# math

in a distribution of 160 values with a mean of 72,at least 120 fall within the interval 67-77. approximately what percentage of values should fall in the interval 62-82? use chebyshev's formula.

1. 👍 0
2. 👎 0
3. 👁 463
1. S= 2.5

1. 👍 0
2. 👎 0
2. S= 2

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Science

_[blank]_ show the distribution and frequency for a set of values. _[blank]_ is how the values are spread out or grouped, and _[blank]_ is how often a value occurs in a set of numbers. Histograms; distribution; frequency Scatter

asked by dianni on November 6, 2018
2. ### Analytical Chemistry

Calculate the pH at the equivalence point for the titration of 0.160 M methylamine (CH3NH2) with 0.160 M HCl. The Kb of methylamine is 5.0× 10–4. Methylamine is a weak base and reacts with HCl to give the methylammonium ion.

asked by Sam on February 27, 2013
3. ### stat

Which of the following statements is true about the t-distribution with k degrees of freedom? i. the t-distribution is symmetric ii. the t-distribution with k degrees of freedom has a smaller variance than the t-distribution with

asked by Anonymous on May 2, 2007
4. ### math

The Davidson family wants to expand its rectangular patio, which currently measures 15 ft by 12 ft. They want to extend the length and width the same amount to increase the total area of the patio by 160 ft2. Which quadratic

asked by joe on April 29, 2016
1. ### statistics

For a t distribution with 16 degrees of freedom, find the area, or probability, in each region. a. To the right of 2.120. (Use 3 decimals.) b. To the left of 1.337. (Use 2 decimals.) c. To the left of -1.746. (Use 2 decimals.) d.

asked by Vanessa on April 21, 2014
2. ### stats need help

If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores will not be the same as the distribution of the original data. True or False?

asked by Josh on July 6, 2017
3. ### Economics

7. Suppose there are two possible income distributions in a society of ten people. In the first distribution, nine people have incomes of \$30,000 and one person has an income of \$10,000. In the second distribution, all ten people

asked by Sarah on March 8, 2007
4. ### Statistics

As the degrees of freedom for the t-distribution increase, the distribution approaches the value of zero for the mean. the t-distribution. the normal distribution. the F distribution.

asked by What? on October 26, 2012
1. ### Statistics

The distribution of scores on a test is mound-shaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which of the following is most likely to be the standard deviation of the distribution? 3, 1,

asked by MJ on March 12, 2012
2. ### Statistics

An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before they failed is 19.0 hours. The distribution of the lives approximated a normal distribution. The

asked by Ryan on April 11, 2014
3. ### Math probability

Suppose x is random variable with normal distribution (u,sigma^2) distribution and p(x

asked by Star on June 20, 2018
4. ### statistics

The respiratory rate per minute in newborns varies according to a distribution that is approximately Normal with mean 50 and standard deviation 5. The proportion of observations from a standard Normal distribution that take values

asked by Jen on July 9, 2013