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Shashi S

Numerade Educator

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Educator Statistics

Numerade tutor for 4 years
102 Students Helped

Shashi's Quick Ask Videos

02:17
Intro Stats / AP Statistics


The owners of a transportation business in Alaska need to track
the average low temperatures to prepare supplies and make
adjustment to the schedule. The data set below contains the average
low temperature in April for 9 Alaskan cities. What is
the interquartile range of this data set?
5,12,14,19,19,21,25,29,33
02:09
Intro Stats / AP Statistics


What is the number of degrees of freedom for a simple
bivariate linear regression with 20 observations?
20
22
18
25
02:18
Intro Stats / AP Statistics

"An idempotent matrix is a generalized inverse of itself."
03:37
Intro Stats / AP Statistics

Twelve randomly chosen students were asked how many times they
had missed class during a certain semester, with this result: 2, 1,
5, 1, 1, 3, 4, 3, 1, 1, 5, 18. For this sample, the median is
3.5
3
2
2.5
02:21
Intro Stats / AP Statistics

Find the indicated probability.
A multiple choice test has 7 questions each of which has 5 possible
answers, only one of which is correct. If Judy, who forgot to study
for the test, guesses on all questions, what is the probability
that she will answer exactly 3 questions correctly?
answers: a) 0.275 b) 0.885 c) 0.115 d) 0.00800
02:23
Intro Stats / AP Statistics

At least 99.75% of the data in any data set lie within how many
standard deviations of the mean? Explain how you arrived at
your answer.
1 2 3 4 5 ... 16