WorksheetsNormal Distribution Review
Total questions: 21
Worksheet time: 25mins
Which of the following is NOT a characteristic of a Normal Distribution Curve?
It is a continuous bell-shaped curve.
The curve is symmetric about the mean.
The curve is asymptotic about the y -axis.
The total area under the curve is 1 .
If X is normally-distributed random variable, then the probability that the values of X lies within 2 standard deviations of its mean is 95% .
True
False
What can be said about the means and standard deviations of the curves shown in the figure?
The curves have the same means and standard deviations.
The curves have the same means but different standard deviations.
The curves have different means but the same standard deviations.
The curves have different means and standard deviations.
What is the total area under the standard normal curve?
0
1/2
1
2
Set up the z score formula for the following information:
A report stated that the average number of times a cat returns to its food bowl during the day is 36. Assume the variable is normally distributed with a standard deviation of 5, and that we wish to find the percentage of cats that return to their dish less than 32 times a day.
z=536−32
z=532−36
z=3632−5
z=1−536
What was the median score?
39
50
55
16
32%
Which measure goes in the center of the Normal Curve?
standard deviation
mean
median
mode
Use the following information and the Empirical Rule to estimate the answer.
The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.
Find the percentage of golfers that are between 30 and 46 years old.
68%
94%
95%
99.7%
About what percent of the products last between 12 and 15 days?
Then, 68% of all tires will have a life between ___________ km and __________ km.
This data is normally distributed. What percent of the data is in the shaded regions?
5%
95%
2.5%
50%
