Question
In: Statistics and Probability
Suppose that we randomly select 50 billing statements from each of the computer databases of the...
Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table.
| Hotel A | Hotel B | Hotel C | |
|---|---|---|---|
| Sample Average ($) | 140 | 180 | 120 |
|
Sample Standard Deviation |
17.7 | 22.6 | 12.5 |
(a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.)
$______ to $______
(b)Find a 99% confidence interval for the difference in the average room rates for the Hotel B and the Hotel C chains. (Use Hotel B − Hotel C. Round your answers to two decimal places.)
$______ to $______
Solutions
orchestra answered 1 year agoRelated Solutions
Suppose that we randomly select 50 billing statements from each of the computer databases of the...
Suppose that we randomly select 50 billing statements from each
of the computer databases of the Hotel A, the Hotel B, and the
Hotel C chains, and record the nightly room rates. The means and
standard deviations for the data are given in the table.
Hotel A
Hotel B
Hotel C
Sample Average ($)
140
180
120
Sample Standard
Deviation
17.7
22.6
12.5
(a) Find a 95% confidence interval for the difference in the
average room rates for the Hotel...
Suppose that we randomly select 50 billing statements from each of the computer databases of the...
Suppose that we randomly select 50 billing statements from each
of the computer databases of the Hotel A, the Hotel B, and the
Hotel C chains, and record the nightly room rates. The means and
standard deviations for the data are given in the table.
Hotel A
Hotel B
Hotel C
Sample Average ($)
140
180
120
Sample Standard
Deviation
17.7
22.6
12.5
(a) Find a 95% confidence interval for the difference in the
average room rates for the Hotel...
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Suppose that 8% of all Canadians are left-handed.
A) If we randomly select 200 Canadians, what is the approximate
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1). Suppose we install a new billing system that we believe will have an average pay...
1). Suppose we install a new billing system that we believe will
have an average pay cycle of 19.5 days with a standard deviation of
4.2 days. If we draw a sample of 65 invoices from the population of
paid invoices at our location, with a mean paid time of 18.107
days. If the population mean is actually 19.5 days what is the
probability of observing a sample from that population with a mean
of 18.07 days.
2). An automaker...
The probability that a randomly selected person is left-handed is 0.1. Suppose we are to randomly...
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Suppose we have a random sample of size 50 from a N(μ,σ2) PDF. We wish to...
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̄ = 13.4508 and s2 = 65.8016. (a) Find the critical
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decision? (b) What is the p-value for your decision? (c) What is a
95% confidence interval for μ?
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