Suppose that samples of size n = 25 are selected at random from a normal population with mean 100 and standard deviation 10.What is the probability that the sample mean falls in the interval from ug – 2.00g to ug + 1.2og ?Express your answer to four decimal places (e.g. 0.9876).The probability is iStatistical Tables and ChareTextbook and Media

Given that X~N(μ= 100 , σ= 10 ) μ= 100 , σ= 10 , n= 25 Formula for Z-score Z=(X-μ)/σ

Answered: Suppose that samples of size n = 25 are…

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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A simple random sample of size n=30 is drawn from a population that is normally distributed. The sample mean is found to be 25 and the sample standard deviation is found to be 2. The claim is the population mean is different from 26 at 5% significance. Calculate the value of the test statistics? Round to 2 decimal places.
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 80 adults and find the mean of this sample is less than 95? 0.0125 0.9750 0.4875 0.9476
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A normal distribution has a mean of=100 with a SD= 20 . If one score is randomly selected from this distribution. What is the probability that the score will have a value between X=100 and X=130? NOTE: Using the z-score table attached
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A normal distribution has a mean of µ = 50 with σ = 30. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 50 and X = 80? Select one: a. 0.6826 b. 0.3413 c. 0.8413 d. 0.1587
A randomly selected sample of n = 55 individuals over 65 years old takes a test of memorization skills. The sample mean is x = 53, and the standard deviation is s = 6.9. Give the numerical value of the standard error of the mean, s.e. (Round your answer to two decimal places.) s.e.(x) =
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The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 20 adults and find the mean of this sample is less than 95? 0.1314 0.7372 0.3686 0.7098
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