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Math 215 SLA Room - Shared screen with speaker view
Julius Ngwa
46:35
The National Health and Nutrition Examination Surveys (NHANES) are surveys that are designed to assess the health and nutritional status of adults and children in the U.S. According to a recent NHANES survey, the mean height of adult men in the U.S. is 69.7 inches, with a standard deviation of 3 inches. A sociologist believes that taller men may be more likely to be promoted to positions of leadership, so the mean height μ of male business executives may be greater than the mean height of the entire male population. A simple random sample of 100 male business executives has a mean height of 69.9 in. Assume that the standard deviation of male executive heights is σ = 3 inches. Can we conclude that male business executives are taller on the average than the general male population at the α = 0.05 level?
Julius Ngwa
49:00
Taller == Greater Than
Julius Ngwa
52:41
Z = 0.667
Julius Ngwa
52:50
P-value = 0.252
Julius Ngwa
54:59
A computer software vendor claims that a new version of their operating system will crash less than six times per year on average. A system administrator installs the operating system on a random sample of 41 computers. At the end of a year, the sample mean number of crashes is 7.1, with a standard deviation of 3.6. Can you conclude that the vendor’s claim is false? Use the α = 0.05 significance level.
Julius Ngwa
59:58
t = 1.956
Julius Ngwa
01:00:05
p = .9713
Grace's Laptop
01:03:11
Grace Peyton
April Harkovitch
01:03:18
April Harkovitch
Jeremy D
01:03:20
Jeremy Delong
Leticia Huerta
01:03:27
Leticia Huerta
Sherri Clevenger
01:08:07
Sherri Clevemger
Ingrid Polanco
01:18:19
Ingrid Polanco
Julius Ngwa
01:18:24
Z = 3.131
Julius Ngwa
01:18:41
p = .00087
Julius Ngwa
01:24:22
Z = .80
Julius Ngwa
01:24:26
p = .211
Grace's Laptop
01:38:15
Thank you
Sherri Clevenger
01:38:20
Thank you
Jeremy D
01:38:33
Thank you!