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math 115
Let x be a continuous random variable that follows a normal distribution with a mean of 200 and a standard deviation 25. Find the value of x so that the area under the normal curve between ì and x is approximately 0.4798 and the
asked by louise on November 19, 2013 
Statistics
Standard Normanl Drill: A. Find the number z such that the proportion of observations that are less than z in a standard Normal distribution is 0.8. B. Find the number z such that 35% of all observations from a standard Normal
asked by Devon on September 10, 2007 
Statistics
A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12hour fast, the random variable x
asked by Alex on June 20, 2010 
Statistics
Using the standard normal distribution tables, the area under the standard normal curve corresponding to Z > –2.62 is a. 0.0044. b. 0.0047. c. 0.9953. d. 0.9956. The answer is D How do i find the answer on the Table C or just in
asked by Matt on September 23, 2008 
Statistics
Assume that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume the variable is normally distributed. If an individual is selected, find the probability
asked by Anonymous on February 12, 2017

stats
Given that z is a standard normal random variable, find z for each situation (to 2 decimals). 1.The area between z and z is 0.2128
asked by Anonymous on April 13, 2016 
statistics
Let x be a random variable that represents the length of time it takes a student to complete a takehome exam in Dr. Larson’s psychology class. After interviewing many students, it was found that x has an approximately normal
asked by Anonymous on November 16, 2011 
math
Let Z be the standard normal variable with μ = 26 and σ = 3.2. Find the value of P(24 < X < 34).
asked by Anonymous on April 19, 2020 
Math, statistics
Let z be the standard normal variable. Find z if z satisfies p(Z
asked by Lijim on November 16, 2019 
statistic
Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). 1. P(1.92 ≤ z ≤ 0.43) 2.P(0.57 ≤ z ≤ 1.24) 3.P(1.75 ≤ z ≤ 1.02)
asked by isaac newland on April 13, 2016 
STATISTICS
Consider a binomial random variable where the number of trials is 12 and the probability of success on each trial is 0.25. Find the mean and standard deviation of this random variable. I have a mean of 4 and a standard deviation
asked by John on June 10, 2010
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