Answer:
-2
Step-by-step explanation:
-3(2)+4
-6+4
-2
Answer:
Cool
Do you need help with anything or is it just a fact?
A =
5 and -5
-1 and 3
¹/₃B =
-6 and 12
-7 and 7
¹/₃B + A =
-1 and 7
-8 and 10
Answer:
i also needed help on this qustion and the awnser is
Step-by-step explanation:
C.
its the same problem and nothing changed besides the order↑≠≈
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.