe when the boat is loaded with 15 passengers.
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