The mean score for freshmen on an aptitude test at a certain college is540, with a standard deviation of 50. Assume the means to be measuredto any degree of accuracy. What is the probability that two groupsselected at random, consisting of 32 and 50 students, respectively, willdiffer in their mean scores by less than 5 points.0.3400None of these (Place answer in solution paper)0.3300O 0.6700O 0.6600

We want to find the probability by using standard normal distribution table

Answered: The mean score for freshmen on an…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean 2967 and standard deviation 539. One randomly selected customer is observed to see how many calories X that customer consumes. Round all answers to 4 decimal places where possible.b. Find the probability that the customer consumes less than 2600 calories. c. What proportion of the customers consume over 3342 calories? d. The Piggy award will given out to the 2% of customers who consume the most calories. What is the fewest number of calories a person must consume to receive the Piggy award? calories. (Round to the nearest calorie)
The number of ants per acre in the forest is normally distributed with mean 42,000 and standard deviation 12,221. Let X = number of ants in a randomly selected acre of the forest. Round all answers to 4 decimal places where possible. b. Find the probability that a randomly selected acre in the forest has fewer than 32,793 ants. c. Find the probability that a randomly selected acre has between 46,676 and 51,692 ants. d. Find the first quartile. ? ants (round your answer to a whole number) PLEASE ANSWER THE 3 SUBS B, C AND D
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