Question
William is interested in buying an tablet computer. He visited 7 stores/websites at random and recorded...
William is interested in buying an tablet computer. He visited 7 stores/websites at random and recorded the price of the particular tablet he wants. The sample of prices had a mean of $187.34 and a standard deviation of $25.1. a. What critical value should be used for a 86% confidence interval for the mean, μ? Calculate a 86% confidence interval for the mean price of this model of tablet computer.
Homework Answers
Answer #1
from above : critical value should be used for a 86% confidence interval for the mean, μ =1.700
86% confidence interval for the mean price of this model of tablet computer=171.212 ; 203.468
Not the answer you're looking for?
Similar Questions
Justin is interested in buying a digital phone. He visited 17 stores at random and recorded...
Justin is interested in buying a digital phone. He visited 17
stores at random and recorded the price of the particular phone he
wants. The sample of prices had a mean of 252.56 and a standard
deviation of 11.13.
(a) What t-score should be used for a 95% confidence interval
for the mean, μ, of the distribution?
t* =
(b) Calculate a 95% confidence interval for the mean price of
this model of digital phone:
Justin is interested in buying a digital phone. He visited 19 stores at random and recorded...
Justin is interested in buying a digital phone. He visited 19
stores at random and recorded the price of the particular phone he
wants. The sample of prices had a mean of 240.65 and a standard
deviation of 30.42.
(a) What t-score should be used for a 95% confidence interval
for the mean, μμ, of the distribution?
t* =
(b) Calculate a 95% confidence interval for the mean price of
this model of digital phone:
(Enter the smaller value in...
(1 point) Justin is interested in buying a digital phone. He visited 9 stores at random...
(1 point) Justin is interested in buying a digital phone. He
visited 9 stores at random and recorded the price of the particular
phone he wants. The sample of prices had a mean of 368.73 and a
standard deviation of 31.79.
(a) What t-score should be used for a 95% confidence interval
for the mean, μμ, of the distribution?
t* =
(b) Calculate a 95% confidence interval for the mean price of
this model of digital phone:
(Enter the smaller...
1.) Justin is interested in buying a digital phone. He visited 15 stores at random and...
1.) Justin is interested in buying a digital phone. He visited
15 stores at random and recorded the price of the particular phone
he wants. The sample of prices had a mean of 237.64 and a standard
deviation of 8.63.
(a) What t-score should be used for a 95% confidence interval
for the mean, μ, of the distribution?
t* = _____________
(b) Calculate a 95% confidence interval for the mean price of
this model of digital phone:
(Enter the smaller...
To compare prices of two local stores, a random sample of items that are sold in...
To compare prices of two local stores, a random sample of items
that are sold in both stores were selected and their price noted in
the first weekend of the year:
(12 marks)
Item
Store A
Store B
Difference (Store A - Store B)
1
1.65
1.99
-0.34
2
8.70
8.49
0.21
3
0.75
0.90
-0.15
4
1.05
0.99
0.06
5
11.30
11.99
-0.69
6
7.70
7.99
-0.29
What are the null and alternative hypothesis if we want to
confirm...
To compare prices of two grocery stores in Toronto, a random sample of items that are...
To compare prices of two grocery stores in Toronto, a random
sample of items that are sold in both stores were selected and
their price noted in the first weekend of July 2018: (12
Points)
Item
Store A
Store B
Difference (Store A - Store B)
1
1.65
1.98
-0.33
2
8.70
8.49
0.21
3
0.75
0.89
-0.14
4
1.05
0.99
0.06
5
11.30
11.99
-0.69
6
7.70
7.99
-0.29
7
6.55
6.99
-0.44
8
3.70
3.59
0.11
9
8.60...
A customer wants to estimate the average delivery time of a pizza from the local pizza...
A customer wants to estimate the average delivery time of a
pizza from the local pizza parlor. The customer wants to obtain a
sample mean that falls within 3.212 minutes of the true average
delivery time with 90% confidence. If the customer knows the
standard deviation of the delivery times of all pizzas is 11.959,
how many pizzas will need to be ordered?
Question 6 options:
1)
We do not have enough information to answer this question since
we were...
PART A) You own a small storefront retail business and are interested in determining the average...
PART A) 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 14 customers and find that the
average dollar amount spent per transaction per customer is
$109.477 with a standard deviation of $11.8571. Create a 90%
confidence interval for the true average spent for all customers
per transaction.
PART B) Researchers...
7. (07.02 MC) Oscar, a yoga instructor at Yoga for You, is interested in comparing levels...
7.
(07.02 MC)
Oscar, a yoga instructor at Yoga for You, is interested in
comparing levels of physical fitness of students attending a nearby
high school and those attending a local community college. He
selects a random sample of 210 students from the high school. The
mean and standard deviation of their fitness scores are 82 and 14,
respectively. He also selects a random sample of 210 students from
the local community college. The mean and standard deviation of
their...
Question 1 (1 point) You own a small storefront retail business and are interested in determining...
Question 1 (1 point)
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 for all customers per transaction.
Question...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 8 minutes ago
asked 11 minutes ago
asked 29 minutes ago
asked 38 minutes ago
asked 52 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago