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Humanities: Probability and Statistics Review Flashcards | StudBud
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Humanities: Probability and Statistics Review
Humanities: Probability and Statistics Review
20 terms
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1
What is the probability that a student did not complete the homework given that they failed the test?
\frac{15}{18}
\frac{6}{15}
\frac{4}{10}
\frac{6}{10}
2
The box-and-whisker plot below represents some data set. What is the value of the second quartile?
50
75
15
5
3
The box-and-whisker plot below represents some data set. What is the value of the first quartile?
90
70
66
74
4
How many students play an instrument and speak a foreign language?
46
41
25
16
5
Write the linear regression equation that represents this data, rounding all coefficients
to the
nearest tenth
.
y = 23.9x+ 444.7
y = 27.7x+ 885.7
y = 213(.42)x
y = 26.3x + 792.3
6
Find the probability that a student does not play an instrument and does not speak a foreign language.
\frac{9}{80}
\frac{25}{80}
\frac{16}{80}
\frac{30}{40}
7
In a normal distribution, 68% of the scores fall between 72 and 86 and the mean is 79. What is the standard deviation?
4
7
1
3
8
What is the probability that a student chosen randomly from the class has a dog?
\frac{8}{28}
\frac{2}{18}
\frac{8}{18}
\frac{5}{28}
9
What is the probability that a student chosen randomly from the class has an A?
\frac{15}{22}
\frac{9}{22}
\frac{9}{15}
\frac{6}{22}
10
Use the dot plot to answer the following question. What was the range of commute times?
50
40
45
5
11
Which of the following regressions represents the strongest negative linear relationship between x and y?
Regression 3
Regression 3
Regression 1
Regression 4
12
Find the probability that a student plays an instrument and does not speak a foreign language.
\frac{41}{80}
\frac{25}{41}
\frac{25}{80}
\frac{25}{80}
13
Determine the type of correlation represented in the scatter plot below.
Weak Negative Correlation
Strong Positive Correlation
Strong Negative Correlation
No Correlation
14
Find the P(fail ∣ female).
\frac{33}{90}
\frac{21}{54}
\frac{33}{54}
\frac{21}{90}
15
Cathy had a score of 74, which is 1 standard deviation below the mean. If the standard deviation is 6, what is the mean?
71
77
80
68
16
Find the mean of the data set below.
23
31
14
26
17
Describe the correlation in the scatter plot below.
It shows a positive linear correlation because as x decreases, y increases.
It shows a negative linear correlation because as x increases, y decreases.
It shows a positive linear correlation because as x increases, y increases.
It shows a negative linear correlation because as x increases, y increases.
18
Use the dot plot to answer the following question. How many students scored less than 75?
8
4
10
9
19
Write an exponential regression equation for this set of data, rounding all coefficients
to the
nearest hundredth
.
y = 201.49(1.19)x
y = 253.43(1.23)x
y = 234.98(.25)x
y = 299.25(1.64)x
20
What does the line's y-intercept represent?
The actual temperature when 0 hot cocoas are sold.
The actual number of hot cocoas sold when the temp. is 0 degrees.
A prediction of the number of hot cocoas sold when the temp. is 0 degrees.
A prediction of the temperature when 0 hot cocoas are sold.
