ZuoTi.Pro
Question

Health advocates are interested in estimating the proportion of adult Canadians (21 and over) with high...

  1. Health advocates are interested in estimating the proportion of adult Canadians (21 and over) with high cholesterol levels (over 200mg/dl). How large a sample should be used to estimate the true proportion to within .02 with level of confidence (reliability) 90% if
    (a) a pilot sample gave .27 as a prior estimate for p?

    (b) no prior estimate of p is available?

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Givem critikal value 2 2. using 7-table. ayapilet sample gase o2asa pmer fero P 2 estimate Ansiuea ter P 0.27 은 siz - sample s12e--A 2 1.6451 (o.27)(1-o.27) 0.02 t333.39 sample siz133bno pares estimate of Pis available2 Answer - A-1 2| 1645 (0.51-0.5) 1631.27 Sample siz e -巨(1re) ー 2. o.02 Samp sample-size-nニ1 1 63 2 1

0 0
Add a comment
Know the answer?
Add Answer to:
Health advocates are interested in estimating the proportion of adult Canadians (21 and over) with high...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Health advocates claim that over 20% of adult Canadians (21 and over) have high cholesterol levels...

    Health advocates claim that over 20% of adult Canadians (21 and over) have high cholesterol levels (i.e. over 200 mg/dl). A pilot sample of 30 adult Canadians produced 8 individuals with high cholesterol levels. Is there sufficient evidence to support the health advocates' claim? Test at α = 0.05.

  • A business student is interested in estimating the 95% confidence interval for the proportion of students...

    A business student is interested in estimating the 95% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within six percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available? Use Table 1. (Round intermediate calculations to 4 decimal places and...

  • 9. Some teachers and students are interested in estimating the proportion p of infected geese with...

    9. Some teachers and students are interested in estimating the proportion p of infected geese with a certain virus. Determine the sample size n such that the margin of error for the estimate of p does not exceed € = 0.03 with 95% confidence. A) 1068 B) 1067 C) 510 D) 511 E) 208

  • The Dean of engineering is interested in estimating the proportion of incoming students at her university...

    The Dean of engineering is interested in estimating the proportion of incoming students at her university that plan to study engineering. During the university’s orientation, the office staff managed to survey 120 students during the lunch break. Of those surveyed, 25 students said they were interested in studying engineering. Compute a 95% confidence interval that estimates the proportion of incoming students that plan to study engineering. Using the information provided, what sample size would be needed for the width of...

  • Suppose we are interested in estimating the proportion of a population using a simple random sample...

    Suppose we are interested in estimating the proportion of a population using a simple random sample of size n. i. State a suitable estimator of the population proportion as well as its sampling distribution. Mention any assumptions which you make. ii. Explain statistically how to determine the minimum sample size necessary to estimate a population proportion to within e units. iii. Provide a practical marketing example of a 95% confidence interval for a proportion. iv. Explain the purpose of the...

  • a. You wish to compute the 95% confidence interval for the population proportion. How large a...

    a. You wish to compute the 95% confidence interval for the population proportion. How large a sample should you draw to ensure that the sample proportion does not deviate from the population proportion by more than 0.12? No prior estimate for the population proportion is available. Round intermediate calculations to at least 4 decimal places and "z" value to 3 decimal places. Round up your answer to the nearest whole number.)   Sample Size - b. A business student is interested...

  • 0 pts A large Midwestern university is interested in estimating the mean time that students spend...

    0 pts A large Midwestern university is interested in estimating the mean time that students spend at the student recreation center per week. A previous study indicated that the standard deviation in time is about 25 minutes per week. If the officials wish to estimate the mean time within ± 4 minutes with a 90 percent confidence, what should the sample size be? 106 Can't be determined without the sample mean. 105 105.685

  • Please do not use excel or spreadsheet! An insurance company is interested in estimating the percentage...

    Please do not use excel or spreadsheet! An insurance company is interested in estimating the percentage of auto accidents that involve teenage drivers. Suppose the percentage of auto accidents that involved teenage drivers last year was 15%. The company wants to know if the percentage has changed this year. They check the records of 600 accidents selected at random from this year and note that teenagers were at the wheel in 60 of them. (a) Create a 90% confidence interval...

  • A parks and recreational board in Birch County is interested in estimating the proportion of its...

    A parks and recreational board in Birch County is interested in estimating the proportion of its residents in favor of having more public parks in that county. A random sample of Birch County residents was selected. All the selected residents were asked, "Are you in favor of having more public parks in your county?" A 98% confidence interval for the proportion of residents in favor of having more public parks in that county was calculated to be 0.54 + 0.03....

  • A public health major wants to estimate the proportion of students that watch network news on...

    A public health major wants to estimate the proportion of students that watch network news on a regular basis. She has no previous knowledge and doesn't want to guess about this proportion. Assuming the worst-case-scenario, how large of a random sample (n) does she need to take if she wants the estimate to be within 0.07 of the true population value with 90% confidence? On=138 On=139 but 40 should be used On=139 On=138 but 40 should be used

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT