# Descriptive Statiatics

REQUIRED COURSE MATERIALS

Grove, S. (2007). Statistics for health care research: a practical workbook. (1st ed.). St. Louis, MO: Elsevier. ISBN-13: 9781416002260 (Includes only Exercises 16, 29, 31, 36, 27 and 40) (Available as eBook in Canyon Connect)

Burns, N., & Grove, S. (2011). Understanding nursing research: Building an evidence-based practice. (5th ed.). St. Louis, MO: Elsevier. ISBN-13: 9781437707502 (Includes only chapters 9 and 11) (Available as eBook in Canyon Connect)

ââ?¬¢ Define basic statistical terms and explain why statistics are useful in describing and simplifying data.

ââ?¬¢ Explain graphical descriptions of data and how a frequency distribution is used to describe a dataset.

ââ?¬¢ Calculate means and variances and use them to describe data and to describe the shape of the frequency distribution.

1. A formula for the sample mean is

a. µ = ?.n

b. M = ?X/n

c. M = s/n

d. µ = s/n

e. none of the above

2. A formula for the sample variance is

a. s = ?X - M2

b. ?2 = ?(X - µ)2/N

c. s2 = ?(X - µ)2/N

d. s2 = ?(X - M)2/(N - 1)

e. none of the above

3. A formula for the sample standard deviation is

a. s = s.n

b. M = ?X/n

c. s = ?s2

d. µ = s/n

e. none of the above

4. A computational formula for the sample variance is

a. s2 = s.n

b. S2 = ?X2 - (?X)2/N

c. s = ?(s2)

d. µ = s/n

e. none of the above

5. For the following sample of scores:

2, 6, 1, 4, 2, 2, 4, 3, 2

Find the mean, variance and standard deviation

6. A sample of size 7 (n = 7) has a mean of M = 9.

One of the sample scores is changed from x = 19 to x = 5. What is the value for the new sample mean?

7. Using Excel create a histogram and a line graph using the scores in the following table:

X f

1 2

2 1

3 6

4 7

5 4

6 4

7 1

8 1

Insert your histogram and line graph.

Module 1: Exercise 16

1) Read Exercise 16 in Statistics for health care research: a practical workbook.

2) Complete the study questions about the reading.

3) Check your answers to the study questions.

4) Copy and paste the Exercise 16: Questions to be Graded from page 122 into a word document.

a) Complete the questions on the document and place the document Or, as an alternative, you can

b) Print the page out, and complete the questions by hand (make sure your answers are legible).

5) Please show your work. (Use Word's equation editor, etc., and/or provide a short written description as to how you obtained the final result.)

Descriptive Statistics Excel Worksheet

1) Refer to "Descriptive Statistics Excel Worksheet" ATTACHED

2) Answer the questions on the Excel document.

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#### Solution Summary

The solution provides step by step method for the calculation of Descriptive Statiatics. Formula for the calculation and Interpretations of the results are also included.