Statistics- Exhibit 11-1 You are considering testing a new

Exhibit 11-1

You are considering testing a new drug that is supposed to facilitate
learning in mentally retarded children. Because there is relatively little
known about the drug, you plan to use a nondirectional alternative hypothesis.
Since your resources are limited, you can test only 20 subjects. The subjects
will be run in a repeated measures design and the data will be analyzed with
the sign test, usinga= 0.05_{2 tail}.

Refer to Exhibit 11-1. what is the power of this experiment?

	0.2969
	0.2458

	0.6161
	0.4163

In an experiment withN= 14 andP_real= 0.10, what is the
power usinga= 0.01_{2 tail}?

	0.9868
	0.5847

	0.0500
	1.0000

If the independent
variable has a real effect, the probability of rejectingH₀is ____.

	1 – power
	power

	beta
	alpha

In a two-tailed test,
which of the following would yield the same power as a size of effect
represented byP_real= 0.90?

	Preal = 0.10
	Preal = 0.20

	Preal = 1.00
	Preal = 0.80

In an experiment withN= 6 andP_real= 0.15, what is the
power usinga= 0.01_{2 tail}?

	0.5000
	0.0000

	1.0000
	0.3771

In attest, when the size of
the sample is increased, the confidence interval ____.

	changes shape
	increases

	decreases
	stays the same

Exhibit 13-1

A researcher believes that women today weigh less than in previous years. To
investigate this belief, he randomly samples 41 adult women and records their
weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A
local census taken several years ago shows the mean weight of adult women was
115 lbs.

Refer to Exhibit 13-1. The obtained value of the appropriate statistic for
testingH₀is ____.

	tobt = +0.32
	tobt = +2.07

	tobt =-2.07
	tobt =-0.32

Refer to Exhibit 13-1.
The df for determiningt_crit= ____.

	40
	41

	need more information
	39

Refer to Exhibit 13-1.
Usinga= 0.01_{1 tail}, the appropriate critical value is ____.

	±2.423
	-1.684

	-2.423
	±1.684

Refer to Exhibit 13-1.
What do you conclude, usinga= 0.01_{1 tail}?

	retain H0
	reject H0

	accept H0
	accept H1

In an independent
groups experiment, if we must estimate the population standard deviation to
determine the significance of the sample results, the appropriate inference
test is the ____.

	t test
	z test

	sign test
	beta test

AsNgets ____, the
critical value oftgets ____.

	larger; smaller
	smaller; larger

	larger; larger
	smaller; smaller

The proper use of the ttest requires that
____.

	N³ 30
	the sampling distribution of is normal

	the sampling distribution of is normal and N³ 30
	the sampling distribution of is normal or N³ 30

ForN= 20, the degrees of
freedom for the test of the significance of the correlation coefficient (r) is
____.

	20
	21

	18
	19

ForN= 20, the value ofr_critfora= 0.05_{2 tail}is ____.

	0.4438
	0.4329

	0.3783
	0.5614

The 95% confidence
interval is defined as ____.

	an interval such that the probability is 0.95 that the interval contains the population value
	an interval such that we can reject H0 ata = 0.05

	an interval which contains all individual values
	an interval such that we are 95% confident that the population value lies within the interval

“Degrees of
freedom” for any statistic is defined as ____.

	N– 1
	the number of scores that are free to vary in calculating the statistic

	N
	N– 2

In SPSS, to perform a
One Sample T-Test, you click on analyze and then click on ____.

	Compare Means
	One sample T-Test

	Statistical Tests and then select One Sample T-Test
	Compare Means and then select One Sample T-Test

In SPSS, when you
perform the One Sample T-Test ____.

	you need to use the Table option to display the reults
	you need to use the Chart option to display the results

	you need to export the results into a charting software
	the system automatically generates the results

In SPSS, when you
perform a One Sample T-Test, the results are displayed in ____.

	a graph
	two tables

	one table
	a pie chart