Ask Question, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Statistics and Probability Expert

Question: Who tweets? Do younger people use Twitter more often than older people? In a random sample of 316 adult Internet users aged 18 to 29, 26% used Twitter. In a separate random sample of 532 adult Internet users aged 30 to 49, 14% used Twitter.

(a) Calculate the standard error of the sampling distribution of the difference in the sample proportions (younger adults - older adults). What information does this value provide?

(b) Construct and interpret a 90% confidence interval for the difference between the true proportions of adult Internet users in these age groups who use Twitter.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M92576027
  • Price:- $15

Priced at Now at $15, Verified Solution

Have any Question?


Related Questions in Statistics and Probability

From a random sample of 41 teens it is found that on

From a random sample of 41 teens, it is found that on average they spend 31.8 hours each week online with a standard deviation of 3.65 hours. What is the 90% confidence interval for the amount of time they spend online e ...

A single person with a monthly taxable income of 2800 in

A single person with a monthly taxable income of $2800 in the 15% federal marginal bracket, has a state tax rate of 7.95% and social security taxes at 6.2%. This person forgoes consumption and instead places $230 into a ...

In 20 of families the father has celiac disease event f

In 20% of families the father has celiac disease (Event F) while the mother does not, in 15% of families the mother has celiac disease (Event M) and the father does not, and in 5% of families both the mother and the fath ...

Let a random sample be taken of size n 64 from a

Let a random sample be taken of size n = 64 from a population with a known standard deviation of 15. Suppose that the mean of the sample is 40. Find the 99% confidence interval for the mean of the population from which t ...

Help me study by answering this question a stock is just

Help me study by answering this question. A stock is just paid a dividend of $0.91 and is growing at a constant rate of 10 percent per year. If the required rate of return is 15 percent, what is the stock's expected pric ...

A manufacturer obtains clock-radios from three different

A manufacturer obtains? clock-radios from three different? subcontractors: 10?% from? A, 30?% from? B, and 60?% from C. The defective rates for these subcontractors are 3?%, 2 %, and 5?% respectively. If a defective? clo ...

According to a field poll 276 out of 615 of california

According to a Field Poll, 276 out of 615 of California adults feel that "education and our schools" is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of C ...

A study indicates that the weights of adults are normally

A study indicates that the weights of adults are normally distributed with a mean of 140 lbs and a standard deviation of 25 lbs. Find a value of weight  x  such that only 20% of adults weigh less than that. A. 136 B.190 ...

Introduction to epidemiology assignment -assignment should

Introduction to Epidemiology Assignment - Assignment should be typed, with adequate space left between questions. Read the following paper, and answer the questions below: Sundquist K., Qvist J. Johansson SE., Sundquist ...

Question suppose the gap is considering putting a factory

Question: Suppose the Gap is considering putting a factory outlet store on Main Street and they hire you to conduct some required research. You implement a survey and ask 225 students how much they believe they would spe ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As