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Question
The ages of students in a class have been put into the frequency distribution below.| Age | Number of Students |
| 18 | 3 |
| 19 | 5 |
| 20 | 28 |
| 21 | 4 |
What is the median age of these students?
a) 18
b) 19
c) 19.5
d) 20
e) 20.5
Answer
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Related questions
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Q:
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Q:
The mean square error (MSerr) is calculated by dividing the sum of squares error (SSerr) by the number of error degrees of freedom (dferr).
Q:
Annie Mikhail, market analyst for a national company specializing in historic city tours, is analyzing the relationship between the sales revenue from historic city tours and the size of the city. She gathers data from six cities in which the tours are offered. Annie's dependent variable is annual sales revenues and her independent variable is the city population. Regression analysis of the data yielded the following tables. Coefficients
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Q:
Annie Mikhail, market analyst for a national company specializing in historic city tours, is analyzing the relationship between the sales revenue from historic city tours and the size of the city. She gathers data from six cities in which the tours are offered. Annie's dependent variable is annual sales revenues and her independent variable is the city population. Regression analysis of the data yielded the following tables. Coefficients
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MS
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3.550325
3.550325
63.20809 r2 = 0.940483 Residual
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0.224675
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3.775 Annie's sample size is __________.
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Q:
Annie Mikhail, market analyst for a national company specializing in historic city tours, is analyzing the relationship between the sales revenue from historic city tours and the size of the city. She gathers data from six cities in which the tours are offered. Annie's dependent variable is annual sales revenues and her independent variable is the city population. Regression analysis of the data yielded the following tables. Coefficients
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3.550325
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0.224675
0.056169 Total
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Q:
A manager wants to predict the cost (y) of travel for salespeople based on the number of days (x) spent on each sales trip. The following model has been developed: y = $400 + 120x. If a trip took 4 days, the predicted cost of the trip is _____________.
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Q:
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Q:
The proportion of variability of the dependent variable accounted for or explained by the independent variable is called the _______.
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The numerical value of the coefficient of determination must be _______.
a) between -1 and +1
b) between -1 and 0
c) between 0 and 1
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Q:
A standard deviation of the error of the regression model is called the _______.
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Q:
The following residuals plot indicates _______________. a) a nonlinear relation
b) a nonconstant error variance
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