The mean temperature in Glens Falls in February is 23 degrees with a standard of deviation of 4.2 degrees. What percent of the days in February will have temperatures below 23 degrees?
5%
34%
50%
68%
2. Multiple Choice
30 seconds
1 pt
A
B
C
D
3. Multiple Choice
30 seconds
1 pt
A
B
C
D
4. Multiple Choice
30 seconds
1 pt
If a number is added to a data set that is far from the mean, how does this affect the standard deviation?
increase
decrease
stays the same
both increase and decrease
5. Multiple Choice
30 seconds
1 pt
What can be said about the histogram?
normal
skewed right
skewed left
none of these
6. Multiple Choice
30 seconds
1 pt
If the smallest number in a set is replaced with an even smaller number which will be most affected by the change?
mean
median
mode
none of these
7. Multiple Choice
30 seconds
1 pt
The following describes a histogram that plots the time a customer enters a restaurant that is open for lunch and dinner.
unimodal
bimodal
none of these
8. Multiple Choice
30 seconds
1 pt
The front row of a movie theatre has 57 seats. Which seat are you in if you occupy the median position?
28
29
27
no median seat
9. Multiple Choice
30 seconds
1 pt
Which of the following can have more than one value for a set of data?
mean
median
mode
none of these
10. Multiple Choice
30 seconds
1 pt
0.84
0.16
0.815
none of these
11. Multiple Choice
30 seconds
1 pt
0.0015
0.985
0.997
none of these
12. Multiple Choice
30 seconds
1 pt
Find the data value given a z-score of 2.5, a mean of 20 and a standard deviation of 4.
28
22.5
30
none of these
13. Multiple Choice
30 seconds
1 pt
0.0062
0.9938
0.0124
none of these
14. Multiple Choice
30 seconds
1 pt
0.1151
0.8849
0.7698
none of these
15. Multiple Choice
30 seconds
1 pt
Given a mean of 16 and a standard deviation of 2. Find the z-score for a data value of 13.
-2
2
1.5
-1.5
16. Multiple Choice
30 seconds
1 pt
The average shelf life a dairy product is normally distributed with a mean of 12 days and a standard of deviation of 3 days. About what percent of the data will last between 12 and 15 days?