Asked Mar 14, 2019

A study indicates that the weights of adults are normally distributed with a mean ? of 140 lbs and a standard deviation ? of 25 lbs.

  1. What is the probability that a randomly selected adult weighs between 120 and 165 lbs?


Expert Answer

Step 1


Let X be the weight of adults. X follows normal distribution that has mean µ = 140 and the standard deviation σ = 25. An adult was randomly selected.

Step 2

The probability that a randomly selected adult weight between 120 and 165 is,

Step 3

The value P( X < 165 ) and the value of P( X < 120 ) can be found by the Excel formula, “=NORM.DIST(165,140,25,TRUE)” and “=NORM.DIST(...


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in




Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: The same media consultants decided to continue their investigation of the focal relationship between...

A: In this question, the statistical summary about three models represented by three equation has given...


Q: What does it mean when two variables are described as “positively correlated”?

A: In statistical analysis to measure the relation between two bivariate data, then if the change of a ...


Q: The land area of th estate of Texas is about 261,797 square miles. If in mid-2016 all the world's pe...

A: The land area of Texas is about 261,797 square miles.Total number of people in world is 7.4 billion....


Q: For frecuency distribution for us governor 2019.  Party.                     Frequency Democratic.  ...

A: Given question have more than three sub parts. According to our policies cannot answer more than thr...


Q: A simple random sample of 500 individuals provides 150 Yes responses. a. What is the point estimate ...

A: a.The required point estimate is:


Q: Find the standard deviation, s, of sample data summarized in the frequency distribution table given ...

A: Using the provided formula, the sample standard deviation of the provided frequency distribution is ...


Q: A university dean of students wishes to estimate the average number of hours students wish to spend ...

A: The formula for the sample size is as follows:


Q: Describe when a given distribution is a probability distribution.

A: Let us assume X be a random variable such that X connected with the outcome of a random experiment w...


Q: How do I run a the test of normality?  Assumptions of normality

A: Introduction:Several tests of normality exist, using which you can verify whether a particular data ...