Question
In: Statistics and Probability
A quality control specialist for a restaurant chain takes a random sample of size 13 to...
A quality control specialist for a restaurant chain takes a random sample of size 13 to check the amount of soda served in the 16 oz. serving size. The sample mean is 13.30 with a sample standard deviation of 1.54. Assume the underlying population is normally distributed. We wish to construct a 95% confidence interval for the true population mean for the amount of soda served. What is the error bound? (Round your answer to two decimal places.)
Solutions
orchestra answered 2 years agoRelated Solutions
The management of the Diners Delight restaurant chain is in the process of establishing quality control...
The management of the Diners Delight restaurant chain is in the
process of establishing quality control charts for the time that
its service people give to each customer. Management thinks the
length of time that each customer is given should remain within
certain limits to enhance service quality. For simplicity, the data
from three samples are displayed below. In each sample, five
service people were randomly selected, and the customer service
they provided was observed. The time (in seconds) to...
The management of the Diners Delight restaurant chain is in the process of establishing quality control...
The management of the Diners Delight restaurant chain is in the
process of establishing quality control charts for the time that
its service people give to each customer. Management thinks the
length of time that each customer is given should remain within
certain limits to enhance service quality. For simplicity, the data
from three samples are displayed below. In each sample, four
service people were randomly selected, and the customer service
they provided was observed. The time (in seconds) to...
13. A television manufacturer takes a random sample of 30 customers and determines the times (after...
13.
A television manufacturer takes a random sample of 30
customers and determines the times (after purchasing) until the
televisions need servicing have a mean of 6 years and a standard
deviation of 1.2 years.
a) Determine the 95% confidence interval for the mean and
explain whether it is reasonable for the company to claim the mean
time until servicing is needed is 6.4 years.
b) Repeat a), but use a 90% interval.
c) Suppose instead a larger sample of...
Suppose now that Maria takes a new random sample of a different size. She computes the...
Suppose now that Maria takes a new random sample of a different
size.
She computes the resulting 96% confidence interval to be (2.33,
2.75) oz. It is known that the distribution of the amount of ice
cream it takes for all Maria's customers to get a brain freeze is
symmetric, unimodal, and has a standard deviation of 1.6 oz.
Calculate the sample size used to compute the above confidence
interval. Report your answer as a number (no symbols), and round...
A Physics teacher takes a random sample of size 5 from his students. Their marks in...
A Physics teacher takes a random sample of size 5 from his
students. Their marks in a written test (x)
and a practical test (y) are given in the following table.
Student
A
B
C
D
E
X
11
14
16
12
15
Y
9
12
14
13
15
(i) Find the product moment correlation coefficient. [3]
(ii) Test, at the 5% significance level, whether there is
evidence of positive correlation. [4]
The teacher takes a second random sample, this...
Suppose a 95% confidence interval for obtained from a random sample of size 13 is (3.5990,...
Suppose a 95% confidence interval for obtained from a random
sample of size 13 is (3.5990, 19.0736). Find the upper bound of a
90% confidence interval for (round off to the nearest integer).
Suppose a 95% confidence interval for obtained from a random sample of size 13 is (3.5990,...
Suppose a 95% confidence interval for obtained from a random
sample of size 13 is (3.5990, 19.0736). Find the upper bound of a
90% confidence interval for (round off to the nearest integer).
The quality control manager of a candy bar factory obtains a random sample of 10 candy...
The quality control manager of a candy bar factory obtains a
random sample of 10 candy bars, weighs them, and obtains the
following data (in gram): 19.68, 20.66, 17.26, 19.98, 22.65, 19.51,
20.36, 21.02, 22.90, 19.72 Are there outliers in this data set?
Determine the Lower and Upper Fence and make your decision based on
these measures.
if you collect a sample of size 13 with a sample mean of 54 and a...
if you collect a sample of size 13 with a sample mean of 54 and
a standard error of the mean of 6, REPORT THE P-VALUE if the test
the hypothesis that the true mean is equal to 55 using a two tailed
test
if you collect a sample of size 13 with a sample mean of 54 and a...
if you collect a sample of size 13 with a sample mean of 54 and
a standard error of the mean of 6, REPORT THE P-VALUE if the test
the hypothesis that the true mean is equal to 55 using a two tailed
test
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