QUESTION 2 A sportswriter wants to know how strongly Lafayette residents support
ID: 3350683 • Letter: Q
Question
QUESTION 2
A sportswriter wants to know how strongly Lafayette residents support the local minor league baseball team, the Lafayette Leopards. She stands outside the stadium before a game and interviews the first 20 people who enter the stadium.
The newspaper asks you to comment on their survey of local opinion. You say:
The is a simple random sample. The results are not biased, but the sample is too small to have high precision.
The sampling method is biased. It will almost certainly overestimate the level of support among all Lafayette residents.
This is a census, because all fans had a chance to be asked. It gives very accurate results.
This is a random sample. It gives very accurate results.
The sampling method is biased. It will almost certainly underestimate the level of support among all Lafayette residents.
4.00000 points
QUESTION 3
We wish to choose a simple random sample of size three from the following employees of a small company.
To do this, we will use the numerical labels attached to the names above. We will also use the following list of random digits, reading the list from left to right, starting at the beginning of the list.
11793 20495 05907 11384 44982 20751 27498 12009 45287 71753 98236 66419
The simple random sample is:
117
Bechhofer, Taylor, Weiss
Bechhofer, Bechhofer again, and Taylor
Taylor, Weiss, Ito
Kesten, Kiefer, Taylor
4.00000 points
QUESTION 4
The following scatterplot presents data on wine consumption and death rate from heart attacks in 19 developed Western countries. The scatterplot shows that:
the amount of wine a country drinks is not related to its heart disease death rate.
countries that drink more wine have higher death rates from heart disease.
heart disease deaths is the explanatory variable.
country is the explanatory variable.
countries that drink more wine have lower death rates from heart disease.
a.The is a simple random sample. The results are not biased, but the sample is too small to have high precision.
b.The sampling method is biased. It will almost certainly overestimate the level of support among all Lafayette residents.
c.This is a census, because all fans had a chance to be asked. It gives very accurate results.
d.This is a random sample. It gives very accurate results.
e.The sampling method is biased. It will almost certainly underestimate the level of support among all Lafayette residents.
Explanation / Answer
For question no. 2 the option e is correct.
For question no. 3 the options b, d ,e are correct.
In question no 4 the scatter diagram is not clearly visible.