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umka2103 [35]
3 years ago
15

In a study of annual salaries of employees, random samples were selected from two companies to test if there is a difference in

average salaries. For Company "X", the sample was size 65, the sample mean was $47,000 and the population standard deviation is assumed to be $11,000. For Company "Y", the sample size was 55, the sample mean was $44,000 and the population standard deviation is assumed to be $10,000. Test for a difference in average salaries at a 5% level of significance. What is your conclusion?
Mathematics
1 answer:
vichka [17]3 years ago
7 0

Answer:

Step-by-step explanation:

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5
pychu [463]

Answer:

B 8.56

this is the answer because you simply add what he bought so 1.13+1.13+1.76 which is 4.02 then subtract what he started with which was 12.58 so 12.58-4.02 is 8.56 so that's your answer

8 0
2 years ago
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(a) One ball is selected at random from the bag.
lana [24]

Answer:

a) The probability is 1/5

bi) The probability each ball is even will be 2/5

bii) The probability the sum of the numbers on the ball is not more than 10 is 16/25

(that's what I think it is)

3 0
3 years ago
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Lapatulllka [165]
The correct simplification of the expression is 9c^2 i think.
5 0
3 years ago
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A professional baseball diamond is a square. The distance from base to base is 90 ft. To the nearest foot, how far does a catche
mamaluj [8]

BSE is square.

Let side be s

  • s=90ft

Diagonal be d

\\ \tt\longmapsto s=\dfrac{d}{\sqrt{2}}

\\ \tt\longmapsto d=s\sqrt{2}

\\ \tt\longmapsto d=90\sqrt{2}

\\ \tt\longmapsto d=127ft

3 0
2 years ago
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Express £5 as a fraction of £4.
viktelen [127]

Answer:

£5/£4

Step-by-step explanation:

£5 over £4 can be expressed as a fraction.

⇒ £5/£4

7 0
3 years ago
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