DSOM QUIZ 6 AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED LATEST UPDATE
The purpose of statistical inference is to make estimates or draw conclusions
about a
population based upon information obtained from the sample.
The value of the ___________ is used to estimate the value of the population
parameter.
sample statistic
In order to determine an interval for the mean of a population with unknown
standard deviation, a sample of 24 items is selected. The mean of the sample is
determined to be 23. The number of degrees of freedom for reading the t value is
23
A sample of 37 AA batteries had a mean lifetime of 584 hours. A 95% confidence
interval for the population mean was 579.2 < μ < 588.8. Which statement is the
correct interpretation of the results?
We are 95% confident that the mean lifetime of all the bulbs in the population is
between 579.2 hours and 588.8 hours.
Two approaches to drawing a conclusion in a hypothesis test are
p-value and critical value.
A pizza shop advertises that they deliver in 30 minutes or less or it is free. People
who live in homes that are located on the opposite side of town believe it will take
the pizza shop longer than 30 minutes to make and deliver the pizza. A random
SOLUTIONS VERIFIED LATEST UPDATE
The purpose of statistical inference is to make estimates or draw conclusions
about a
population based upon information obtained from the sample.
The value of the ___________ is used to estimate the value of the population
parameter.
sample statistic
In order to determine an interval for the mean of a population with unknown
standard deviation, a sample of 24 items is selected. The mean of the sample is
determined to be 23. The number of degrees of freedom for reading the t value is
23
A sample of 37 AA batteries had a mean lifetime of 584 hours. A 95% confidence
interval for the population mean was 579.2 < μ < 588.8. Which statement is the
correct interpretation of the results?
We are 95% confident that the mean lifetime of all the bulbs in the population is
between 579.2 hours and 588.8 hours.
Two approaches to drawing a conclusion in a hypothesis test are
p-value and critical value.
A pizza shop advertises that they deliver in 30 minutes or less or it is free. People
who live in homes that are located on the opposite side of town believe it will take
the pizza shop longer than 30 minutes to make and deliver the pizza. A random
