Inferences for Mu
When running a 2-Sample T Test, how do we know if we need to use the Pooled Assumption?
If sigma 1 equals sigma 2
What are the appropriate chi-square values to use when creating a 90% C.I. for sigma from a sample of 35?
18.493 and 43.773
What is the name of the sample statistic that we use to make inferences about p?
p-hat
If we run a hypothesis test and get a pvalue of 0.08, at what significance level would we reject the null Hypothesis?
10%
Given the following information, find the appropriate chi-square critical value.
H_a:sigma>12
n=25 alpha=.05
36.415
What test would you run on the calculator if you were comparing two different population proportions?
2-PropZTest
Name the 4 different distributions that we've used for statistical inference in Stat 2.
Z, T, Chi-Square, and F
Question 4a - Use 90% Confidence
https://drive.google.com/file/d/1_y8JAv7kvQIb-vGMNIC7f28EF6wKMcqM/view
(-25.9, -13.5)
We are 90% confident that the 7th graders spent from 13.5 to 25.9 minutes more on homework than the 6th graders.
(.36, .42)
We are 95% confident that the proportion of all United States adults who would respond "Make some major changes" is between 36 and 42 percent.
Type 1 - They think that p is greater than .05 and decide to represent the owners but lose money because it is not actually greater than .05
Type 2 - They think that p is not greater than .05 and don't represent the owners but will lose out on a chance to make money because it is greater than .05.