Answer & Explanation:Please check my answers and correct them if they’re wrong. I have highlighted my answers.
algebra_2_data_gathering_and_analyzing_part_1.docx
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1. *
3 points
A.
B.
C.
D.
E.
Population Mean: 7.7; Sample Mean: 7.3
Population Mean: 7.2; Sample Mean: 7.3
Population Mean: 7.3; Sample Mean: 6.5
Population Mean: 7.3; Sample Mean: 7.7
None of the above
2. Identify all the Parameters from this list of statements. * 3 points
A. 85% of the golf teams surveyed have teammates that can break 80.
B. According to the survey, each member of the soccer team has an
average of 2 jerseys.
C. Twelve of the 35 members of our book club play chess.
D. Of the 28 swim teams surveyed across America, 5 of them practice 10
hours a week.
E. Basketball teams in the district have won at least 3 games for every 5
they have played.
F. 78% of the booths at the fair sell food.
3. * 3 points
A. Place 15 equally sized pieces of paper in a hat. Of the 15, 3 read
“rotten”, and the rest say “not rotten”
B. Place 12 equally sized pieces of paper in a hat. Of the 12, 3 read
“rotten”, and the rest say “not rotten”.
C. Place 20 equally sized pieces of paper in a hat. Of the 20, 3 read
“rotten”, and the rest say “not rotten”.
D. Place 30 equally sized pieces of paper in a hat. Of the 30, 3 read
“rotten”, and the rest say “not rotten”.
4. * 3 points
A. Yes, the number generator is fair. It only picked black socks half the
time.
B. No, the number generator is not fair. The correct percentage of black
socks was not chosen at all.
C. No, the number generator is not fair. In two experiments, it picked black
socks 50% of the time two times.
D. Yes, the number generator is fair. It picked the approximate percentage
of black socks most of the time.
5. * 3 points
A.
B.
C.
D.
About 85% of the town most likely belongs to the fitness center.
Most likely, 30% of the town does not belong to the fitness center.
Most likely, 70% to 85% of the town belongs to the fitness center.
Most likely, 50% of the town skateboards.
6. * 3 points
A.
B.
C.
D.
Margin of error: 6.92; Interval Estimate: (105.04, 111.96)
Margin of error: 6.92; Interval Estimate: (101.58, 115.42)
Margin of error: 3.46; Interval Estimate: (105.04, 111.96)
Margin of error: 3.46; Interval Estimate: (101.58, 115.42)
7. * 3 points
A.
B.
C.
D.
Point Estimate: 7%; Margin of Error: ±31%
Point Estimate: 14%; Margin of Error: ±14%
Point Estimate: 31%; Margin of Error: ±7%
Point Estimate: 31%; Margin of Error: ±14%
8. * 3 points
A. Enter all members’ names into a computer software program that will
randomly pick the 500 members.
B. Pick a letter from the alphabet and the first 500 members whose first or
last name begins with that letter will be in the survey.
C. Let the gym management decide which members should be surveyed.
D. Choose the 500 members who have the highest attendance rates.
9. Identify if the situation describes a survey, an experiment or an
observational study? A coach wants to know who his fastest runner
is. * 3 points
A. This describes a survey.
B. This describes an experiment.
C. This describes an observational study.
10. Identify if the situation describes a survey, an experiment or an
observational study? The investigators analyze data based on a set of
responses to questions. * 3 points
A. This describes a survey.
B. This describes an experiment.
C. This describes an observational study.
11. A person wants to count the number of children that play at a
playground. He observes the playground for longer than an hour. In
what way(s) is randomization not applied in this situation? (Select
each correct answer.) * 3 points
A.
B.
C.
D.
E.
There is no selection process.
The person observing chose the time frame of longer than one hour.
There is no control over who is in the study.
The person is only observing children.
The person observing can select a group to go to the park.
12. *
3 points
A. The question is biased towards a response of preferring to use free
weights.
B. The question is not biased.
C. The question is biased towards a response of preferring to use weight
lifting machines.
D. The sample is not biased.
E. The sample is biased because it does not represent the population.
…
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