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erastovalidia [21]
3 years ago
10

Hiii please help! i’ll give brainliest if you give a correct answer tysm

Mathematics
1 answer:
vitfil [10]3 years ago
7 0

Answer:2 1/2 divided by 5/8 = ?

Step-by-step explanation:

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A population is known to be normally distributed with a standard deviation of 2.8. (a) Compute the 95% confidence interval on th
Ugo [173]

Answer:

Step-by-step explanation:

Mean = sum of terms/number of terms

The mean of the given sample is

(8 + 9 + 10 + 13 + 14 + 16 + 17 + 20 + 21)/9 = 14.2

a)

For a confidence level of 95%, the corresponding z value is 1.96.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

Where

n represents the number of samples

It becomes

14.2 ± 1.96 × 2.8/√9

= 14.2 ± 1.96 × 0.933

= 14.2 ± 1.83

The lower end of the confidence interval is 12.37

The upper end of the confidence interval is 16.03

b)

For a confidence level of 99%, the corresponding z value is 2.58

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

Where

n represents the number of samples

It becomes

14.2 ± 2.58 × 2.8/√9

= 14.2 ± 2.58 × 0.933

= 14.2 ± 2.4

The lower end of the confidence interval is 11.8

The upper end of the confidence interval is 16.6

3 0
2 years ago
Find the profit % if selling price is Rs 130 and profit is Rs5​
Ad libitum [116K]

Answer:

3.85 % to 2 decimal places

Step-by-step explanation:

If you have Rs5 profit it means that you have sold it for 135

Do 5 / 130

Then times the answer by 100 *100

7 0
3 years ago
Read 2 more answers
What affect does "h" have on the parent function y = 1/x ?
pochemuha
If h moves the graph left or right, y= \frac{1}{x+h} (moves left)
y= \frac{1}{x-h} (moves right)

If a vertical stretch by a factor of |h|, then y =  \frac{h}{x}

If h moves the graph up or down, y= \frac{1}{x} +h (moves up)
y= \frac{1}{x} -h (moves down)

y= \frac{1}{-hx} and h = 1
7 0
3 years ago
Help please will give brainliest if correct
insens350 [35]
The answer is $160. You have to subtract 200 from 20%
8 0
3 years ago
Read 2 more answers
Simplify the expression:<br><br><br><br> 4b - 24 + 19<br><br> 4p - 5p - 30p<br><br> 4.2v - 5 - 6.5v
Licemer1 [7]
For the first expression we will only simplify the constants:

4b - 24 + 19 ——> 4b - 5

The second expression only has variables so we simplify the whole expression

4p - 5p - 30p = -31p


The third expression we will only simplify the variables

4.2v - 5 - 6.5v ——> -2.3v - 5
4 0
2 years ago
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