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2 years ago

What is the estimated difference of 2.97 and 1-

Mathematics

1 answer:

Sidana [21]2 years ago

8 0

Answer:

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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

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

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

Strawberry candy cost 3¢ more than lollipops.

Bas_tet [7]

The answer is 54 divided by 4

5 0

2 years ago

Hello, could someone help me with this one?

ipn [44]

Answer:

The answer is A

Step-by-step explanation:

3 0

3 years ago

Select the correct answer.

alex41 [277]

Answer:

Option B

Step-by-step explanation:

Average rate of change of a function 'f' in the interval x = a and x = b is given by,

Average rate of change of change = $\frac{f(b)-f(a)}{b-a}$

Given function is,

g(x) = $\frac{5}{x-1}+2$

We have to calculate the rate of change in the interval [-4, 3],

Average rate of change = $\frac{g(3)-g(-4)}{3-(-4)}$

g(3) = $\frac{5}{3-1}+1$

= 2.5 + 1

= 3.5

g(-4) = $\frac{5}{-4-1}+1$

= -1 + 1

= 0

Average rate of change = $\frac{3.5-0}{3+4}$

= $\frac{3.5}{7}$

= $\frac{1}{2}$

Therefore, Option B will be the answer.

4 0

3 years ago

Given the proportion 8/5 = 2/m-3 what is the value of m

m_a_m_a [10]

Hey there! :)

Answer:

m = 4.25, or 17/4.

Step-by-step explanation:

Given the proportion:

$\frac{8}{5}= \frac{2}{m-3}$

Cross multiply:

8(m - 3) = 5 · 2

Distribute the 8:

8m - 8(3) = 10

8m - 24 = 10

Add 24 to both sides:

8m = 34

Divide both sides by 8:

8m/8 = 34/8

m = 4.25, or 17/4.

8 0

3 years ago