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Akimi4 [234]
1 year ago
12

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between and

. Assume that a confidence interval estimate of the population mean annual starting salary is desired. a. What is the planning value for the population standard deviation? b. How large a sample should be taken if the desired margin of error is ? Round your answers to next whole number. ? ? c. Would you recommend trying to obtain the margin of error? Explain.
Mathematics
1 answer:
N76 [4]1 year ago
7 0

Because of the very huge sample size, we do not advise attempting to acquire the $100 margin of error.

The annual starting salaries for college graduates with degrees are between $30,000 and $45,000.

The confidence interval is 95%.

The planning value of the population standard deviation is expressed as:

= ( 45000 - 30000 ) / 4

= 15000/4

= 3750

And, 95% confidence interval a is 0.05.

Using the standard normal table,

Z(0.025) = 1.96

(a) For error E = $500,

n = ( Z × S/E )²

n = ( 1.96 × 3750/500)²

n = 216.09 = 217

(b) For error E = $200,

n = ( Z × S/E )²

n = ( 1.96 × 3750/200)²

n = 1351

(c) For error E = $100

n = ( Z × S/E )²

n = ( 1.96 × 3750/100)²

n = 5403

Therefore, Due to the sample size being too huge, we do not advise attempting to achieve the $100 margin of error.

Learn more about margin of error here:

brainly.com/question/28441074

#SPJ1

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Pls answer this for me​
nekit [7.7K]

Answer:

a 166 67/100

b 20 1/4

c 829 77/100

d 664 47/50

e 208 4/25

Step-by-step explanation:

you need to find the common denominator (the number on the bottom) so for the first one when can 10 = 100 if you multiply 10 x 10 you get 100 so multiply the entire fraction by 10 and you will get 10/100 so the equation would be 381 10/100 - 214 43/100 which equals 166 67/100 then just do the same thing for the rest of them

8 0
3 years ago
Please help it would be much appreciated!
sergiy2304 [10]

Answer:

Part a) Option d

Part b) Option a

Step-by-step explanation:

Part a

if we look at the options given and the data available

Option a) x^4+9

Putting x= 2 we get (2^4) + 9 =25

Putting x= 3 we get (3^4) + 9 =90 but f(x) =125 so not correct option

Option b) (4^x)+9

Putting x= 2 we get (4^2) + 9 =25

Putting x= 3 we get (4^3) + 9 =73 but f(x) =125 so not correct option

Option c) x^5

Putting x= 2 we get (2^5)  =32 but f(x) =25 so not correct option

Option d) 5^x

Putting x= 2 we get (5^2)  =25

Putting x= 3 we get (5^3)  =125

Putting x= 4 we get (5^4)  =625

So Option d is correct.

Part (b)

3(2)^3x

can be solved as:

=3(2^3)^x

=3(8)^x

So, correct option is a

8 0
3 years ago
Mr. Jones eats out at his favorite buffet restaurant every Friday night. If the cost is $9 and he budgets $42 for the month, how
alexandr402 [8]

Answer:

He will be able to eat nine times.

Step-by-step explanation:

Because nine times nine is 91 which is on one less then what he has, so that means he will be able to eat there nine times. Hope I helped

7 0
2 years ago
What is the area of this triangle?
icang [17]

Answer: 18

Step-by-step explanation: The formula for calculating a triangle’s area is 1/2(base•height). This means that 12•3 is 36, which multiplied by 1/2 is 18.

(Hope this helps)

5 0
3 years ago
Read 2 more answers
4 + 3(4 - 9^0)+ 5^-3i
frutty [35]

Answer:

13.008 or 13 1/125 or 1626/125

Step-by-step explanation:

4 0
3 years ago
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