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 2 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
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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
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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
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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)
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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
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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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