The table below gives information on GPAs and starting salaries
(rounded to the nearest thousand dollars) of 7 recent college
graduates.
GPA
| 2.90
3.81 3.20 2.42 3.94
2.05 2.25
Starting salary
|
38 48
38 35
50 31
37
List the independent variable ___________ and the dependent
variable_________.
Build a table, with column totals containing
x, y, x2, y2, and xy.
Calculate average of y & average of x.
Show formula & work for a, b,
SSxx,...
The following information gives information on GPAs and starting
salaries (rounded to the nearest thousand dollars) of seven recent
college graduates.
GPA 2.90 3.81 3.20 2.42 3.94 2.25 2.05
Salary 23 28 23 21 32 22 19
a. Find the regression line of the data above.
b. Use the equation of the regression line to predict the value
of the salary for a GPA of 3.00.
The following information gives information on GPAs and starting
salaries (rounded to the nearest...
The following data give the odometer mileage (rounded to the
nearest thousand miles) for all 20 cars that are for sale at a
dealership.
61
88
58
83
71
40
27
38
52
43
27
40
90
43
95
35
28
47
88
76
a. Calculate the values of the three quartiles
and the interquartile range.
Q1 =
Q2 =
Q3 =
IQR =
b. Find the approximate value of the
19th percentile.
c. Calculate the percentile rank of 71....
An expert who works for a car magazine obtained random data
(rounded to the nearest thousand) among two categories of used or
new cars:
Domestic
Foreign
The expert would like to understand sales based on list price
(rounded to the nearest thousand dollars), sale price (rounded to
the nearest thousand dollars), and number of days it takes to sell
each car. The complete data set is in the file named Cars.
Managerial Report
Prepare a report (see below) that summarizes...
45 numbers are rounded off to the nearest integer and then
summed. If the individual round-off error are uniformly distributed
over (−.5,.5) what is the probability that the resultant sum
differs from the exact sum by more than 2?
40 numbers are rounded off to the nearest integer and then
summed. If the individual round-off error are uniformly distributed
over (−.5,.5) what is the probability that the resultant sum
differs from the exact sum by more than 2 ?
For the time series below, enter the exponential smoothing
predictions, rounded to the nearest 0.01. Let alpha=0.25. Then
calculate the error and MSE.
Week
Time Series
Exponential Smoothing
Error
1
8
2
12
3
15
4
11
5
13
6
16
Mean Absolute Error:
Mean Squared Error:
Exp. Smoothed prediction for week 7:
Given the following data, what is the weighted-average cost of
ending inventory rounded to the nearest whole dollar? (Do not round
in the process of your calculations, only round your final
answer.)
Sales revenue 100 units at $15 per unit
Beginning inventory 40 units at $9 per unit
Purchases 80 units at $10 per unit
A firm has two departments: Seller and Buyer. Department Seller
provides a critical component for Department Buyer’s final product.
Department Buyer can purchase the part on the external market for
$100.Department Seller has insufficientcapacity: Department Buyer needs 500 units and Department Seller
only has excess capacity for 200 units. The following cost and
price data apply to Department Seller. External
Market
price $108 Variable
selling/distribution costs on external sales10 Variable
manufacturing
cost 40 Fixed
manufacturing cost (per unit) 25What is the minimum price that would
be...
When Ashley was asked to round 345 to the nearest 100, she
rounded 345 to 350 and then rounded 350 to 400. Billie claimed the
answer was 300. How would you respond to these students?