Answer:
lower limit : 36.44
upper limit : 39.56
Step-by-step explanation:
Given :
s = 9
n = 90
x = 38.9
Alpha, α = 0.10
∴
The confidence interval is :
Therefore,
lower limit : 36.44
upper limit : 39.56
Solve for b:4 = -2/3(5) + b
1 answer:
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You want to isolate C, so the first step would to have it be positive. You would do this by adding C to both sides of the equation to cancel the C on one of the sides out like this:
. Then you want to cancel out the P, so you subtract it on both sides like this:
And that is your answer
. Then you want to cancel out the P, so you subtract it on both sides like this:
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Given- 90% of runner completed the marathon.
out of which 30% are man.
To proof - let the total number of runner be y.
the men completed the marathon be 30% of the 90%.
thus we have
30% of 90% of y = 270
×
×y = 270
now solving the above equation
we get
Thus solving the equation
y = 1000
Thus the total runners of men who completed marathon be 1000.
Hence proved
<h2>Answer with explanation:</h2>
As per given , we have
n= 64
a) Since , the sample mean is the point estimate for the population mean.
Therefore, the point estimate of the population mean =
b) Critical z-value for 99% confidence :
Confidence interval :
Hence, the 99 percent confidence interval for the population mean is between 7.46 and 8.88.