4/6=0.6666666667
0.6666666667×39=26 millimeters
Answer:
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 67
Variance = 3.85
We have to find 80% confidence interval for the population variance of the weights.
Degree of freedom = 67 - 1 = 66
Level of significance = 0.2
Chi square critical value for lower tail =
Chi square critical value for upper tail =
80% confidence interval:
Putting values, we get,
Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.
8 times 8 is 64.
The square root of 64 is 8.
48 centimeters is the answer
<span>35, 145 and 145 degrees is the answer</span>