Question

explanation not required

Question 33

A sampling distribution is a distribution of scores in a population.

Select one:

True

False

Q 34

Question 34

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between one continuous and one dichotomous variable is the

Select one:

a. Spearman rank-order correlation coefficient

b. None of these

c. Phi correlation coefficient

d. Point-biserial correlation coefficient

Q 35

Question 35

Three assumptions for a correlation are homoscedasticity, linearity, and normality.

Select one:

True

False

Answer #1

1) True

2) d. Point biserial correlation coefficient

3) True

No explanation required;
Question 1
A two-independent-sample t-test is computed when mean
differences are compared between TWO OR MORE groups sampled from a
population with an unknown variance.
Select one:
True
False
Q 2
Question 2
A counselor records the number of disagreements (per
session) among couples during group counseling sessions. If the
number of disagreements is distributed normally with a mean of 4.4
disagreements and a standard deviation of 0.4, then what proportion
of couples disagree at least four...

The Central Limit Theorem indicates that in selecting random
samples from a population, the sampling distribution of the the
sample mean x-bar can be approximated by a normal distribution as
the sample size becomes large.
Select one: True False

QUESTION 1
Research that analyzes a portion of an entire population is
carried out on a:
a. sample
b. population
c. census
d. survey
QUESTION 2
__________ results in a difference between the sample and
population regardless of how well the sampling plan has been
designed.
a. measurement error
b. sampling error
c. human error
d. sigma erroneous
QUESTION 3
Which variety of nonrandom sampling takes proportions into
consideration?
a. Convenience
b. Judgment
c. Quota
d. Purposive
QUESTION 4...

1.One of the conditions for the sampling distribution of the
sample proportion to be normal is that one should observe at least
5 successes and at least 5 failures.
True
False
2.The standard error for the sample proportion depends on the
population proportion.
True
False
3.If the 95% confidence interval for one population proportion
is given by 0.22 to 0.33, then the sample proportion is 0.275.
True
False
4.As one increases the sample size, the margin of error in the...

TRUE OR FALSE:
1. The sampling distribution of (X-bar) is
always a normal distribution according to the Central limit
theorem.
4. If the sampled population is a normal distribution, then the
sampling distribution of (X-bar is normal only for a
large enough sample size.
5. If p=.8 and n=50, then we can conclude that the sampling
distribution of the proportions is approximately a normal
distribution.
8. Assuming the same level of significancea, as the
sample size increases, the critical t-value...

Question 31 (1 point)
A decrease in the price of gasoline will cause an increase in
the supply of gasoline.
Question 31 options:
True
False
Save
Question 32 (1 point)
When there is a decrease in both supply and demand, the effect
on equilibrium price is indeterminate(or ambiguous).
Question 32 options:
True
False
Save
Question 33 (1 point)
An increase in demand accompanied by an increase in supply will
increase the equilibrium quantity but the effect on equilibrium
price will...

A hypothesis test using a Pearson’s correlation coefficient is
an example of what?
A nonparametric statistic
A descriptive statistic
An inferential statistic
A power statistic
1 points
QUESTION 48
What would the scatter plot show for data that produce a Pearson
correlation of r = +0.88?
Points clustered close to a line that slopes down to the
right
Points clustered close to a line that slopes up to the right
Points widely scattered around a line that slopes up...

QUESTION 28
The only person allowed to obtain informed consent from a
research participant in a clinical trial is the principal
investigator.
True
False
3 points
QUESTION 29
Place the following research activities in ascending order by
the phase of clinical research where they occur.
- 1.
2. 3.
4.
Expand indications
- 1.
2. 3.
4....

Question 1 2.5 pts 1. The perfectly competitive firm's demand
curve is horizontal at the market price. True False Flag this
Question Question 2 2.5 pts 2. In perfect competition, the market
price is established at the intersection of the market demand and
market supply curves in the industry and the individual firms are
"price takers" of that market price. True False Flag this Question
Question 3 2.5 pts 3. The perfectly competitive firm will continue
to produce in the...

Multiple Choice
Select the best answer from the available choices for each
question.
Which of the following is NOT part of the definition of
a sample space S?
S can be discrete or continuous
Each outcome must be in S at most once
Each element in S is equally likely
Each outcome must be in S at least once
S is a set of possible outcomes in an experiment
Three A’s, three B’s, and two C’s are arranged at
random...

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