SaiBook.us Statistics

Lesson Example Discussion Quiz: Class Homework

Quiz At Home

Title: Normal distribution

Grade: 9-a Lesson: S4-L9

Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the five problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts.

Quiz: at Home

Problem Id	Problem	Options
1	X is normal variate with mean 42 and standard deviation 4.Find the probability that a value taken by X is less than 50.	A) 0.4127 B) 0.6874 C) 0.8451 D) 0.9772
2	Heights of men are normally distributed with a mean of 68.6 inch and a standard deviation of 2.8 inch.Find the percentage of men who are taller than a showerhead at 72 inch.	A) 0.2245 B) 0.1131 C) 0.2571 D) 0.3054
3	Assume american household generates an average of 28 pounds of newspaper per month for garabage or recycling with the standard deviation of 2 pounds.If a household is selected at random,find the probability of its generating between 27 and 31 pounds per month.	A) 31% B) 52% C) 62% D) 81%
4	Determine the P(-2.46 < z < 1.88) for the standard normal distribution.	A) 0.9630 B) 0.9699 C) 0.9514 D) 0.9169
5	If X be a continuous random variable that is normally distributed with a mean 80 and S.D. of 12.Find the probability that X assumes a value greater than 69	A) 0.2015 B) 0.8212 C) 0.1889 D) 0.1385

Problem Id

Problem

Options

X is normal variate with mean 42 and standard deviation 4.Find the probability that a value taken by X is less than 50.

A) 0.4127
B) 0.6874
C) 0.8451
D) 0.9772

Heights of men are normally distributed with a mean of 68.6 inch and a standard deviation of 2.8 inch.Find the percentage of men who are taller than a showerhead at 72 inch.

A) 0.2245
B) 0.1131
C) 0.2571
D) 0.3054

Assume american household generates an average of 28 pounds of newspaper per month for garabage or recycling with the standard deviation of 2 pounds.If a household is selected at random,find the probability of its generating between 27 and 31 pounds per month.

A) 31%
B) 52%
C) 62%
D) 81%

Determine the P(-2.46 < z < 1.88) for the standard normal distribution.

A) 0.9630
B) 0.9699
C) 0.9514
D) 0.9169

If X be a continuous random variable that is normally distributed with a mean 80 and S.D. of 12.Find the probability that X assumes a value greater than 69

A) 0.2015
B) 0.8212
C) 0.1889
D) 0.1385