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Sloan [31]
3 years ago
14

A member of the park service believes the average number of cacti per square km in tucson, az in the year 2001 is less than the

average number of cacti per square km in tucson, az in the year 1970. for this study, he will make use of data from a 1970 study in which a random sample of 15 plots of land (each 1 square km) was taken around tucson, az. the park service researcher goes back to those exact same plots, and re-measures the number of cacti per square foot for each plot. below are the results from the analysis of this data.
Business
1 answer:
tia_tia [17]3 years ago
5 0

Question Continuation

a. What is a subject in this study?

b. What is the explanatory variable and what type of variable is it?

c. Which type of test is most appropriate?

Answer:

See Explanation Below

Explanation:

a.

In research, a subject can be referred to as a person, place, thing, or phenomenon that is being measured of observed. In the question above, the observation is focused on the area of cacti/km² plot of land near Tucson, AZ; hence, it'll be taken as the research subject.

b. Explanatory variables are those variables that are not totally independent and are used to predict or explain differences in the response variable.

Having pointed what an explanatory variable is, we'll list the explanatory variable(s) in the question, using the definition above.

1. Year;

The question compares the growth of cacti per km² in 1970 and 2001. The differences in the growth are then measured in order to determine if there's indeed a growth or a decline in growth of cacti.

Hence, year is an explanatory variable and it's numerical

2. Using the same yardstick, another explanatory variable in the question above is the average number of cacti per km².

It is considered an explanatory variable because it represent the numerical value of cacti present in a km² area.

It is also numerical

c.

The most appropriate type of test in this kind of observation is the independent sample t test.

An Independent Samples t Test takes into consideration the means or averages of two independent groups and then make makes comparison between them in order to determine whether there is statistical evidence that the associated population means are significantly different.

The question compares the average of cactus in 1970 and 2001.

The keyword here is average and that is what is being described by the independent sample t test. I.e. the average of cactus per km² in both years.

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In network economics, the value of a commercial software vendor's software products:
Natali [406]

Answer:

increases as more people use them.

Explanation:

Network economics refers to a business that uses network effect. It is also called Netromix. The value of a good is increased as the number of buyers increases.

The business will benefit from feedback received by customers that use their products.

For example online services like LinkedIn and Twitter benefit from this type of framework. The more users that use these software th more the business gains.

7 0
3 years ago
Consider the following two mutually exclusive projects:Year Cash Flow (X) Cash Flow (Y)0 ?$16,400 ?$16,400 1 6,660 7,190 2 7,240
pickupchik [31]

Answer:

1a. 7.12%

b. 6.99%

2. 9.69%

Explanation:

The IRR is the discount rate that equates the after tax cash flows from an investment to the amount invested.

The IRR can be calculated using a financial calculator.

The IRR for project X :

Cash flow in year 0 = $-16,400

Cash flow in year 1 = $6,660

Cash flow in year 2 = $7240

Cash flow in year 3= $4760

IRR = 7.12%

The IRR for project Y :

Cash flow in year 0 = $-16,400

Cash flow in year 1 = $7,190

Cash flow in year 2 = $7,780

Cash flow in year 3 = $3530

IRR = 6.99%

The cross over rate is the rate that equates the cash flow from both projects.

The first step is to subtract the cash flow from project Y from the cash flow of project X

Cash flow for year 0 = $16400 - $16400 = 0

Cash flow for year 1 = $6,660 - $7,190 = $-530

Cash flow for year 2 =$7,240 -$7,780 =$-540

Cash flow for year 3 = $4,760 - $3,530 = $1230

The next step is to find the discount rate using a financial calculator.

Cash flow for year zero = 0

Cash flow for year one = $-530

Cash flow for year 2 =$-540

Cash flow for year 3 =$1230

Cross over rate = 9.69%

I hope my answer helps you

6 0
4 years ago
You are planning to save for retirement over the next 30 years. To do this, you will invest $750 per month in a stock account an
Nikolay [14]

Answer:

Ans. Assuming that the withdrawal period is 300 months (25 years), you can withdraw every month $15,547.96

Explanation:

Hi, first, we have to take to future value (30 years in the future) the invested capital (both the stock account and the bond account). From there, we will consider the sum of both future values as the present value of the annuity that you are about to receive for the next 25 years (300 months). But before we do all that, we need to convert the return rates (compounded monthly) into effective monthly rates, for that we just go ahead and divide each one by 12, as follows

r(Stock) = 0.105/12= 0.00875

r(Bond)= 0.061/12 = 0.00508

r(Combined Account)= 0.069/12=0.00575

Now we are ready, first, let´s find the future value of the stock account.

FV(stock)=\frac{750((1+0.00875)^{360}-1) }{0.00875} =1,887,300.74}

Now, let´s find out how much will it be in 30 years, investing $325 per month, at the end of the month, at 0.508% effective monthly.

FV(Bond)=\frac{325((1+0.00508)^{360}-1) }{0.00508} =332,526.95

And then we add them up and we get:

FV(stock)+FV(bond)=1,887,300.74+332,526.95=2,219,827.69

Ok, now let´s find the annuity (monthly withdraw) taking into account that we are going to make 300 withdraws at a rate of 0.575% effective monthly,

[tex]2,219,827.69=A(142.7729593)

\frac{2,219,827.69}{142.7729593} =A

A=15,547.96\frac{A((1+0.00575)^{300}-1) }{0.00575(1+0.00575)^{300} }[/tex]

Best of luck.

5 0
3 years ago
A fixed asset with a cost of $31,588 and accumulated depreciation of $28,429.20 is sold for $5369.96. What is the amount of gain
Artist 52 [7]

Answer:

$2,238.16

Explanation:

In the disposal of assets, gain or loss will be a comparison between the book value and the selling price.

Book value is the asset costs minus accumulated depreciation.

in this case, the book value will be

= Asset cost - Depreciation

= $31,588- $28,429.20

=$3,158.8 is the book value.

Gain or loss = selling price- book value

=$5,369.96 - $3,158.8

=$2,238.16

A gain of$2,238.16 will be gain from that sale.

4 0
3 years ago
Most CLEP exams correspond to blank college courses
Kamila [148]
True Because they have preperations for your tests
8 0
3 years ago
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