Practice Final Statistics Exam Questions With Verified Answers
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Course
Statistics
Institution
Statistics
EXAM STUDY MATERIALS July 23, 2024 4:26 PM
Practice Final Statistics Exam Questions
With Verified Answers
F a P-value is small, that means the area of the tail beyond the observed statistic is ____, and so
the observed statistic is ____ under the null hypothesis. - answersmall, unlikely
A low ...
Practice Final Statistics Exam Questions
With Verified Answers
F a P-value is small, that means the area of the tail beyond the observed statistic is ____, and so
the observed statistic is ____ under the null hypothesis. - answer✔✔small, unlikely
A low standard deviation means that most values are ____ the average. A high standard
deviation means that most values are ___ the average. - answer✔✔close to, far away from
If movies is a table containing the column Gross and we run these lines of code
import numpy as npnp.average(movies.select('Gross'))
what is the result? - answer✔✔an error message
Can hypnosis reduce pain? Participants stretched their hamstring muscles before and after
hypnosis while researchers measured the centimeters of stretching possible before their pain
threshold was exceeded. The data are given below. Use this information for #30 - #34
Before
6.8
2.4
7.4
8.5
8.1
6.1
3.4
2.0
After
6.6
6.5
9.0
10.3
EXAM STUDY MATERIALS July 23, 2024 4:26 PM
, 11.3
8.1
6.3
11.6
State the null and alternative hypotheses for the pain test. - answer✔✔Ho: Hypnosis does not
reduce pain. Ha: Hypnosis reduces pain
A table called Client2021 contains a column called Bill_Subtotal, which does NOT include the
local (city, county and state) sales taxes. Those taxes sum to 9% of the subtotal. Which cell of
code would calculate the tax, add it to the subtotal and create a new column in the original table
called Total, that includes the taxes? - answer✔✔Client2021 = Client2021.with_column('Total',
Client2021.column('Bill_Subtotal')*1.09)
What is the result of running this line of code?
type('3.1') - answer✔✔str
A researcher studying the relationship between IQ and GPA ran a linear regression analysis with
GPA as the independent variable that included this output:
LinregressResult(slope=37.012962273764614, intercept=-5.080676863995578...According to
this, what is the predicted IQ for someone with a GPA of 2.8? Round to the nearest whole
number. - answer✔✔99
A 95% confidence interval for the mean of student's final exam score for last semester is:
[81.5, 92.5]
What does that mean? - answer✔✔
When using bootstrapping methods, which of these statements are true?
Find the three correct statements. - answer✔✔-the original sample must be large
-bootstrapping methods are good at estimating measures of centrality, like the mean or median
-each bootsrapped resample must be the same size as the original sample
Below you will find the five number summary for 320 midterm exam scores.
minimum = 10
25th percentile = 50
median = 74
75th percentile = 86
EXAM STUDY MATERIALS July 23, 2024 4:26 PM
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