1. What type of scale are we using when we ask the gender
a. Ratio scale
b. Ordinal scale
c. Multiple-item scale
d. Interval scale
e. Nominal scale
2. What type of scale is the following?
What was your annual gross income before taxes last year?
1. Statistics is an art and technique for systematically:
a. Recording data.
b. Analyzing data.
c. Interpreting data.
d. Collecting data.
e. All of these.
2. A measure of any attribute, belief, or attitude, taking data from the entire
population is referr
2.0 points out of 2.0
Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system,
and orders an inspection of "each and every payroll voucher issued since Ja
2.0 points out of 2.0
Whenever hypotheses are established such that the alternative hypothesis is ">", then this
would be a _.
A. two-tailed test
B. one-tailed test
C. Type II test
D. Type I test
If the mean of a normal distribution is negative
A. The standard deviation must also be negative
B. The variance must also be negative
C. A mistake has been made in the computations, because the mean of a normal distribution
In hypothesis testing, the burden of proof is always on the
a. Null hypothesis
b. Alternative hypothesis
c. Null hypothesis if Type I error is small
d. Alternative hypothesis if Type II error is large
Manuel Banales, Marketing Director of Plano Power Plants, Inc.'s Electrical Division, is leading a study to
identify and assess the relative importance of product features. Manuel directs his staff to design a survey
questionnaire for d
A marketing firm is trying to determine if the type of car purchased in Oakland County is independent of
the age of the driver. The firm takes a random sample of 309 car purchases at two different new car
dealerships in Oakland County,
Data and Data Sets
Data can be referred as bits of information
Data are the facts and figures collected, analyzed,
and summarized for presentation and interpretation.
Nominal Scale: Has a property of description to categorize the data.
Ordinal Scale: Has
Coefficients Stan Error t Stat P-value L 95% U 95% L 95.0% U 95.0%
Intercept -18939.758 8389.570205 -2.257536152 0.0254788 -35522.37332
-2357.14276 -35522.37332 -2357.142759
Gender -13139.208 3799.152608 -3.458457625 0.0007147 -20648.51863 -5629.89799
Advance Statistical Methods
Is there a statistically significant difference (Alpha = .10) in the variance of the weights
that were reported by the women versus the variance of the weights that were reported
by the men who responded to the ISS?
Using the sample data provided in the ISS Data Set, show and discuss the descriptive
statistics that describes the projected salaries that were reported in the Initial Student
Projected Salaries Mean 57038.46154 Standard Error 1635
A September 2012 Gallop poll was taken to determine national political party affiliation.
Results for the three major parties are listed below.
Republican 27% Independent 36% Democrat 35%
Do the data in the ISS support the notion that Wayne St
Based on the sample data collected in the Student Survey, is there a difference in the
expected salaries upon graduation as reported by women when compared to the
expected salaries reported by men? Alpha = .05
H0: Expected Salaries for Women -
1. In a Census study, inferences are drawn from the data collected through,
a. Few units (Sample)
b. Half body of units
c. Entire body of units (Population)
d. None of the above
e. All of the above
2. The true population mean value for a variable, is know
If you determined that there is a difference between Expected Salary based on Major
(from Question #9), conduct pair-wise comparisons to find where the differences are.
The following chart will use the Fisher-LSD pair-wise comparison method to find where