Discuss the folllowing:
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)
Define basic statistical terms and explain why statistics are useful in describing and simplifying data.
Explain graphical descriptions of data and how a frequency distribution is used to describe a dataset.
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 =σ.n
b. M = ∑/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. σ2 = ∑(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 = xs/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