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Montano1993 [528]
2 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]2 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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Answer: Users.

Explanation:

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The Users are the finally people who actually use the product and their opinion matters. They are usually consulted on how to make a product better in the post-evaluation process.

Kate as a sales representative arranged to meet students and got their feedback on textbooks with the aim of using their feedback to make their textbooks better. This would signify that the students play a USER role in the buying centre and their opinion is being used to learn to make a product better. Also, the company sells textbooks and textbooks are usually for students.

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A bank has $8,000 in deposits and $6,000 in loans. it has loaned out all it can given the reserve requirement. it follows that t
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Most businesses replace their computers every two to three years. Assume that a computer costs $2,000 and that it fully deprecia
sineoko [7]

Answer:

$2000=Z/(1+i)^1+Z/(1+i)^2+Z/(1+i)^3

Explanation:

let Z be the annual minimum cash flow

The internal rate of approach can be used here, in other words, the rate of return at which capital outlay of $2000 is equal present values of future cash flows

In year 1, present value of cash =X/discount factor

year 1 PV=Z/(1+i)^1

year 2 PV=Z/(1+i)^2

year 3=Z/(1+i)^3

Hence,

$2000=Z/(1+i)^1+Z/(1+i)^2+Z/(1+i)^3

Solving for Z above would give the minimum annual cash flow that must be generated for the computer to worth the purchase

Assuming i, interest rate on financing is 12%=0.12

Z can be computed thus:

$2000=Z(1/(1+0.12)^1+(1/(1+0.12)^2+(1+0.12)^3)

$2000=Z*3.09497902

Z=$2000/3.09497902

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Answer:

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The Fair Credit Reporting Act (FCRA) gives consumers the right to dispute the information reported to a credit scoring company. It also regulates how these companies are allowed to collect and share the acquired data.

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