Statistics ch 7 Exam Questions And Answers 100% Pass
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Course
Statistics
Institution
Statistics
Statistics ch 7 Exam Questions And Answers
100% Pass
A single number that estimates the value of an unknown parameter is called a _ estimate -
answerPoint
The margin of error is the product of the standard error and the _ - answerCritical value
In the confidence interval 24.3 +- 1.2 the quanti...
Statistics ch 7 Exam Questions And Answers
100% Pass
A single number that estimates the value of an unknown parameter is called a _ estimate -
answer✔Point
The margin of error is the product of the standard error and the _ - answer✔Critical value
In the confidence interval 24.3 +- 1.2 the quantity 1.2 is called the _ - answer✔Margin of error
If we increase the confidence level and keep the sample size the same, we _ the margin of error
- answer✔Increase
The confidence level is the proportion of all possible samples for which the confidence interval
will cover the true values - answer✔True
To construct a confidence interval for a population mean, we add and subtract the critical value
from the point estimate - answer✔False, margin of error
Increasing the sample size while keeping the confidence level the same will result in a narrower
confidence interval - answer✔True
If a 95% confidence interval for a population mean is 1.7<U<2.4, then the probability is 0.95
that the mean is between 1.7 and 2.3 - answer✔False
When constructing a confidence interval for a population mean u from a sample of size 12, the
number of degrees of freedom for the critical value ta/2 is_ - answer✔11
When the number of degrees of freedom is large, the student's t distribution is close to _
distribution. - answer✔Normal
The student's t curve is less spread out than the standard normal curve. - answer✔False more
The student's t distribution should not be used to find a confidence interval for u if outliers are
presented in a small sample. - answer✔True
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