From a sample with nequals=20, the mean number of televisions per household is 4 with a standard deviation of 1 television. using chebychev's theorem, determine at least how many of the households have between 2 and 6 televisions.

There are atleast 15 households that have between 2 and 6 televisions.

Step-by-step explanation:

Since we have given that

n = 20

mean number of televisions per household = 4

Standard deviation = 1

we need to find the number of the households have between 2 and 6 television.

First we check the within numbers.

so, we can say that there are 2 television which is within numbers.

So, now, we will find the value of k:

Using the Chebychev's theorem, we get that

so, the number of the households would be

Hence, there are atleast 15 households that have between 2 and 6 televisions.

There are at least 15 households that have between 2 and 6 televisions and this can be determined by using Chebychev's Theorem.

Given :

From a sample with n equals 20, the mean number of televisions per household is 4 with a standard deviation of 1 television.

In order to determine the number of households that have between 2 and 6 televisions, first check:

So, from the above calculation, it can be said that there are 2 television which is within the numbers.

Now, the value of k is given by the formula:

k = 2

Now, using Chebychev's Theorem.

So, the total number of households is:

= 15

Therefore, there are at least 15 households that have between 2 and 6 televisions.

For more information, refer to the link given below:

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45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.