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IgorC [24]
3 years ago
15

He takes a random sample of 49 recent charterholders and computes a mean salary of $172,000 with a standard deviation of $35,000

. Use this sample information to determine the 90% confidence interval for the average salary of a CFA charterholder.
Mathematics
1 answer:
uysha [10]3 years ago
4 0

Answer:

the 90% of confidence intervals for the average salary of a CFA charter holder

 (1,63,775 , 1,80,000)

Step-by-step explanation:

<u>Explanation</u>:-

random sample of n = 49 recent charter holders

mean of sample (x⁻) =  $172,000

standard deviation of sample( S) = $35,000

Level of significance α= 1.645

<u> 90% confidence interval</u>

(x^{-} - Z_{\alpha } \frac{s}{\sqrt{n} } , x^{-} + Z_{\alpha } \frac{s}{\sqrt{n} })

(172000 - 1.645 \frac{35000}{\sqrt{49} } , 172000 +1.645 \frac{35000}{\sqrt{49} })

on calculation , we get

(1,63,775 , 1,80,000)

The mean value lies between the 90% of confidence intervals

(1,63,775 , 1,80,000)

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1 year ago
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antiseptic1488 [7]

Answer:

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Step-by-step explanation:

If i understood it correctly .

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at first stop - 4 people get off . So 9 people should be on bus.

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after 2nd stop - there are 12 people on bus.

at 2nd stop  6 people got off.. so there were total of 18 on the bus

So if there were 9 people on bus stop by stop 1 .. so 9 people should have got in bus at stop 1 to make it equal to 18.

Only doubt i have is  : if the question is asking how many got on the 2nd stop.  also i was not clear what does this line means - At the first stop, four people get off and to get on.

6 0
3 years ago
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The sum of 139 and the product of a number raised to the third power and 17. In symbols, the phrase is written as.
qwelly [4]

Answer:

<u>y = 139 + x³ + 17 </u>

Step-by-step explanation:

The word "sum" means the amount resulting from addition in an equation. This means that we are adding all of these numbers together.

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So, you would be adding 139, the product of x³, and 17, which would be written as y = 139 + x³ + 17.

7 0
2 years ago
→
Rudiy27
It is 9 degrees because at 6am the temperature was -12 degrees and at 10am the temperature was -3 degrees.
7 0
3 years ago
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Triss [41]
9-5=4 Therefore f=4
Hope this helps
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2 years ago
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