Part 1: Recently, an NCAA committee voted to ban \"satellite camps\" for college
ID: 3157839 • Letter: P
Question
Part 1:
Recently, an NCAA committee voted to ban "satellite camps" for college football. This caused quite a media stir when many coaches told the media that they were not in favor of the ban. A survey was taken of fans in various parts of the country to find out their opinion. The results of the survey are in the following table.
Northeast Southeast West
For ban 44 122 31
Against ban 78 53 89
What percentage of those "for the ban" were from the Southeast?
a)
29.3%
b)
42.0%
c)
47.2%
d)
61.9%
e) 69.7%
Part 2:
The mayor of a particular city recently claimed in a press conference that he had done a tremendous job of boosting the city's economy with his policies. As evidence, he claimed that the average income for an adult city resident was $62000, which was far more than the rest of the region. An editor at the newspaper believes that the mayor's claim is too high and that the average income for city residents is actually lower. To test this, a random sample of 65 adult city residents was selected. The sample average income was $54590 and the sample standard deviation was $18632. Can the newspaper editor dispute the mayor's claim? Use a 1% significance level to test. What are the correct hypotheses?
set a)
HO: mu < $62000
HA: mu > $62000
set b)
HO: mu = $62000
HA: mu < $62000
set c)
HO: mu = $62000
HA: mu > $62000
set d)
HO: mu = $62000
HA: mu "not=" $62000
Part 3:
Some medical researchers are interested in the concentration of a particular mineral in people's blood. To estimate the population mean concentration, a random sample of 40 people was selected and their blood was drawn and tested. The sample mean concentration was 4.2 mg/dL. From a related study, the population standard deviation is known to be 1.2 mg/dL. Find a 95% confidence interval for the population mean concentration.
a) 3.6892 < mu < 4.7108
b) 3.7531 < mu < 4.6469
c) 3.8281 < mu < 4.5719
e) 4.0367 < mu < 4.3633
Part 4:
Draw observations at random from a population. As the number of observations increases, the mean of the observed values gets closer and closer to the population mean. The casino industry and the insurance industry can both essentially guarantee themselves a profit because of this principle known as
a) least squares regression
b) Simpson's paradox
Benford's law
d) the Law of Large Numbers
a)
29.3%
b)
42.0%
c)
47.2%
d)
61.9%
e) 69.7%
Part 2:
The mayor of a particular city recently claimed in a press conference that he had done a tremendous job of boosting the city's economy with his policies. As evidence, he claimed that the average income for an adult city resident was $62000, which was far more than the rest of the region. An editor at the newspaper believes that the mayor's claim is too high and that the average income for city residents is actually lower. To test this, a random sample of 65 adult city residents was selected. The sample average income was $54590 and the sample standard deviation was $18632. Can the newspaper editor dispute the mayor's claim? Use a 1% significance level to test. What are the correct hypotheses?
set a)
HO: mu < $62000
HA: mu > $62000
set b)
HO: mu = $62000
HA: mu < $62000
set c)
HO: mu = $62000
HA: mu > $62000
set d)
HO: mu = $62000
HA: mu "not=" $62000
Explanation / Answer
these are 4 different questions and will be solved separetely, i will give u solution of 1st for rest repost again
1) the total who votes for the ban = 44 + 122 + 31 = 197
the proportion of that from south east = 122/197 = 61.9%
hence option D is correct