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Probability and Statistics Midterm Review Flashcards | StudBud
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Probability and Statistics Midterm Review
Probability and Statistics Midterm Review
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1
What percentage of all values are in the entire normal curve?
68%
99.7%
95%
100%
2
The z-score is used to --------- the raw scores.
Minimumize
Categorize
Standardize
Analyze
3
How many outliers are shown?
2
Outliers? What, the graph isn't telling the truth?
None
1
4
What is an example of quantitative data?
gender
the temperature of something being very hot
eye color
the height of all students in class
5
Examples of categorical data
Zip codes
Race Times for an Olympian race
Political parties running for government
Heights of students in Transition Year
6
How do you find IQR?
Q3 - Q1
\frac{\left(Q3+Q1\right)}{2}
Max - Min
Q3 + 1.5*1QR
7
Another name for a normal curve is
reliable curve
bell curve
skewed curve
valid curve
8
What Is The Mean Of the Normal Curve
X=0.5
X=-1
X=1
X=0
9
What is the upper boundary for outliers?
40
50
45
55
10
What's The Standard Deviation Of The Normal Curve?
1.5
0.5
1
-1
11
In a stemplot key, what could this represent? 9|3
9
9
93
39
12
Which boxplots have the same result for their
IQR
?
School and Class
State and Class
State and School
13
What is the range of this histogram?
55
100
80
92
14
A normal distribution curve is __________
symmetric
funny
skewed
always purple in color.
15
What's The Standard Deviation Of The Normal Curve?
1
-1
1.5
0.5
16
What is the lower boundary for outliers?
0
10
5
15
17
Find the z score: The average height in the class is 68.5 inches and you observe a height that is 69.1 inches. SD=3 in.
0.2
0.1
-0.2
0.6
18
Describe the histogram.
unimodal, skewed left, multiple gaps and outliers
unimodal, skewed right, multiple gaps and outliers
bimodal, skewed left, multiple gaps and outliers
multimodal, skewed right, multiple gaps and outliers
19
What characteristic of a distribution does standard deviation measure?
Frequency
Shape
Spread
Center
20
Which of the following is categorical data?
How many students are 12 years old?
What color are our students eyes?
What is the mean of the number of books we have read?
How many students have a dog for a pet?
21
Match the dotplot below with the type of shape that is most appropriate.
Bell-shaped
Right Skewed
Approximately Uniform
Left Skewed
22
Can you determine the number of jars he used to create the histogram?
Yes, 10 pieces of candy
No, you cannot determine the frequency.
No, there is not enough information
Yes, 4 pieces of candy
23
On a normal curve, what % of data lie above the mean?
68%
95%
99.7%
50%
24
The stemplot displays the 1988 per capita income (in hundreds of dollars) of the 50 states. Shape?
Symmetric distribution, mean greater than median
Skewed distribution, median greater than mean
Symmetric distribution, median equal to mean
Skewed distribution, mean greater than median
25
Dotplots are used to to represent what type of data?
Quantitative
Qualitative
Categorical
Statistical
26
State the IQR
10
12
9
11
27
Is this a histogram?
no
math is hard
yes
28
The Normal Curve is a?
U Shaped Curve
Ball Shaped Curve
Parabola Shaped Curve
Bell Shaped Curve
29
In which of the following distributions would the mean be GREATER than the median?
Uniform Distribution
Normal Distribution
Skewed Right
Skewed Left
