Question
Asked Nov 13, 2019
3 views

Please explain how to do this problem on paper and TI 84

A political candidate has asked you to conduct a poll to determine what percentage of
people support him. If the candidate only wants a 10% margin of error at a 90%
confidence level, what size of sample is needed?
Hint: Video[+]
help_outline

Image Transcriptionclose

A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 10% margin of error at a 90% confidence level, what size of sample is needed? Hint: Video[+]

fullscreen
check_circle

Expert Answer

Step 1

It is given that the confidence level is 0.90.

Here,

help_outline

Image Transcriptionclose

a 1-0.90 = 0.10 0.10 2 2 0.05 F0.05 히2

fullscreen
Step 2

The critical value using TI-84 is obtained as follows:

  • Enter 2nd > DISTR.
  • Choose 3: InvNorm(
  • Enter area as 1– 0.05, µ as 0 and σ as 1.
  • Select Paste then click Enter.

Thus, the output obtained as 1.644853626.

Hence, the value of z0.05 is 1.645.

Here, the margin of error (E) is 0.10.

As there is no any estimates available, the ...

help_outline

Image Transcriptionclose

(2(1-p)) E 2 1.645 (0.5x (1-0.5)) 0.10

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Math

Statistics

Advanced Topics in Statistics

Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: please show TI 84 steps

A: The margin of error can be calculated for the proportion by using the formula: 

question_answer

Q: When conducting a test for the difference of means for two independent populations x1 and x2, what a...

A: The appropriate Null and Alternative Hypotheses are given below: From the given information, the cla...

question_answer

Q: Question 15 is what I am struggling with. Please help, thank you.

A: The hypotheses are given below:

question_answer

Q: Compute the confidence interval for the following problem. This time we will be using estimation of ...

A: The 90% confidence interval for the mean is given below: 

question_answer

Q: #26The quarterly sales data (number of copies sold) for a college textbook over the past three years...

A: a)Step-by-step procedure to draw the time series plot using the MINITAB software is as follows:Choos...

question_answer

Q: P(A)=0.57, P(B)=0.7, AND P(A+B)=0.42 Find P(A+B)   Please help

A: Note:Thank you for the question. However, in the question, it is given that P (A + B) = 0.42, and ag...

question_answer

Q: The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 22 people re...

A: Sample mean = 76 gallons.Sample standard deviation, s is 18 gallons.The sample size, n is 22.a).Sinc...

question_answer

Q: In a clinical trial of a drug intended to help people stop​ smoking, 134 subjects were treated with ...

A: The power of the test, in this case is 1—β= 0.96 (that is, the complement of β), indicates the sensi...

question_answer

Q: Please show me how to do this equation

A: Given dataSpinner regions numbered 1 through 15, so total outcomes n(T) = 15No of outcomes favorable...