A sample of 5 strings of thread is randomly selected and the following thicknesses are measured in millimeters. Give a point estimate for the population variance. Round your answer to three decimal places. 1.15,1.24,1.15,1.27,1.13

S² = 0.004

Step-by-step explanation:

Point estimate for the population variance is S²

S² = Sample Variance

∑ = Sum

= Term in data set

= Sample mean

n = Sample size

Sample mean ()  =

   =

   =

  = 1.188

    -                      

1.15  -   1.88  =       0.038        0.001444

1.24  -  1.88  =       0.052        0.002704

1.15  -  1.88   =       0.038        0.001444

1.27 -   1.88  =       0.082        0.006724

1.13  -   1.88  =       0.058        0.003364

5.94                      0.268          0.01568  

 =  0.0157

S² =   =  0.0039

S² = 0.004

29 mil

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40