Question
In: Statistics and Probability
how you recognize when an inferential statistics problem involves either a confidence interval estimate or a...
how you recognize when an inferential statistics problem involves
either a confidence interval estimate or a hypothesis testing
procedure and when it involves either a mean or a
proportion.
Solutions
orchestra answered 3 years agoRelated Solutions
Distinguish between point estimate and confidence interval. How do you construct confidence interval when population SD...
Distinguish between point estimate and
confidence interval. How do you construct confidence interval when
population SD is known and unknown?
1.) A confidence interval was used to estimate the proportion of statistics students that are females....
1.) A confidence interval was used to estimate the proportion of
statistics students that are females. A random sample of 72
statistics students generated the following 90% confidence
interval: (0.438, 0.642). Which of the following interpretations is
correct?
Select one:
A. 90% of the sampled students are female.
B. We are 90% confidence that proportion of all statistics
female students falls in the interval 0.438 to 0.642
C. 90% of all statistic students are female.
D. We are 90% confident...
The length of a confidence interval changes when either the confidence level changes or the sample...
The length of a confidence interval changes when either the
confidence level changes or the sample size changes. To illustrate
this, imagine a statistician takes a sample from a population with
a population standard deviation of 2. The sample mean is calculated
to be 10. Construct 3 different confidence intervals:
3a) Assume the sample size is 30 and the confidence level is
95%
3b) Assume the sample size is 30 and the confidence level is
90%
3c) Assume the sample...
The length of a confidence interval changes when either the confidence level changes or the sample...
The length of a confidence interval changes when either the
confidence level changes or the sample size changes. To illustrate
this, imagine a statistician takes a sample from a population with
a population standard deviation of 2. The sample mean is calculated
to be 10. Construct 3 different confidence intervals:
3a) Assume the sample size is 30 and the confidence level is
95%
3b) Assume the sample size is 30 and the confidence level is
90%
3c) Assume the sample...
Classify the following descriptions as either Inferential statistics or descriptive statistics. Enter I if it is...
Classify the following descriptions as either Inferential
statistics or descriptive statistics. Enter I if it is inferential
statistics. Enter D if it is descriptive statistics.
The average age of the students enrolled in Statistics last
semester was 29.7 years old.
There is a relationship between attending class and the grade
you receive in the class.
Based on a random sample, it was concluded that the average cost
of a hotel room in Chicago was greater than one in Atlanta.
A...
What is the primary purpose of inferential statistics? How might inferential statistics be spplied to the...
What is the primary purpose of inferential statistics? How might
inferential statistics be spplied to the effectiveness of physicsl
activity in the workplace
Use the confidence interval and the indicated sample data to calculate a confidence interval to estimate...
Use the confidence interval and the indicated sample data to
calculate a confidence interval to estimate the population
mean.
SD = standard deviation
a) Salaries of university graduates who took a course in
statistics at the university: 95% confidence, n = 41, mean = $ 67,
200, and the standard deviation is known to be $ 18,277.
B) The speeds of drivers fined in a speed limit zone of 55 mi /
h: 95% confidence, n = 90, mean =...
in the book statistics for managers, 8th edition, question 8.2 constructing a 99% confidence interval estimate...
in the book statistics for managers, 8th edition, question 8.2
constructing a 99% confidence interval estimate for the population
mean, the solution on Chegg says that "let the level of
significance be a=.01? Where does that number come from and how do
they convert that number to 2.576?
Determine the margin of error for a 99% confidence interval to estimate the population mean when...
Determine the margin of error for a 99% confidence interval to
estimate the population mean when s = 43 for the sample sizes
below. a) n=12 b) n=25 c) n=46 a) The margin of error for a
99% confidence interval when n=12 is _.
Determine the margin of error for a 99% confidence interval to estimate the population mean when...
Determine the margin of error for a 99% confidence interval to
estimate the population mean when s=45 for the sample sizes of
n=15, n=34, n=54. (Find the margin of error for each interval when
n=x)
Determine the margin of error for a confidence interval to
estimate the population mean with n=24 and s=12.3 for confidence
levels 80%, 90%, 99%.
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