BUS 204 Week 10 Quiz | MiraCosta College
- MiraCosta College / BUS 204
- 18 Jun 2021
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- Management Assignment Help / Business Management Assignment Help
BUS 204 Week 10 Quiz | MiraCosta College
Question 1
Which of the
following statements applies to a point estimate?
The point estimate
will tend to be accurate if the sample size exceeds 30 for non-normal
populations.
The point estimate is
needed to determine the required sample size when estimating the population
mean.
The point estimate is
a parameter.
The point estimate is
subject to sampling error and will almost always be different from the
population value.
Question 2
The general format
for a confidence interval is:
margin of error ±
(confidence coefficient) (standard error).
point estimate ±
(critical value)(standard deviation)
point estimate ±
(critical value)(standard error).
point estimate ± z
(standard deviation).
Question 3
If a decision maker
wishes to reduce the margin of error associated with a confidence interval
estimate for a population mean, she can:
increase the sample
size.
use the
t-distribution.
decrease the sample
size.
increase the
confidence level.
Question 4
A toy store wants to
estimate the mean number of purchases online daily. The standard deviation is
known. If they want to find a 99 percent confidence interval the critical value
to use is:
2.33
1.645
1.98
2.575
Question 5
When small samples
are used to estimate a population mean, in cases where the population standard
deviation is unknown:
the resulting margin
of error for a confidence interval estimate will tend to be fairly small.
the t-distribution
must be used to obtain the critical value.
there will be a large
amount of sampling error.
None of the above
Question 6
A Parks and
Recreation official surveyed 200 people at random who have used one of the
city's parks. The survey revealed that 26 resided outside the city limits. If
she had to arrive at one single value to estimate the true proportion of park
users who are residents of the city it would be 0.13.
True
False
Question 7
When determining the
sample size for a proportion, if you have no previous information available to
estimate p, then the best value to use is π = 0.5.
True
False
Question 8
A 95 percent
confidence interval for a mean can be interpreted that we are 95 percent sure
that our answer is correct.
True
False
USA 
India