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Montano1993 [528]
3 years ago
6

Global use of cell phones grew rapidly between 1989 and 2000. below is a scatterplot of the percentage of people in the world wh

o are cell phone subscribers versus year for this time interval, along with the residual plot from a linear regression analysis. (a) is a linear model appropriate for these data? justify your answer. (b) below is a scatterplot of the natural logarithm of cell phone subscribers vs. year. this relationship is clearly more linear that the one above. does this suggest that the relationship between cell phone subscribers and year can be modeled by an exponential function or by a power function? explain. (c) computer output from the regression of ln (cell phone subscribers) vs. year is given below. use it to predict the percentage of people in the world who were cell phone subscribers in 2005. (d) comment on the reliability of this prediction.
Business
1 answer:
Minchanka [31]3 years ago
5 0

Answer:

Explanation:

A)

The regression equation is,

ln(Cell Phone Subscribers) = -820.894 + 0.411704 Year

or,

Percent of Cell Phone Subscribers = exp(--820.894 + 0.411704 Year)

For the year 2005,

Percent of Cell Phone Subscribers = exp(--820.894 + 0.411704 * 2005)

= 96.79%

B)

P-value for the significance of the slope is very low (0.000). Thus, the model is statistically significant and the prediction of the model is highly reliable.

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D

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The work breakdown structure provides a basis for creating the project schedule and performing earned value management for measuring and forecasting project performance. A work breakdown structure is also known as WBS- which helps break down the team's work into smaller, more manageable sections. By breaking down the sections into smaller groups gives more opportunity for completion before moving on to the next group and makes the tasks more managable.

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Listed here are product costs for the production of soccer balls. Identify each cost (a) as either fixed or variable and (b) as
geniusboy [140]

Answer:

Product Cost Variable Or fixed Direct or indirect

1. Rubber core for soccer ball Variable Direct

2. Thread to hold leather together Variable Indirect

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3 years ago
The Operations Manager for Shadyside Savings & Loan orders cash from her home office for her very popular "BIG BUCKS" automa
notsponge [240]

Answer:

3,000 $100 bills equivalent to $300,000

Explanation:

The economic order quantity (EOQ) is the optimum quantity of a good to be purchased or required at a time in order to minimize ordering and carrying costs in inventory.

EOQ = the square root of [(2 times the annual demand in units times the incremental cost to process an order) divided by (the incremental annual cost to carry one unit in inventory)]

  • annual demand in units = 12,500 x 12 = 150,000
  • incremental costs to process an order = $300
  • incremental annual cost to carry one unit in inventory = 10% x 100 = $10

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8 0
3 years ago
EuroRail and Swiss Rail are hypothetical railways that have a duopoly on the route that connects the cities of Zurich and Munich
Wittaler [7]

Answer:

Select the answer that best describes the strategies in this game.

  • Both companies dominant strategy is to add the train.

Does a Nash equilibrium exist in this game?

  • A Nash equilibrium exists where both companies add a train. (Since I'm not sure how your matrix is set up I do not know the specific location).

Explanation:

we can prepare a matrix to determine the best strategy:

                                                  Swiss Rails

                                     add train             do not add train

                                    $1,500 /             $2,000 /

           add train                     $4,000                $7,500

EuroRail

      do not add train    $4,000 /             $3,000 /

                                               $2,000                $3,000

Swiss Rails' dominant strategy is to add the train = $1,500 + $4,000 = $5,500. The additional revenue generated by not adding = $5,000.

EuroRail's dominant strategy is to add the train = $4,000 + $7,500 = $11,500. The additional revenue generated by not adding = $5,000.

A Nash equilibrium exists because both companies' dominant strategy is to add a train.

7 0
3 years ago
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