Confidence interval for proportion of people in population

Assignment Help Basic Statistics
Reference no: EM132479259

a) 420 are opposed to an income tax increase. Construct a 95% confidence interval for the proportion of people in the population opposed to this tax increase. Interpret your result.

b) The internal auditing staff of a local lawn-service company performs a sample audit each quarter to estimate the proportion of accounts that are current (between 0 and 60 days after billing). The historical records show that over the past 8 years 70 percent of the accounts have been current. Determine the sample size needed in order to be 99 percent confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.

Reference no: EM132479259

Questions Cloud

Find the probability that a person will wait more : Find the probability that a person will wait more than 6 minutes. round your answer to four decimal places.
Systolic blood pressure in the right arm : Given that the systolic blood pressure in the right arm is 90mm? Hg, the best predicted systolic blood pressure in the left arm is
What is the amount of cash that Wasp receives today : Describe the recording procedures for the issuance, retirement, and paying of interest for installment notes. What amount of cash that Wasp receives today
Standard deviation of the sampling distribution : What are the mean and the standard deviation of the sampling distribution of? What is the probability that at least 30 accounts will be classified as delinquent
Confidence interval for proportion of people in population : Construct a 95% confidence interval for the proportion of people in the population opposed to this tax increase. Interpret your result.
What is the appropriate statistical test : To figure out which coffee is preferred, what is the appropriate STATISTICAL TEST she should use? (Assume her data is normally-distributed).
Hypothesis test on the validity of the report : In the annual report by the Syarikat Ajaysoft Sdn Bhd, the average annually income of project leader is RM49, 000.00. If from a random sample of 625
Evidence that the mean loc has increased : At 95% confidence level, does the experiment provide enough evidence that the mean LOC has increased.
What is the response of a muscle that has been stretched : What is the response of a muscle that has been stretched? What are the nerves to the body wall in the thoracic area called?

Reviews

Write a Review

Basic Statistics Questions & Answers

  What are the risks of using harry potter 7 data

a. What are the risks of using Harry Potter 7 data in predicting your new demand curve for the Harry Potter sequel? (15%)

  Describe an appropriate model for the number of cider apples

Describe an appropriate model for the number of cider apples that may come from that tree. Justify your model.

  Sample correlation coefficient-weekly sales and shelf space

Compute the value of the sample correlation coefficient between weekly sales and shelf space. Is the correlation between weekly sales and shelf space significant at the .01 level of significance? What is the estimated regression equation?

  What is the standard deviation of the number of children

What is the standard deviation of the number of children they would expect to have until the first blue-eyed child?

  Find average profit of companies with units of sales

We use statistical software to do the prediction and obtain the following output. 95% confidence interval for the average profit of companies with 500 units of sales is?

  Translate into symbolic form - funding for nuclear fusion

Translate the following arguments into symbolic form.- Either funding for nuclear fusion will be cut or if sufficiently high temperatures are achieved in the laboratory, nuclear fusion will become a reality.

  What is the probability of getting full-house

What is the probability of getting Full-House, which is two of a kind and three of kind, in the first hand (Example 2 Aces and Three Queens)?

  Describe the sampling distribution

A dean has found that over the years, about 15% of students who begin their college work in her program do not finish. This year, 90 students will begin her program; define P^ to be the proportion who will finish.

  Express solution set using interval notation

Solve the inequalities for the following exercises. Express solution set using interval notation, and graph the solution set on a number line

  Computing degrees of freedom for f statistic

Store used ANOVA to test if mean sales for each credit card were equal. What are the degrees of freedom for F statistic?

  How many units of each product should produce

Formulate and use linear programming to solve the following problem. A firm wants to determine how many units of each of two products (products X and Y).

  Carries large payloads into space and returns

The space shuttle, shown in Figure P9.9 (a), carries large payloads into space and returns them to earth for reuse [19]. The shuttle uses elevons at the trailing edge of the wing and a brake on the tail to control the flight during entry.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd