6. What is the corresponding z-score that bounds the shaded area?
            z=

7. What is the area under the normal curve of the following situation?
       right of z=−1.43z=−1.43

8. What is the corresponding z-score that bounds the shaded area?
           z=

9. What is the area under the normal curve of the following situation?
         left of z=2.08z=2.08

10. What is the area under the normal curve of the following situation?
         between z=−0.87z=−0.87 and z=1.75z=1.75

11. What is the corresponding z-score that bounds the shaded area?
         z=

Find the​ z-score such that the area under the standard normal curve to the left is 0.52

whenever a data value is less than the​ mean

a.) he corresponding z-score is negative

b.) we do not consider it

c.) the corresponding z-score is positive

d.) it is considered unusual.

Module 4 Minitab Assignment

Instructions:

Below you will find questions. Please use the provided data to complete the tasks and to answer the questions.

For the standard normal distribution, Z, find the proportion (percentage) of observations that satisfies each of the following statements. In each case, use a graph of the Normal curve and shade the area under the curve that is the answer to the question. 

Values of z larger than 2.33.

Between z = −1.50 and z = 1.18. 

Values of z less than 1.19. 

A set of final examination grades in an introductory statistics course was found to be normally distributed with a mean of 77 and a standard deviation of 8. For each of the following produce a normal distribution plot showing the appropriate shaded area.

What percentage of students scored lower than 70 on this exam? 

What percentage of students scored between 81 and 89? 

What percentage of students scored higher than 90 on this exam? 

What is the 80th percentile of scores? 

What is the 95th percentile of scores?