The t-test statistic for a two-sided test would be __________. Answer choices are rounded
to the hundredths place.
-0.70
-2.87
-1.44
-1.39
RATIONALE
Using the information given, we need to find the sam
...
The t-test statistic for a two-sided test would be __________. Answer choices are rounded
to the hundredths place.
-0.70
-2.87
-1.44
-1.39
RATIONALE
Using the information given, we need to find the sample mean: We now know the following
information: Let's plug in the values into the formula:
CONCEPT
T-Tests
2. Which of the statements about one-way ANOVA is FALSE?
The purpose of one way ANOVA is to verify whether the data collected from different
sources converge on a common mean.
ANOVA deals only with one factor, such as treatment or group.
There can be any number of levels in one-way ANOVA.
It is used when there are two independent variables in the experiment.
RATIONALE
When we do the one-way ANOVA we are trying to examine if the means of multiple groups are
equal or not. We aren't testing independence of the variables, that is what we do with a chisquare test for independence.
CONCEPT
One-Way ANOVA/Two-Way ANOVA
3
One condition for performing a hypothesis test is that the observations are independent. Mark is
going to take a sample from a population of 400 students.
How many students will Mark have to sample without replacement to treat the
observations as independent?
40
80
360
300
RATIONALE
In general we want about 10% or less to still assume independence.
So size = 0.1*N = 0.1(400) = 40
A sample of 40 or less would be sufficient.
CONCEPT
Sampling With or Without Replacement
4
Joe hypothesizes that the average age of the population of Florida is less than 37 years. He
records a sample mean equal to 37 and states the hypothesis as μ = 37 vs μ < 37.
What type of test should Joe do?
Left-tailed test
Right-tailed test
Two-tailed test
Joe should not do any of the types of tests listed
RATIONALE
Since the Ha is a less than sign, this indicates he wants to run a 1
tailed test where the rejection reg
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