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A variable is normally distributed with: mean = 50 and
A variable is normally distributed with: mean = 50 and standard deviation = 5 . What percent of the data values lie in between 40 and 60? … read more
rajeevanpillai
rajeevanpillai
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Master's Degree
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Reginald Brown, an inspector from the Department of Weights
Reginald Brown, an inspector from the Department of Weights and Measures, weighed 15 eighteen-ounce cereal boxes of corn flakes. He found their mean weight to be 17.8 ounces with a standard deviation … read more
Kimberley Wright
Kimberley Wright
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Reginald, an inspector from the Department of Weights and
Reginald Brown, an inspector from the Department of Weights and Measures, weighed 15 eighteen-ounce cereal boxes of corn flakes. He found their mean weight to be 17.8 ounces with a standard deviation … read more
Kofi
Kofi
Ph.D.
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How do i calculate the probability that the z value <
How do i calculate the probability that the z value < 0.25587 assuming that the data is normally distributed. … read more
Sandhya
Sandhya
Master's Degree
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1. On the average, there are 500 mg of aspirin in an “Extra
1. On the average, there are 500 mg of aspirin in an “Extra Strength” aspirin tablet. Suppose the random variable assigning amount of aspirin in a tablet is normally distributed with standard deviatio… read more
Nathan Weaver
Nathan Weaver
Virtual Mathematics Teacher
Master's Degree
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I need help. I'm trying to determine the likelihood of a
I need help. I'm trying to determine the likelihood of a response in thresholds (ranges) given historical data. For example: On a survey that has a 100 data points, with a mean score of 60 and a stand… read more
Rajan.Sareen
Rajan.Sareen
Sr. Statistician
Master's Degree
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1. A math teacher gives two different tests to measure
1. A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 24 and a standard deviation of 4.5. Scores on the s… read more
Sandhya
Sandhya
Master's Degree
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Assume that the amount of cornflakes in a box is normally
assume that the amount of cornflakes in a box is normally distributed with a mean of 18oz and a standard deviation of 0.2oz. If the manufacturer produces 100,000 boxes, how many will contain less than… read more
GLENN GILONGOS
GLENN GILONGOS
Master of Mathematics
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Recently, the bowling scores of a certain bowler were normally
Recently, the bowling scores of a certain bowler were normally distributed with mean 201 and standard deviation 23.The best score is 299. Find the percentile that corresponds to this score, and explai… read more
Ryan
Ryan
Bachelor's Degree
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1. The cashier service time at the local branch of the Rivertown
1. The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes. What is the probability that the service time: Is between 2 and 4 minu… read more
akch2002
akch2002
Master's Degree
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The following are the overall miles per gallon (MPG) of 2012
The following are the overall miles per gallon (MPG) of 2012 family sedans: 38 24 26 21 25 22 24 34 23 20 37 22 20 33 22 21 a. Construct a 95& confidence interval estimate for the population mean MPG … read more
akch2002
akch2002
Master's Degree
3,103 satisfied customers
The monthly incomes for 12 randomly selected people
13.) The monthly incomes for 12 randomly selected people, each with bachelor's degree in economics, are shown on the right: 4450.77 4596.43 4366.21 4455.62 4151.34 3727.06 4283.99 4527.57 4407.44 3946… read more
Ryan
Ryan
Bachelor's Degree
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Create an example probability distribution to the right in
Create an example probability distribution to the right in which the expected value is 15. You must have at least three different values for x. What are the values for the mean and standard deviation … read more
Chirag
Chirag
Master's Degree
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You are interested in the incomes of your customers. A sample
You are interested in the incomes of your customers. A sample of 100 customer incomes yields a standard deviation of $141,421 and a mean of $300,000: a. Determine the point estimate (3 points). b. Det… read more
Ryan
Ryan
Bachelor's Degree
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Find the critical value x2r based on the given information
Find the critical value x2r based on the given information sample size 5 and confidence level 98%… read more
Ryan
Ryan
Bachelor's Degree
4,665 satisfied customers
I. a. What percentage of the area of the standard normal distribution
I. a. What percentage of the area of the standard normal distribution is between z = -2.00 and z = +2.00? How do you know this? b. Find the following: P(z > 2.43) II. 1. A set of 50 data values has… read more
Chirag
Chirag
Master's Degree
10,329 satisfied customers
The book is called statistics unplugged by Sally Caldwell 3rd
The book is called statistics unplugged by Sally Caldwell 3rd Edition. 1. Explain how you work to find the probability that a randomly selected person has score between -1.2 and 1.2 by using the table… read more
Ryan
Ryan
Bachelor's Degree
4,665 satisfied customers
Selecting a distribution for inferences on the population mean Suppose
Selecting a distribution for inferences on the population mean Suppose that we want to estimate the mean reading speed of second graders. The random sample of students' reading speeds we choose has a … read more
Scott
Scott
MIT Graduate
Master's Degree
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