Chapter 1: Introduction to Statistics
Multiple-Choice Questions
Note: Questions identified with (www) are available to students as a practice quiz on the
cengage.com/psychology/gravetter website.
1. A researcher uses an anonymous survey to investigate the
Estimation - Chapter 6
6.7
standard deviation of LVEF from table 6.9 = 0.080
6.8
standard error of the mean of LVEF from table 6.9 = 0.015
if you had entered the data in Statcrunch, your answers would look as follows .both the standard
deviation and stand
Problem Answers Chapter 7
7.1
Ho: = 1.0
H1: 1.0
This is a one-sample z-test (you are given the population standard deviation). The data are continuous,
values of serum-creatinine.using equation 7.13.
z = (1.2 - 1.0) / (0.4 / r12) = 1.73
The critical value
Problem Answers Chapter 7
7.1
Ho: = 1.0
H1: 1.0
This is a one-sample z-test (you are given the population standard deviation). The data are continuous,
values of serum-creatinine.using equation 7.13.
z = (1.2 - 1.0) / (0.4 / r12) = 1.73
The critical value
Probability - Chapter 4
4.1 probability-mass function for X is Rosner's terminology for a probability distribution . random variable is the number of hypertensive adults . P(mom) = 0.1 P(dad) = 0.2
mothers DBP >= 95 fathers DBP >= 95 neither mom nor dad .
Probability - Chapter 5 - Extra Problems
census data say that the prevalence of cervical cancer is 0.2%
5.16
new data show that out of 100,000 women, 100 have
cervical cancer . is the new data consistent with the census
data?
. use the normal approximatio
Probability - Chapter 4 (EXTRA PROBLEMS)
4.53
probability of otitis media in 6 months? in one year?
given the data in table 4.16 .
out of 2500 disease free infants at the start of the year, 1875 are disease free after 6 months .
so 2500 - 1875 = 625 have
Estimation - Chapter 6
6.7
standard deviation of LVEF from table 6.9 = 0.080
6.8
standard error of the mean of LVEF from table 6.9 = 0.015
6.10
2.583 (from table 5, page 831 in Rosner)
6.11
-1.313 (from table 5, page 831 in Rosner)
6.12
2.365 (from table
DESCRIPTIVE STATISTICS - Chapter 2
NOTE: Some of these problems have EXACT answers (e.g. what's the MEAN), while others ask for your
impression (what do the statistics or graphics indicate). There's a bit of leeway in the answers that require
impressions.
Probability - Chapter 4
NOTE: Pc=complement of P
4.1 A "probability-mass function" for X is Rosner's terminology for a probability
distribution.
there can be 0, 1, or 2 hypertensive adults.
A = mothers DBP >= 95
B = fathers DBP >= 95
P(A) = .1
P(B) = .2
n