WorksheetsStatistics and Probability
Total questions: 18
Worksheet time: 18mins
Given a data set with a z score of 4.2, a mean of 3.2 and a standard deviation of 2.8, what is the data point?
11.76
14.96
15.97
-14.99
Given a data point 1.2, a standard deviation of 5.2 and a z-score of -2.0. What is the mean?
11.6
-11.6
3
1
Is this a probability distribution?
No
Yes
Find the mean (expected value) of the probability distribution.
85
83.2
87.1
84.4
Which of the following is an example of a discrete variable?
Number of red marbles in the basket
Distance traveled between tricycles
Height of the students in a certain class
Weight of student
Let X be the time it takes to finish a one-hour exam. What are the possible values of X (in hours)?
x≤1
0≤x≤1
0<x<1
What is the sample space suppose two coins are tossed?
{HH,HT,TH,TT}
{H,T}
{HH,TT}
{HHH,TTT, HHT, HTH, HTT, THH, THT,TTH}
If a fair coin is tossed twice, what is the probability of seeing heads exactly once?
3/4
1/3
1/2
2/3
Describe the figure.
Normal Curve
Normal Histogram
A normally distributed set of data's graph resembles:
A fire hydrant
A bath tub
A bell
A tree
The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.
True
False
Total area under the curve of Normal Distribution is equal to (a) .
0.5404
0.4806
0.5747
0.6802
0.3418
Given a mean of 75 and a standard deviation of 7, what percentage of scores are between 75 and 82?
68%
81.5%
16%
34%
