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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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
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