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4 years ago

Plz help!! im working on systems of linear equations...

Mathematics

1 answer:

ipn [44]4 years ago

7 0

Answer:

Write the problem as comment I dont understand what it means. So I mean just copy it Ill wait for you.

Step-by-step explanation:

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Compute the standard error for sample proportions from a population with proportion p= 0.55 for sample sizes of n=30, n=100 and

Pani-rosa [81]

Given Information:

Population proportion = p = 0.55

Sample size 1 = n₁ = 30

Sample size 2 = n₂ = 100

Sample size 3 = n₃ = 1000

Required Information:

Standard error = σ = ?

Answer:

$\sigma_1 = 0.091$

$\sigma_2 = 0.050$

$\sigma_3 = 0.016$

Step-by-step explanation:

The standard error for sample proportions from a population is given by

$\sigma = \sqrt{\frac{p(1-p)}{n} }$

Where p is the population proportion and n is the sample size.

For sample size n₁ = 30

$\sigma_1 = \sqrt{\frac{p(1-p)}{n_1} }$

$\sigma_1 = \sqrt{\frac{0.55(1-0.55)}{30} }$

$\sigma_1 = 0.091$

For sample size n₂ = 100

$\sigma_2 = \sqrt{\frac{p(1-p)}{n_2} }$

$\sigma_2 = \sqrt{\frac{0.55(1-0.55)}{100} }$

$\sigma_2 = 0.050$

For sample size n₃ = 1000

$\sigma_3 = \sqrt{\frac{p(1-p)}{n_3} }$

$\sigma_3 = \sqrt{\frac{0.55(1-0.55)}{1000} }$

$\sigma_3 = 0.016$

As you can notice, the standard error decreases as the sample size increases.

Therefore, the greater the sample size lesser will be the standard error.

8 0

4 years ago

If an arena hosts a concert for the same artist two years in a row and earns $1,500,000 in revenue during year one and $975,000

user100 [1]

The percentage decrease is 35%.

Step-by-step explanation:

Given,

Revenue generated in first year = Old value = $1,500,000

Revenue generated in second year = New value = $975,000

Change = New value - Old value

Change = 975000 - 1500000= -$525000

The negative sign indicates the decrease.

Percent decrease = $\frac{Change}{Old\ value}*100$

Percent decrease = $\frac{525000}{1500000}*100\\$

$Percent\ decrease=\frac{52500000}{1500000}\\\\Percent\ decrease = 35\%$

The percentage decrease is 35%.

Keywords: percentage, subtraction

Learn more about percentages at:

#LearnwithBrainly

4 0

3 years ago

you are randomly assigned a password consisting of 6 different characters chosen from the digits 0 to 9 and the letters A to Z.

Vedmedyk [2.9K]

It would be 50%. because half numbers and half letters

8 0

4 years ago

. Simplify the following expression by combining like terms:<br> 3a + 6ab + 9ab + 3(a + ab)

gladu [14]

Answer:

6a+18ab

I think is correct

3 0

3 years ago

Read 2 more answers

What is the standard form?

jolli1 [7]

Answer:

Standard form is a way of writing down very large or very small numbers easily. 103 = 1000, so 4 × 103 = 4000 . ... This idea can be used to write even larger numbers down easily in standard form. Small numbers can also be written in standard form.

Step-by-step explanation:

8 0

3 years ago