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A customer wants to estimate the average delivery time of a
pizza from the local pizza parlor. Over the course of a few months,
the customer orders 29 pizzas and records the delivery times. The
average delivery time is 20.3 with a standard deviation of 8.694.
If the customer estimates the time using a 95% confidence interval,
what is the margin of error? Question 1 options: 1) 3.3019 2)
2.7464 3) 1.6144 4) 3.307 5) 0.7836
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Question 7 (1 point)
The owner of a local golf course wants to determine the average
age of the golfers that play on the course in relation to the
average age in the area. According to the most recent census, the
town has an average age of 55.89. In a random sample of 30 golfers
that visited his course, the sample mean was 45.84 and the standard
deviation was 6.514. Using this information, the owner calculated
the confidence interval of...
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The owner of a local golf course wants to estimate the
difference between the average ages of males and females that play
on the golf course. He samples a group of men and women and then
uses the sample statistics to calculate a 99% confidence interval
of (6.28, 21.77). This interval estimates the difference of (the
average age of men - the average age of women). What can we
conclude from this interval?
Question 8 options:
1)
We are 99%...
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A local pizza place claims that they average a delivery time of
10.14 minutes. To test this claim, you order 13 pizzas over the
next month at random times on random days of the week. You
calculate that the average delivery time is 8.59 minutes with a
standard deviation of 1.721 minutes. You create a 99% confidence
interval of (7.13, 10.05). Of those listed below, what is the best
conclusion you can make?
Question 7 options:
1)
The percentage of...
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ndependent random samples are taken at a university to compare
the average GPA of seniors to the average GPA of sophomores. Given
a 95% confidence interval for the difference between the true
average GPAs (seniors - sophomores) of (0, 1.13), what can you
conclude?
Question 9 options:
1)
We are 95% confident that the difference between the two sample
GPAs falls within the interval.
2)
We are 95% confident that the average GPA of seniors is greater
than the average...
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The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 27 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 27 golfers play a round of golf on his friend's course and records their scores again. The average difference in the scores (treated as the scores on his course - the scores on...
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1. You own a small storefront retail business and are interested
in determining the average amount of money a typical customer
spends per visit to your store. You take a random sample over the
course of a month for 8 customers and find that the average dollar
amount spent per transaction per customer is $106.745 with a
standard deviation of $13.7164. Create a 95% confidence interval
for the true average spent on all customers per transaction.
Question 1 options:
1)...
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The owner of a golf course wants to determine if his golf course
is more difficult than the one his friend owns. He has 21 golfers
play a round of 18 holes on his golf course and records their
scores. Later that week, he has the same 21 golfers play a round of
golf on his friend's course and records their scores again. The
average difference in the scores (treated as the scores on his
course - the scores on...
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The owner of a local supermarket wants to estimate the
difference between the average number of gallons of milk sold per
day on weekdays and weekends. The owner samples 24 weekdays and
finds an average of 242.462 gallons of milk sold on those days with
a standard deviation of 36.143. 28 Saturdays and Sundays are
sampled and the average number of gallons sold is 335.717 with a
standard deviation of 43.83. If a 95% confidence interval is
calculated to estimate...
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You are curious about the average number of yards Matthew
Stafford throws for each game for the Detroit Lions. You randomly
select 23 games and see that the average yards per game is 344.5
with a standard deviation of 27.8 yards. You want to create a 95%
confidence interval for the true average number of yards per game
he throws. What is the margin of error for this estimate?
Question 1 options:
1)
1.5833
2)
5.7967
3)
12.0216
4)
9.9538...