Question

Indicate whether the following statements are true or false. If we took a random sample of 35 subjects from some population, the associated sampling distribution of the mean would have the following properties: (a) Shape would approximate a normal curve. (b) Mean would equal the one sample mean. (c) Shape would approximate the shape of the population. (d) Compared to the population variability, the variability would be reduced by a factor equal to the square root of 35. (e) Mean would equal the population mean. (f) Variability would equal the population variability.

Answer #1

Indicate whether the
following statement is true or false.
The sampling
distribution of the sample mean (x-bar) will at least approximately
be normally distributed either if X is normally distributed or if
the sample size (n) is larger than 30.

Indicate whether the following statement is true or false. The
sampling distribution of the sample mean (top enclose X) will at
least approximately be normally distributed either if X is normally
distributed or if the sample size (n) is larger than 30.

For each of the following statements, identify whether the
statement is true or false, and explain why. Please limit each
response to no more than 3 sentences.
i) A p-value is the probability that the null hypothesis is
false. ii) A chi-square test statistic can never be negative.
iii) If we reject the null hypothesis that a population
proportion is equal to a specific value, then that specific value
will not be contained in the associated confidence interval.
iv) If...

For each of the following statements, identify whether the
statement is true or false, and explain why. Please limit each
response to no more than 2 sentences.
f) A weighted mean is preferred over an unweighted mean (i.e. a
regular sample mean) when each observation has its own unique
weight.
g) A z-score is a percentile.
h) Assuming the population is normally distributed, the standard
deviation of the sampling distribution of the sample mean will
always be less than or...

True or False: Indicate whether each of the following
statements is true or false and explain why.
4. The industry supply curve could be downward sloping in the
long run.
The market for apartment rentals is in equilibrium when the
rent is $1000 per month and the quantity of apartments rented is
2,000. A rent control law is passed that sets the maximum rent at
$800. If the elasticity of demand for apartments is 1.2 and the
elasticity of supply...

Section 2: True or False
Please indicate whether the following statements are True,
False, or Undetermined.
Statement
True
False
Undetermined
Two variables that are highly correlated are causally
related.
Observed points closest to the regression line are given more
weight than points far away (i.e., outliers).
The standard deviation is only useful as a measure of dispersion
for normally distributed variables.
Two variables that have no observed correlation cannot be
causally related.
When a survey sample has a potential bias...

State whether each of the following is True or
False.
a. A smaller sample could provide less sampling error than a larger
sample from a given population.
b. The correct critical value a lower tail hypothesis test when
sigma is unknown, the sample size = 15, and alpha = 0.05 is
-1.645.
c. A larger sample size can reduce the potential for extreme
sampling error.
d. It is impossible for the population mean to equal the mean of a
sample...

Indicate whether each of the following five statements are True
or False.
1) A large p-value indicates the null hypothesis must be
true.
2) Increasing the confidence level decreases the sample size needed
to achieve a desired margin of error.
3) Increasing the sample size decreases the power of a hypothesis
test.
4) Increasing the significance level increases the power of a
hypothesis test.
5) If the interaction term in a two factor experiment is
significant (small p-value), the main...

Indicate whether the following statement is true or false.
Along an IS curve there are no unplanned changes in
inventories.
True
False

Indicate whether the following statement is true or false.
If we do not reject the null hypothesis, it is possible we have
made both type I and type II errors.
In an upper tail hypothesis test for the mean, the critical
value is 2.575 and the test statistic is 2.5. In this case, the
null hypothesis should not be rejected.
The calculated p-value should be divided by 2 to make the
decision for a two tail test.
The sampling error...

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