Find the probability that the value of an item drawn at random from a normaldistribution with mean 20 and standard deviation 10 will be between :(a) 10 and 15 (b) – 5 and 10, and (ii) 15 and 25.The relevant extract of the Area Table (under the normal curve is given below) :0.50.19151.00.34131.50.43322.00.47722.50.4938

Answered: Image /qna-images/answer/c0cbb3e3-3fdd-4021-b6ec-93673da95b77.jpg

Answered: Find the probability that the value of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. The length of life of an instrument produced by a machine has a normal distribution with a mean of 12 months and standard deviation of 2 months. Find the probability that an instrument produced by this machine will last a. less than 7 months. b. between 7 and 12 months. For No. 1, draw a normal curve with the area corresponding to the probability shaded.
This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
6.2 The Standard Normal Distribution Table: Z-score and Probability In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 53.7 inches, and standard deviation of 5.1 inches. What is the probability that the height of a randomly chosen child is between 40.95 and 43.35 inches? Probability = (Use 4 decimal places.)
1 a.Find the positive z value such that 93% of the standard normal curve lies between –z and z. (Use 2 decimal places.) b.Assume that IQ scores are normally distributed, with a standard deviation of 15 points and a mean of 100 points. If 55 people are chosen at random, what is the probability that the sample mean of IQ scores will not differ from the population mean by more than 2 points? (use 3 decimal places) c.Assume the heights of men are normally distributed, with mean 68 inches and standard deviation 5 inches. If a random sample of twenty men is selected, what is the probability that the mean height is between 67 and 69 inches? (Use 3 decimal places.)
what is the standard normal curve that lies between -1.11 and 1.11
What is the test statistics? From the problem in the picture
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 4 days and a standard deviation of 1.9 days. Let X be the recovery time for a randomly selected patient. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 4 1.9 b. What is the median recovery time? days c. What is the Z-score for a patient that took 5.6 days to recover? d. What is the probability of spending more than 3.7 days in recovery? e. What is the probability of spending between 3.1 and 4.1 days in recovery? f. The 90th percentile for recovery times is days. Hint: Helpful videos: • Find a Probability 2 [+] Finding a Value Given a Probability 2 [+] Hint 2
An IQ score has a Normal distribution with mean 50 and standard deviation 5. Assume we want a sample of size 9. What proportion of sample means (of size 9) are less than 46.1? (Select nearest answer if your exact answer is not provided below). Group of answer choices 0.16 0.05 0.01 0.0013
0.002 incorrect
"For a normal distribution with a mean of m5 85 and a standard deviation of s5 20, find the proportion of the population corresponding to each of the following.a.Scores greater than 89b.Scores less than 72c.Scores between 70 and 100"
The weights of the chocolate in Hershey Kisses are normally distributed with a mean of 4.5338 g and a standard deviation of 0.1039 g. a. For the bell-shaped graph of the normal distribution of weights of Hershey Kisses, what is the area under the curve? b. What is the value of the median? a. For the bell-shaped graph of the normal distribution of weights of Hershey Kisses, what is the area under the curve? (Type an integer or a decimal. Do not round.) b. What is the value of the median? g (Round to four decimal places as needed.)
please answer d, e,f

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