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STAT 400 Midterm: STAT400 PILACHOWSKI-T FALL2013 0101 MID EXAM

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turquoisegnu128
15 Feb 2019
School
University of Maryland
Department
Statistics and Probability
Course
STAT 400
Professor
All

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Document Summary

Stat 400 exam 1 (2. 1 4. 2) You must show all appropriate work in order to receive full credit for an answer: before handing in your test: on your first answer sheet only, please copy the pledge and sign. Find v(y). (do the calculations to get to an exact value numeric answer. ) 1. d. (1 point) first write out the calculation for. 18 using factorials, then compute to a numeric answer. 2. a. (5 points) the table to the right gives conditional probabilities for grades received in two school subjects. 30% of the students are taking niggling and the rest are taking whinging. Set up the calculation needed to find the probability that a student was in. Whinging given that she got a c. (do not compute. ) 2. b. (5 points) of 100 electrical relays produced at a factory, on average 1 is defective.

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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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Related Questions

Researchers measured the blood pressures of 22 students in
two situations: when the students were relaxed and when the students were taking an
important examination. The file
systolic.txt
lists the systolic and diastolic pressures for
each student in each situation. Dataset is available at
systolic_url = "https://mcs.utm.utoronto.ca/~nosedal/data/systolic.txt"
Use R
to answer each of the following questions. You have to show
all your work
to get
full credit.
Answers, even if correct, with no justifications will not receive any
marks
.
a)
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relaxed from systolic pressure during the exam; call this variable
X
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b)
Using R
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Y
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c)
Using R
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d) What is the fitted regression model? Provide slope and y-intercept
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Use R
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e)
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f) Note the outlier in the residual plot (and on the scatterplot from part c)).
Using
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, delete the outlier from the data set. Then repeat parts c) and e). Note. Use:
2 f )
your last name
as the main title for your plots. (In my case it would be:
2 f ) Nosedal
).
g) What is the fitted regression model (after the outlier has been removed)? Provide slope
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Use R
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