choose the best answer:

1. X is a data set having a normal distribution with mean=80 and its standard deviation of 5 is given. What is the X value for area 89% taken from left tail to right tail?

• 10.78
• 7.34
• 14.13
• None of the above

2.f population standard deviation is unknown then we use which distribution for analysis?

• normal distribution
• Chi-square
• F distribution
• None of the above

3.Skewness for a T distribution is equal to:

• 0
• 1
• -1
• 2

4.Generalizing the results of samples onto population is called?

• descriptive statistics
• expectation problem
• estimation problem
• None of the above

5.distance from mean is indicated by:

• Standard Deviation
• Z score
• Both of the above
• None of the above

6.X is a dataset having a normal distribution with mean=80 and its standard deviation of 5 is given. What is the probability P(46

• 0.00%
• 1%
• 50.00%
• None of the above