Question
In: Statistics and Probability
An Internet retailer would like to investigate the relationship between the amount of time in minutes...
An Internet retailer would like to investigate the relationship between the amount of time in minutes a purchaser spends on its Web site and the amount of money he or she spends on an order. The table to the right shows the data from a random sample of 12 customers. Construct a 90% confidence interval for the regression slope. Construct a 90% confidence interval for the slope. LCL equals nothing and UC Lequals nothing (Round to three decimal places as needed.)
| Time | Order_Size |
| 20 | 64 |
| 12 | 25 |
| 26 | 92 |
| 21 | 202 |
| 1 | 51 |
| 16 | 37 |
| 5 | 60 |
| 38 | 362 |
| 7 | 127 |
| 34 | 157 |
| 24 | 80 |
| 9 | 246 |
Solutions
orchestra answered 2 years agoRelated Solutions
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Suppose a government department would like to investigate the
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Footage
Cost ($)
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330
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2,610
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Suppose a government department would like to investigate the relationship between the cost of heating a...
Suppose a government department would like to investigate the
relationship between the cost of heating a home during the month of
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a 90% confidence interval to estimate the average cost in February
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Heating
Square
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Square
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2,610
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Suppose a government department would like to investigate the relationship between the cost of heating a...
Suppose a government department would like to investigate the
relationship between the cost of heating a home during the month of
February in the Northeast and the home's square footage. The
accompanying data set shows a random sample of 10 homes. Construct
a 90% confidence interval to estimate the average cost in February
to heat a Northeast home that is 3,000 square feet.
Heating
Square
Heating
Square
Cost ($)
Footage
Cost ($)
Footage
320
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440
2,610
300
2,420
330...
Suppose a government department would like to investigate the relationship between the cost of heating a...
Suppose a government department would like to investigate the
relationship between the cost of heating a home during the month of
February in the Northeast and the home's square footage. The
accompanying data set shows a random sample of 10 homes. Construct
a 90% confidence interval to estimate the average cost in February
to heat a Northeast home that is 2,200 square feet.
Heating
Square
Heating
Square
Cost ($)
Footage
Cost ($)
Footage
330
2,420
450
2,610
280
2,430
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Suppose a government department would like to investigate the
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February in the Northeast and the home's square footage. The
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Heating Cost($) Square_Footage
340 2430
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300 2020
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Suppose an environmental agency would like to investigate the relationship between the engine size of sedans,...
Suppose an environmental agency would like to investigate the
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Use this information to complete the parts below
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size in cubic liters and rated miles per gallon for a selection of
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2.5, 25
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2.6, 25
3.3, 22
3.6, 23
2.1, 28
2.5, 23
2.1, 29
3.7, 21
a) Construct a scatter plot for the data....
Suppose an environmental agency would like to investigate the relationship between the engine size of sedans,...
Suppose an environmental agency would like to investigate the
relationship between the engine size of sedans, x, and the miles
per gallon (MPG), y, they get. The accompanying table shows the
engine size in cubic liters and rated miles per gallon for a
selection of sedans. The regression line for the data is y
hat=36.7920−4.1547x.
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A company would like to determine the relationship between: the time (in years) spent at the...
A company would like to determine the relationship between: the
time (in years) spent at the company and the employee’s hourly pay.
The data for 5 employees are listed in the table below. Calculate
and interpret the correlation coefficient r. Include a plot of the
data in your discussion.
years (X)
hourly pay (Y)
5
25
3
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4
21
10
35
15
38
a. Calculate the Pearson correlation coefficient for the
data.
b. Use an appropriate 2-tailed hypothesis test...
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