2 years ago

Can anyone help me out with questions 14 and 15? (i need explanations as well plz)

Mathematics

1 answer:

Bad White [126]2 years ago

5 0

The answer is in above figures.

I hope you get the point.

You might be interested in

The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher

ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

$\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340$

Thus, the correct answer is

Option D) 340

7 0

3 years ago

According to the diagram, which are congruent? Check all

adell [148]

I believe it’s AB AND DF, ZBAC = ZDEF

4 0

3 years ago

Matt's phone bill consist of an initial monthly charge of $30 and then he pays $4.50 per gigabyte of internet he uses. If he spe

ivanzaharov [21]

Answer:

5 gigabytes

Step-by-step explanation:

30+4.50x=52.50 (equation)

-30 -30

4.50x=52.50

/4.50 /4.50

x= 5

5 gigabytes

5 0

3 years ago

A bank receives a deposit for $30,000. If the bank has a 10 percent reserve requirement, approximately how much money could this

guajiro [1.7K]

Answer:300,000

Step-by-step explanation:

Ap3x

5 0

3 years ago

How do i plot this??

Softa [21]

Answer:

its pretty simple actually put a point after the -1 (-0.9) and move left twice from -1 to get the plot point -1.2

5 0

3 years ago