Tema
Q:
Create a line plot that showe the frequeney of the July high temperatur
Q:
Create a line plot that showe the frequeney of the July high temperatur
Q:
Which of the following Python methods is used to perform a paired t-test for the
difference in two population means? Select one.
paired_ttest from scipy module
proportions_ztest from statsmodels module
ttest_ind from scipy module
ttest_rel from scipy module
Q:
Notice that the alternative hypothesis is a two-tailed test. Suppose ttest_ind methoc
from scipy module is used to perform the test and the output is \( (-1.99,0.0512) \).
What is the P-value for this hypothesis test? Select one.
1.99
0.0512
0.0256
-1.99
Q:
What are the inputs to ttest_ind method in the scipy module? Select one.
null and alternative hypothesis values
test statistic and the P-value
z-score and the corresponding P-value
dataframes of values from each sample and optional equal variance indicator
Q:
Suppose the scores on a college entrance examination are
normally distributed with a mean of 525 and a standard
deviation of 125. What score would place a student in the
30th percentile? Round your answer to the nearest integer.
Q:
Notice that the alternative hypothesis is a one-tailed test. Suppose proportions_ztest
method from statsmodels is used to perform the test and the output is \( (1.13,0.263) \).
What is the P-value for this hypothesis test? Select one.
-1.13
1.13
0.1315
0.263
Q:
The weight of frogs in grams in a marsh population
are normally distributed with mean \( (\mu) \) equal to
23.5 grams and standard deviation \( (\sigma) \) equal to 1.4
grams. How much would a frog need to weigh (in
grams) to be in the 85 th percentile for weight?
Round your answer to two decimal places.
Q:
For the pairs of variables below, state whether the correlation between them would be expected to be
positive, negative or no correlation:
(a) Daily temperature and the number of visitors to a beach.
(b) An adult's shoe size and their IQ.
(c) A person's income and the amount of tax they must pay.
(d) Alcohol consumption and ability to safely drive a car.
Q:
5. Mary collected 31 rocks on Monday, 27 on Tuesday,
27 on Wednesday, 33 on Thursday, and 22 on Friday. What
is the mean number of rocks she collected?
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