In a sample of 138 tables, the average height was found to be 34.3in. with a variance of 0.7. Give a point estimate for the population variance of the height of the tables. Round your answer to two decimal places, if necessary.

0.70.

Step-by-step explanation:

Given : For the sample of  138 tables, the average height was found to be 34.3in. with a variance of 0.7.

It means the sample variance  () is 0.70.

Since , we know that the sample variance is the best point estimate of the population variance in a statistical study.

Therefore ,  a point estimate for the population variance of the height of the tables would be 0.70.

Hence, the correct answer is 0.70.

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b