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2 years ago

What is the standard error of the sampling distribution of sample proportion?.

Mathematics

1 answer:

storchak [24]2 years ago

5 0

Answer:

√ (p(1-p) / n)

Step-by-step explanation:

Standard Error(SE) of the Sample Proportion: √ (p(1-p) / n). Note: as the sample size increases, the standard error decreases.

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Jim and Dianna want to save for their child’s college expenses. They find an annuity that pays 6% annual interest, compounded mo

lana66690 [7]

Answer:

future value = $49163.8

so required amount will be $491200 nearest $100

Step-by-step explanation:

given data

annual interest rate = 6 %

annuity = $300 per month

time period = 10 years

to find out

how much money will they have for the college expenses

solution

we know that effective rate will be

effective rate = $\frac{0.06}{12}$

effective rate = 5 × $10^{-3}$

number of payment = 12 × 10 = 120

so future value will be express as

future value = annuity × $\frac{(1+r)^t-1}{r}$ .........1

future value = 300 × $\frac{(1+5*10^{-3})^{120}-1}{5*10^{-3}}$

future value = 300 × 163.8793

future value = $49163.8

so required amount will be $491200 nearest $100

7 0

3 years ago

Compound Interest: Hannah is putting 10,000 dollars in the bank for 5 years at 6% p.a every 6 months what is her Final Balance?

8090 [49]

I think you can solve it by doing this:

10(10,000+0.06)= Final Balance

6 months + 6 months = 1 year

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
She has to pay twice a year

Now that we know that just multiply 2 by 5 and you get 10. 10(10,000+0.06)= Final Balance

So it should be 100000.6

Not sure if that's right so ask someone to check

6 0

3 years ago

What is the surface of the prism?

jasenka [17]

Given :-

Length :- 8m
Width :- 10
Height :- 10m

To find :-

Surface area

Solution :-

formula for Surface Area = 2(LW + WH + HL)

putting the known values,

Surface Area = 2(8×10 + 10×10 + 10×8) m²

Surface Area = 2(260) m²

Surface Area = 520m² ( Option C)

4 0

2 years ago

Help please, kind of confused

Anvisha [2.4K]

Answer:

Step-by-step explanation:

Yikes. This is quite a doozy, so pay attention. We will begin by factoring by grouping. Group the first 2 terms together into a set of parenthesis, and likewise with the last 2 terms:

$(2d^4+6d^3)-(18d^2-54d)$ and factor out what's common in each set of parenthesis:

$2d^3(d+3)-18d(d+3)$ . Now you can what's common is the (d + 3), so factor that out now:

$(d+3)(2d^3-18d)$ BUT in that second set of parenthesis, we can still find things common in both terms, so we continue to factor that set of parenthesis, carrying with us the (d + 3):

$(d+3)2d(d^2-9)$ BUT that second set of parenthesis is the difference of perfect squares, so we continue factoring, carrying with us all the other stuff we have already factored:

$(d+3)2d(d+3)(d-3)$ . That's completely factored, but it's not completely simplified. Notice we have 2 terms that are identical: (d + 3):

$2d(d+3)^2(d-3)$ is the completely factored and simplified answer, choice 3)

3 0

3 years ago

Trying to understand this question

Mekhanik [1.2K]

285%
is the answer i think

6 0

3 years ago

Read 2 more answers