According to a study, the probability that a randomly selected teenager shopped at a mall at least once during a week was 0.65. Let X be the number of students in a randomly selected group of 50 that will shop at a mall during the next week. (a) Compute the expected value and standard deviation of X. (Round your answer to two decimal places.) Hint [See Example 5.] expected value standard deviation (b) Fill in the missing quantity. (Round your answer to the nearest whole number.) There is an approximately 2.5% chance that or more teenagers in the group will shop at the mall during the next week.
According to a study, the probability that a randomly selected teenager shopped at a mall at least once during a week was 0.65. Let X be the number of students in a randomly selected group of 50 that will shop at a mall during the next week. (a) Compute the expected value and standard deviation of X. (Round your answer to two decimal places.) Hint [See Example 5.] expected value standard deviation (b) Fill in the missing quantity. (Round your answer to the nearest whole number.) There is an approximately 2.5% chance that or more teenagers in the group will shop at the mall during the next week.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![According to a study, the probability that a randomly selected teenager shopped at a mall at least once during a week was 0.65. Let X be the number of students in a randomly selected group of 50
that will shop at a mall during the next week.
(a) Compute the expected value and standard deviation of X. (Round your answer to two decimal places.) Hint [See Example 5.]
expected value
standard deviation
(b) Fill in the missing quantity. (Round your answer to the nearest whole number.)
There is an approximately 2.5% chance that
or more teenagers in the group will shop at the mall during the next week.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F09e9cf9a-ad7f-4d35-ae0d-9eb2eb934f25%2F4e0c60a7-782b-4f43-a0c2-51080932e237%2Frght5v8_processed.png&w=3840&q=75)
Transcribed Image Text:According to a study, the probability that a randomly selected teenager shopped at a mall at least once during a week was 0.65. Let X be the number of students in a randomly selected group of 50
that will shop at a mall during the next week.
(a) Compute the expected value and standard deviation of X. (Round your answer to two decimal places.) Hint [See Example 5.]
expected value
standard deviation
(b) Fill in the missing quantity. (Round your answer to the nearest whole number.)
There is an approximately 2.5% chance that
or more teenagers in the group will shop at the mall during the next week.
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