Which answer does not correctly describe the graph of y = 5x + 12?

For each level of precision, find the required sample size to estimate the mean starting salary for a new CPA with 95 percent co

Rzqust [24]

Answer:

(a) Margin of error ( E) = $2,000 , n = 54

(b) Margin of error ( E) = $1,000 , n = 216

(c) Margin of error ( E) = $500 , n= 864

Step-by-step explanation:

Given -

Standard deviation $\sigma$ = $7,500

$\alpha$ = 1 - confidence interval = 1 - .95 = .05

$Z_{\frac{\alpha}{2}}$ = $Z_{\frac{.05}{2}}$ = 1.96

let sample size is n

(a) Margin of error ( E) = $2,000

Margin of error ( E) = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

E = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$E^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{2000^{2}} \times 7500^{2}$

n = 54.0225

n = 54 ( approximately)

(b) Margin of error ( E) = $1,000

E = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

1000 = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$1000^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{1000^{2}} \times 7500^{2}$

n = 216

(c) Margin of error ( E) = $500

E = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

500 = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$500^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{500^{2}} \times 7500^{2}$

n = 864

7 0

4 years ago

Got stuck can someone help me

fiasKO [112]

50 dollars per month. It says "after x months" -50x is the variable thats changes.

4 0

3 years ago

After your instructor added 4 points to each student's test score, your score is 92.

Alexandra [31]

88

92-4=88

hope this helps

7 0

3 years ago

George and Carmen went on a bicycle trip. They took a bus to their starting point and then biked the rest. They traveled 350 kil

wlad13 [49]

Total distance covered by George and Carmen
x + y = 350
And they biked 80 kilometers more than they bussed
80 + y = x 
Putting the value of x=80 + y in x + y = 350:
We get:
80 + y + y = 350 
2y = 270 
y = 135 km

Substituting y = 135 in x + y = 350 
x + 135 = 350
x = 215 km 

Thus George and Carmen biked for 215 km and bussed for 135 km.

4 0

3 years ago

(2)/(7):0.6x=(4)/(21):0.25

inysia [295]

Answer:

= 1.6

Unless you meant to clarify what in the equation you needed, but that is the answer to it.

7 0

3 years ago