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WorksheetsEmely's U3a REDO PREP
Total questions: 23
Worksheet time: 2hrs 49mins
When the median is more than the mean this results in a positive skew
false
true
When the mean is less than the mode this leads to a ...
positive skew
negative skew
the mean is less than the median
skewed left
skewed right
symmetrical
12, 13, 11, 16, 31, 14, 10, 15
red, blue, red, yellow, red, green, black, red, white, red, red
What measure of center is best to use when we have outliers?
mean
median
mode
range
When analyzing numerical data, the best measure of center with NO outlier is:
mean
median
mode
range
First marking period is worth 40%, second marking period is worth 40%, and the final exam is worth 20% of the final semester grade. Heath earned a 94% first marking period and a 91% second marking period. Heath wants to finish the semester with an A (at least a 90%). What does he need to score on the final exam to make this happen?
16%
50%
80%
90%
At a health club, 80% of the members are men and 20% of the members are women. If the average age of the men is 30 and the average age of the women is 40, what is the average age of all the members?
32 years old
33 years old
32.5 years old
34 years old
A new cars salesperson, sold an average of $28,000 per day for the first 5 days she worked. The next 3 days she worked, she sold an average of $42,000. How much did she sell on average per day over the entire 8 days?
266,000
32,000
33,250
31,250
Find the z-score value corresponding if the location is below the mean by 2 standard deviations
+2.00
-2.00
+1.25
-1.00
What does it mean to have a z-score of z=0 on a quiz?
It means you did better than zero people.
It means you scored the same grade as the average grade.
It means you earned a zero on the quiz.
It means the average score was a zero.
Use the image of the normal graph provided. What is the value of the standard deviation?
6
12
36
18
When playing a Quizizz game having a score with a negative z-score is better than a positive z-score.
True
False
Find the cumulative frequencies.
28, 56, 84, 100
28, 58, 70, 72, 74, 76
33%, 37%, 20%, 7%, 7%, 7%
28, 30, 12, 2, 2, 2
What is another name for the ogive?
Histogram
Frequency Polygon
Cumulative frequency graph
Pareto chart
The vertical axis of an ogive comes from this column:
Class
Frequency
Midpoint
Cumulative Frequency
Class Endpoints
What type of graph is shown?
Frequency Histogram
Relative Frequency Histogram
Ogive
Line graph
According to the ogive, what is the approximate number of college students who were surveyed?
80
100
120
350
You have a mean of 56 and a standard deviation of 4.3. What is +2 standard deviations from the mean?
60.3
47.4
51.7
64.6
