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review for Unit 2 P & S test Flashcards | StudBud
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review for Unit 2 P & S test
review for Unit 2 P & S test
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review of vocabulary terms for Probability & Statistics unit 2 descriptive stats
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
Find the prediction given the regression line:y = .23x+2.67. Predict y when x = 30
9.99
9.57
8.12
8.77
2
Find the weighted mean: Homework 50%, quizzes 30% Tests 20%. Jon's grades; T= 98%,Q=96%, HW = 50%.
73.4%
74.5%
75%
76%
3
The main difference between a bar graph and a histogram is ...
the histogram has bars that touch
the histogram is arranged in descending order
the bar graph can be colored
the bar graph serves people only over 21
4
What type of graph is shown below?
pie chart
histogram
frequency polygon
ogive
5
Which word best describes the number 45 in the data set below:[11,14,16,11,13,15,16,45,11,12,13,14]
outlier
median
mode
mean
6
Find the mean for the following data:[134,162,143,155,113]
141.6
140.7
141.4
142.9
7
Find the midpoint of a class 30-39
35.5
35
34.5
34
8
graphing data with a positive skew means the tail is going to be on the ____side of the graph
neither
both
left
right
9
Two sets of data have correlation ofr = -.56. describe the correlation.
strong positive correlation
weak negative correlation
weka positive correlation
strong negative correlation
10
In a frequency table the lowest value is 7 the highest is 35, if I want 3 classes, what should be my width?
9
10
12
11
11
The number which occurs most often in a data set is the
mode
standard deviation
mean
median
12
In the following, which is higher, the mean or the median?[23,26,28,31,26,38,11,78,34,43,29]
mode
mean
median
both are equal
13
If Maya bought 5 boxes of kleenex at $1.67 and 5 rolls of paper towels at $3.99 what was the mean cost per item?
2.43
2.94
2.83
2.78
14
What is the greek word for "sum"
delta
kappa
add
sigma
15
In the Ogive graph, the data is shown in _____frequencies
generous amount of
cumulative
descending
ascending
16
Which of the following would more closely resemble a uniform frequency distribution?
1,1,4,5,4,1,1
2,3,4,2,3,4,2,3,4
5,5,5,5,8,9
5,5,5,5,2,1
17
If a pie chart is made to represent the number of 9th grade students, what percent will 145 out of 632 9th graders be?
22.9%
20.8%
23.1%
21.6%
18
The word used to describe the difference between the largest and smallest values in a data set
range
variance
width
stove
19
A graph using x and y coordinates is called a
scatter plot
stem and leaf plot
pie chart
histogram
20
What type of graph is shown here:
skewed left
uniform
symmetrical
skewed right