Helpp quick last question!!

Legalize Marijuana, Part II. As discussed in Exercise 6.12, the 2010 General Social Survey reported a sample where about 48% of

kvv77 [185]

Answer:

Around 2397 Americans must be surveyed to get a margin of error of 2%.

Step-by-step explanation:

We are given the following in the question:

Proportion of US residents who thinks marijuana should be made legal = 48%

$\hat{p} = 0.48$

We have to construct a 95% confidence interval.

Margin of error = 2% = 0.02

Formula for margin of error =

$z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting values, we get,

$0.02 = 1.96\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\0.02 = 1.96\times \sqrt{\dfrac{0.48(1-0.48)}{n}}\\\\\sqrt{n} = 1.96\times \dfrac{\sqrt{0.48(1-0.48)}}{0.02}\\\\\sqrt{n}=48.96\\n = 2397.0816\approx 2397$

Thus, around 2397 Americans must be surveyed to get a margin of error of 2%.

8 0

3 years ago

PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEE HELP

algol [13]

It might be A but I'm not 100% sure inequalities was my worst thing I learned in algebra 2<span />

6 0

3 years ago

dave has 10 more marbles than Emma. Emma has m number of marbles. Write a variable expression for the number of marbles that Dav

a_sh-v [17]

Emma's marble = m
So, Dave has = m + 10

So, your final answer is m + 10

Hope this helps!

8 0

3 years ago

Read 2 more answers

11. Monthly sales revenue, S (in $), and monthly advertising expenditure, A (in $), are modelled by the linear relation, S = 900

Elenna [48]

We are to answer the questions given the sales and advertisement function

The answers are given below

Given:

S = 9000 + 12A

Where,

S = Monthly sales revenue

A = monthly advertising expenditure

a. If the firm does not spend on advertisement

S = 9000 + 12A

Where,

A = 0

S = 9000 + 12A

S = 9000 + 12(0)

S = $9000

b. If the firm spends $800 on advertising one month

S = 9000 + 12A

= 9000 + 12(800)

= 9000 + 9600

= 18,600

S = $18,600

c. S = 9000 + 12A

When

S = $15,000

15,000 = 9000 + 12A

15000 - 9000 = 12A

6000 = 12A

A = 6000/12

= 500

A = $500

d. If the firm increases monthly expenditure on advertising by $1

If A increases to $501

S = 9000 + 12A

= 9000 + 12(501)

= 9000 + 6,012

= 15,012

S increases to $15,012

Helpp quick last question!! ​

Helpp quick last question!!