QUESTION 1

1. Randomly selected 50 people from New York City were asked 
2. if they use a subway to get to the work place. 40 said "Yes". 
3. Based on this sample data was made a statement that 80% 
4. of the whole population of New York City take subway to get to the work place. 
5. Does this statement represent descriptive or inferential statistics?
6. descriptive
7. inferential

1 points  

QUESTION 2

1. Table below shows example of frequency and relative-frequency distribution.
2. IntervalFrequencyRelative frequency22-2940.1630-3960.2440-49?0.4050-5950.20Total 1.00
3. Find missing frequency for interval 40-49.
4. 8
5. 10
6. 12
7. 15 

1 points  

QUESTION 3

1. A sample of democratic voters were asked if they voted 
2. in the primary election for Hillary (H), Sanders (S) or none above (N).
3. Here is the result of this poll:
5. H H S S S N N N H N
6. S H S S N H N H N N
7. S S S N N N H N N N
8. N H S S S N N N N N
9. Based on this sample, what is the relative frequency
10. for number of likely democratic voters who will not
11. participate in the coming election?
12. 0.28
13. 0.10
14. 0.50
15. 0.35 

1 points  

QUESTION 4

1. Find the Median for the following set of data:
2. 11, 22, 5, 7, 30
3. 5
4. 11
5. 6
6. 15

1 points  

QUESTION 5

1. Find the Median for the following set of data:
2. 25, 20, 8, 10, 28, 16, 22, 15
3. 22
4. 19
5. 18
6. 25

1 points  

QUESTION 6

1. Calculate Weighted Mean for the following Data:
2. Value
3. Weight202254324402
4. 29
5. 28
6. 26
7. 30

1 points  

QUESTION 7

1. What data collection represents this Steam-and-Leaf Diagram?
3.  Stems  Leaves 2 1, 4  3 2, 5 4 0, 3 5 6, 8 
4. 1, 4, 2, 5, 0, 3, 6, 8
5. 2, 1, 4, 3, 2, 5, 4, 0, 3, 5, 6, 8
6. 12, 42, 23, 53, 04, 34, 65, 85 
7. 21, 24, 32, 35, 40, 43, 56, 58

1 points  

QUESTION 8

1. Based on this Histogram, what percentage of data are below 41?
3. If you don't see a Histogram, click here 
4. 40%
5. 50%
6. 65%
7. 75%

1 points  

QUESTION 9

1. Calculate sample variance for the following data collection:
2.  10, 25, 28, 35
3. (when you calculate variance, divide by N-1 not by N).
4. 85
5. 111
6. 150
7. 180

1 points  

QUESTION 10

1. Calculate sample standard deviation for the following data collection: 
2. 22, 24, 28, 31, 35
3. (use formula for sample, not for population:
4. when you calculate variance divide by N-1 not by N).
5. 5.2
6. 6.4
7. 7.1
8. 8.0

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