1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aalyn [17]
3 years ago
15

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. Ho

w many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the​ Internet? Assume that we want to be 90​% confident that the sample percentage is within five percentage points of the true population percentage for all sales transactions.
Mathematics
1 answer:
sleet_krkn [62]3 years ago
4 0

Answer:

We need at least 271 transactions

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

Minimum sample size within five percentage points.

n when M = 0.05.

We dont know the proportion, so we use \pi = 0.5, which would be the proportion requiring the largest sample size

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.05 = 1.645\sqrt{\frac{0.5*0.5}{n}}

\0.05\sqrt{n} = 1.645*0.5

\sqrt{n} = 16.45

(\sqrt{n})^{2} = (16.45)^{2}

n = 270.6

Rouding up

We need at least 271 transactions

You might be interested in
Paul is comparing two high-speed Internet service providers (ISPs) for his business. The graph represents the cost of each ISP a
Amiraneli [1.4K]

Answer:

12 months

Step-by-step explanation:

Theres an awful amount of needless information to get through.

Only the last paragrph is needed.

C(t) = 180 + 10t

C(t) = 25t

Set the equations equal

25t = 180 + 10t

Subtract 10t from both sides

15t = 180

Divide both sides by 15

t = 12

7 0
3 years ago
1. Choose the best answer that represents the property used to rewrite the expression.
Likurg_2 [28]

in log minus means divide

log 6 - log 3 = log (6÷3)

log 6 - log 3 = log 2

6 0
2 years ago
Will give brainlist!
Ainat [17]
A segment bisector is a geometric figure that divides the line segment exactly in half.

Vertical angles theorem states that vertical angles, angles that are opposite to each other and formed by two intersecting straight lines, are congruent.
4 0
3 years ago
An online furniture store sells chairs for $150 each and tables for $550 each. Every day, the store can ship at most 32 pieces o
Sindrei [870]

Answer: $3,300

Step-by-step explanation:

because each chair costs about $150, and 22 chairs were sold, then the problem is 150x22. And 150x22 is $3,300.

7 0
3 years ago
Read 2 more answers
21/√7-5√7/2 solve it
umka21 [38]

Answer:

√72

Decimal Form:

1.32287565…

Step-by-step explanation:

To subtract fractions, find the LCD and then combine.

5 0
2 years ago
Other questions:
  • DeShawn uses 3/4 of a box of rice to cook dinner. The portion he uses weighs 12 ounces. Write and solve and equation to find the
    5·2 answers
  • a culture started with 6,000 bateria after 6 hours,it grew to 7,200 .predict how many bacteria will be present after 17 hours ro
    15·2 answers
  • Boxes of fruit snacks are on sale at the grocery. The boxes are the same size. A family needs to purchase 24 boxes. There are 3
    14·2 answers
  • Which of the following describes all the solutions to the inequality 5x+7y=22 when y=-4
    11·1 answer
  • Simplify by dividing negative three over eight ÷ five over nine . (5 points)
    5·2 answers
  • Beth filled 64 jars with paint. If each jar holds 1 pint of paint, how gallons of paint did Beth use
    15·1 answer
  • Write an equation that represents the line
    9·1 answer
  • A circle has a radius 30 cm. What is the area? Show your<br> work.
    6·1 answer
  • Select the correct answer. Convert (2, pi) to rectangular form.
    5·2 answers
  • Julie deposited $500 into an account that earned 10% compound interest over 5 years. What is the account value earned after 5 ye
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!