Question: What is the minimal sample size needed for a 95% confidence interval to have a maximal margin of error of 0.1: (a) If a preliminary

What is the minimal sample size needed for a 95% confidence interval to have a maximal margin of error of 0.1:
(a) If a preliminary estimate for p is 0.25?
(b) If there is no preliminary estimate for p?

Step by Step Solution

★★★★★

3.35 Rating (173 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a b np1p ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

785-M-S-P-E (1180).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

Suppose x has a mound-shaped distribution with = 3. (a) Find the minimal sample size required so that for a 95% confidence interval, the maximal margin of error is E = 0.4. (b) Based on this sample...

Suppose x has a normal distribution with = 1.2. (a) Find the minimal sample size required so that for a 90% confidence interval, the maximal margin of error is E = 0.5. (b) Based on this sample size...

1. y + 2se (y) 2. se (p) 3. 2se (X-bar) 4. N (, 2 / n) 5. s / n 6. / n 7. 1 / (0.05) 2 8. [0,1] 9. p (1 p) / n 10. t 0.025 n1 (a) Sampling distribution of Xbar (b) Margin of error (c) 100%...

(a) Consider140binomial trials with44successes. Find a 90% confidence interval for the population proportion of successes p . (Round your answers to three decimal places.) lower limit upper limit (b)...

What is the minimal sample size needed for a 95% confidence interval to have a maximal margin of error of 0.1 in the following scenarios? ( enter a number. Round up the nearest whole number.) (a) a...

1. What price do farmers get for their watermelon crops? In the third week of July, a random sample of 43 farming regions gave a sample mean of x= $6.88 per 100 pounds of watermelon. Assume that is...

I dont understand any of these problems, please help. -/8.33 pointsBBBasicStat8Acc 8.3.002. In order to use a normal distribution to compute confidence intervals for p, what conditions on n.p and n.q...

1. The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1222 1306 1187...

8. In order to use a normal distribution to compute confidence intervals for p , what conditions on np and nq need to be satisfied? np 5 np > 5; nq > 5 np > 5; nq

1. The home run percentage is the number of home runs per 100 times at bat. A random sample of 43 professional baseball players gave the following data for home run percentages. 1.6 2.4 1.2 6.6 2.3...

The Sentry Parts Division of Camden Company plans to set up a facility with the capacity to make 10,000 units annually of an electronic computer part. The avoidable cost of making the part is as...

1. Create flow chart to print Even Numbers from 2 to 100. (print 2, 4, 6, . 100) 2. Create flowchart to print Multiplication Table for 5 from 1 to 12 (Follow the same format of Multiplication table:...

Today (year 0) you are planning for retirement. 'You plan to save for the next 25 years, making deposits of 320,000 into a savings account at the end of every year beginning next year and ending in...

Use your data set. Using the data set that you created in the previous exercise, find graphical and numerical summaries for bots and spam messages per day. The most common way to display the relation...

Marketing: Music Snoop Incorporated is a firm that does market surveys. The Rollum Sound Company hired Snoop to study the age distribution of people who stream music. To check the Snoop report,...

Accounting Records: Benfords Law Benfords Law states that the first nonzero digits of numbers drawn at random from a large complex data file have the following probability distribution (Reference:...

Fair Dice: Uniform Distribution A gambler complained about the dice. They seemed to be weighted! The dice were taken off the table and tested one at a time. One die was rolled 300 times and the...

1.How does the Electoral College work? a. Congress selects presidential candidates; voters then elect the president. b. Each state determines how it will select its electors; electors then elect the...

Capitalized cost is defined as the present workh of costs over an infinite analysis period. It can be shown that the factor (P/A,i%, N = infinity) is equal to (1/i), with the interest rate i in...

questions 17 & 18 QUESTION 17 What is the expected return on asset A if it has a beta of 0.3, the expected market return is 14%, and the risk-free rate is 5%7 A. 6.0% B.9.2% C.7.2% D.7.7% QUESTION 18...