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HACTEHA [7]
3 years ago
13

Bro I need help plzzz

Mathematics
1 answer:
Allushta [10]3 years ago
6 0
48.4 hope you get it correct!
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A statistician selected a sample of 16 accounts receivable and determined the mean of the sample to be $5,000 with a standard de
Anon25 [30]

Answer:

The confidence level that was used is 0.25% .

Step-by-step explanation:

We are given that mean of the selected sample of 16 accounts is $5,000 and a standard deviation of $400.

It has also been reported that the sample information indicated the mean of the population ranges from $4,739.80 to $5,260.20. This represents the Confidence Interval for population mean.

<em>But we have to find that at what confidence level this information about range of population men has been stated.</em>

Since we know that Confidence Interval for population mean is given by :

   <em>C.I. for population mean = Sample mean(xbar) </em>\pm<em> z value * </em>\frac{Standard    deviation}{\sqrt{n} }<em />

i.e.,<em>if we have 95% C.I. = xbar </em>\pm<em> 1.96 * </em>\frac{\sigma}{\sqrt{n} }<em> .</em>

So, our Confidence Interval for population is written as :

 [$4,739.80 , $5,260.20] = $5000 \pm z value * \frac{400}{\sqrt{16} }

 $5000 - z value * 100 = $4739.80    { Solving these we get Z value = 2.602}

 $5000 + z value * 100 = $5260.20

In z table we find that at value of 2.60 the probability is 0.99534 so subtracting this from 1 we get confidence level for one tail i.e.0.5%(approx).

Therefore, for two tail Confidence level will be 0.5%/2 = 0.25% .

4 0
3 years ago
Find x. Round your answer to the nearest tenth of a degree and show work.
Troyanec [42]

Answer:

35.0

Step-by-step explanation:

14+21 equals 35 and then round to the nearest tenth of a degree and came up with 35.0.

7 0
3 years ago
What is the measure of CBF?
Andrei [34K]
144° i’m pretty sure
7 0
3 years ago
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You use your mobile phone to phone home every day. It cost £15 per moth and £0.18 per minute for phone calls. how much will you
suter [353]
0.18x420= 75.6+15.00=90.6
7 0
3 years ago
– 5 | 3 z + 8| –5 = -20​
olchik [2.2K]

I'm assuming you want to solve for  z  :)

By simplifying both sides of the equation, then isolating the variable.

Exact form:

z= -5/3 , - 11/3

Mixed number form:

z=  −1  2/3  ,  −3  2/3

8 0
3 years ago
Read 2 more answers
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