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Central Tendancy
Z - Score
Normal distribution
Standard Deviation
Misc
100
Calculate the Mode of the following data set:


2, 4, 1, 2, 5, 7, 7, 8, 4, 3, 2, 1, 8, 9, 2, 4

2
100

What is the formula for Z scores?


100
What is another name for a normal curve?
Bell curve
100

Find the standard deviation of 5, 7, 4, 9, 10.

2.55

100

If the mean SAT score is 1100, with a standard deviation of 25, what score is the 75th percentile?

1117

200

Calculate the Median of the following data set:

2, 4, 1, 2, 5, 7, 7, 8, 4, 3, 2, 1, 8, 9, 2, 4

4
200
Calculate the z score if the mean is 23.5, standard deviation is 3.3 and your point is 19.2
-1.3
200
What percent of data falls within 2 standard deviations of the mean?
95%
200

Find the standard deviation of the following data: 13, 10, 0, 9, 13, 11

4.84

200

In a city, the average commute time to work is 30 minutes, with a standard deviation of 5 minutes, following a normal distribution. What is the maximum commute time within which the fastest 20% of the commuters fall?

34 mins

300

Calculate the Mean of the following data set:

2, 4, 1, 2, 5, 7, 7, 8, 4, 3, 2, 1, 8, 9, 2, 4

4.31

300
If you have a z score greater than 3 you have a what?
outlier
300
If your mean is 45 and SD is 5. what percentage of people fall within 40-50
68%
300

Find the Standard Deviation of the following data: 20, 9, 35, 30, 12, 7, 7, 45, 42, 41

15.52

300

The mean score on a standardized test (which follow a normal curve) is 100, with a standard deviation of 15. What is the minimum score needed to be in the top 10% of test-takers?

119

400

Calculate the Standard Deviation of the following data set:

2, 4, 1, 2, 5, 7, 7, 8, 4, 3, 2, 1, 8, 9, 2, 4

2.7
400

If Matt score a 67 on test 1 with a mean of 60 and a SD of 4 and scored a 78 on test 2 with a mean of 68 and a SD of 5.5. On which test did Matt perform better compared to the average? and what was his z score?

Test 2 1.82

400
if the mean of a set of data is 23 and the SD is 6 what percentage of data fall between 13 and 28?
74.9%
400

Frank has 3 nickels (5 c), 5 dimes (10 c), and 2 quarters (25 c). Find the standard deviation.

7.47

400

The average waiting time for customers at a bank is 15 minutes, with a standard deviation of 3 minutes, following a normal distribution. If the bank wants to serve 90% of customers within what waiting time, what is the maximum waiting time they should target?

20 mins

500

Calculate the range of the following set

2, 4, 1, 2, 5, 7, 7, 8, 4, 3, 2, 1, 8, 9, 2, 4

1-9
500

A manufacturer of devices has determined the mean life of the devices is 32.4 months, with a standard deviation of 6.7 months. What length of warranty should be offered if the manufacturer wants to restrict repairs to less than 7.5% of all the devices sold?

22.75 months

500

If the mean shoe size of SHSS is 10.2 with a SD of 1.6, how many people would have a larger shoe size than 12 and smaller than 8 if there are 400 people in school

77

500

The average temperature in a city during summer is 85°F with a standard deviation of 10°F, following a normal distribution. If you want to be in the top 15% of the coolest summer days, what is the highest temperature you should expect?

75