Question
In: Statistics and Probability
Warren County Telephone Company claims in its annual report that “the typical customer spends $61 per...
|
Warren County Telephone Company claims in its annual report that “the typical customer spends $61 per month on local and long-distance service.” A sample of 12 subscribers revealed the following amounts spent last month. |
|
$64 |
$65 |
$64 |
$68 |
$58 |
$64 |
$68 |
$63 |
$64 |
$60 |
$54 |
$67 |
| a. |
What is the point estimate of the population mean? (Round your answer to 3 decimal places.) |
| Estimated population mean | $ |
| b. |
Develop a 95% confidence interval for the population mean. (Use t Distribution Table.) (Round your answers to 3 decimal places.) |
| Confidence interval for the population mean | $ and $ |
| c. | Is the company's claim that the "typical customer" spends $61 per month reasonable? | ||||
|
Solutions
orchestra answered 3 years agoRelated Solutions
Warren County Telephone Company claims in its annual report that “the typical customer spends $61 per...
Warren County Telephone Company claims in its annual report that
“the typical customer spends $61 per month on local and
long-distance service.” A sample of 12 subscribers revealed the
following amounts spent last month. $63 $67 $65 $68 $60 $65 $68 $62
$64 $63 $54 $67
a. What is the point estimate of the population mean? (Round
your answer to 3 decimal places.)
Estimated population mean $:
b. Develop a 98% confidence interval for the population mean.
(Use t Distribution...
Warren County Telephone Company claims in its annual report that “the typical customer spends $60 per...
Warren County Telephone Company claims in its annual report that
“the typical customer spends $60 per month on local and
long-distance service.” A sample of 12 subscribers revealed the
following amounts spent last month. $64 $63 $63 $68 $56 $64 $68 $62
$64 $54 $54 $69
a. What is the point estimate of the population mean? (Round
your answer to 3 decimal places.)
Estimated population mean $
b. Develop a 98% confidence interval for the population mean.
(Use t Distribution...
Warren County Telephone Company claims in its annual report that "the typical customer spends $60 per...
Warren County Telephone Company claims in its annual report that
"the typical customer spends $60 per month on local and
long-distance service." A sample of 12 subscribers revealed the
following amounts spent last month.
$63
$65
$64
$67
$56
$65
$68
$63
$64
$62
$55
$67
(a)
What is the point estimate of the population mean?
(Round your answer to 3 decimal places. Omit
the "$" sign in your response.)
Estimated population mean
$
(b)
Develop a 99 percent confidence...
Congo Incorporated claimed in its annual report that "the typical customer spends $65 per month on...
Congo Incorporated claimed in its annual report that "the
typical customer spends $65 per month on streaming apps." A sample
of 12 subscribers revealed the following amounts spent last
month.
$57
$69
$60
$68
$66
$65
$63
$64
$67
$59
$58
$58
(a)
What is the point estimate of the population mean?
(Round your answer to 3 decimal places.)
Population mean
$
(b)
Determine the 90% confidence interval for the population mean.
(Round your answers to 2 decimal places.)
Confidence...
A telephone company claims that 20% of its customers have a landline telephone. The company selects...
A telephone company claims that 20% of its customers
have a landline telephone. The company selects a random sample of
500 customers and finds that 88 have a landline. At a .05 level of
significance, is the company’s claim valid. Use the P-value
approach. Clearly state the null and alternative hypothesis, locate
the claim and state the decision.
A telephone company claims that 20% of its customers have a landline telephone. The company selects...
A telephone company claims that 20% of its customers
have a landline telephone. The company selects a random sample of
500 customers and finds that 88 have a landline. At a .05 level of
significance, is the company’s claim valid. Use the P-value
approach. Clearly state the null and alternative hypothesis, locate
the claim and state the decision.
C) A recent report in Pasadena Times indicated a typical family of four spends $490 per...
C) A recent report in Pasadena Times indicated a typical
family of four spends $490 per month on food. Assume the
distribution of food expenditures for a family follows the normal
distribution, with a standard deviation of $90 per month.
What percent of the families spend between $300 and $490 per
month on food?
What is the probability that a families selected spends less
than $430 per month on food?
What percent spend between $430 and $600 per month on...
Suppose that a typical customer at a local restaurant spends 20 minutes in the store. It...
Suppose that a typical customer at a local restaurant spends 20
minutes in the store. It is estimated that the average number of
customers in the restaurant is 4. Assume that the service time in
this restaurant is random with some known distribution. How many
customers does the restaurant serve during a typical hour that it
is open? Suppose the restaurant wants to decrease the average
number of customers in the restaurant at any time. However, assume
it cannot control...
A telephone company claims that less than 20% of its customers have at least two telephone...
A telephone company claims that less than 20% of its customers
have at least two telephone lines. The company selects a random
sample of 500 customers and finds that 88 have two or more
telephone lines. Use LaTeX: \alpha α = 0.05 and the P-value method.
Correctly state a) your conclusion about what to do with H0 AND b)
your conclusion about the claim that is being made.
A company spends $120,000 on equipment. The annual benefit is $1,850. The company spends $13,000 and...
A company spends $120,000 on equipment. The annual benefit is
$1,850. The company spends $13,000 and $16,500, at the end of 3
years and 5 years. And, lastly salvaged with $27,000 at the end of
it's 8 year life. After 8 years the company wants to find EUAB over
8 years. How much is it?
Int. rate = 9%
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