Question

1. List and describe the three different uses of statistics

2.The mean value of a random variable that has a standard normal probability distribution is zero.

Question 6 options:

	True
	False

3.Prior to exploring possible relations we need to know the difference between independent and convergent variables

4. Describe the four levels of measurement that are needed to determine what descriptive statistics to perform on a dataset. Describe when each measure is appropriate.

5.Compare and contrast the three measures of central tendency. Your answer must include an example of each.

6.When do you “IF”, “SMALL”, “LARGE”, and COUNT functions?

7. When is it appropriate to use a non-parametric test? Provide an example to exhibit how it might be useful.

8. Compare and contrast covariance and correlation. List an example of when it is appropriate to use each.

	True
	False

Answer 1

Solution:

1)

(a) Statistical Inquiry: Statistics provide proper and efficient planning of a statistical inquiry in different fields of study. Which is useful in inquiry and gathering information.

(b) Comprehensive Study: Statistics helps in understanding the nature and pattern of variability. Also, it helps in presenting complex data in a diagrammatic and graphic form for an easy and clear comprehension of the data.

(c) Statistical Inference: Statistics helps in analyzing the statistical inferences, along with measuring the reliability of the population parameter. Statistical inference helps to make decisions on population parameters on the basis of samples.

(2)

TRUE

The mean of 0 and a standard deviation of 1 usually applies to the standard normal distribution, which is generally called the bell curve.

Therefore, The mean value of a random variable that has a standard normal probability distribution is zero