If you want to estimate the proportion of all RIT students who smoke within 0.05 with 90% confidence, what is the minimum sample size you will need?
a. 1562
b. 2033
c. 271
d. 549
Answer: c. 271
If you want to estimate the proportion of all RIT students who smoke within 0.05 with...
A random sample of biostatistics students will be taken to estimate the proportion of students who were also in Calculus II. What sample size would be necessary to propotion to within margin of error 0.10 with 90% confidence? Suppose it is known from the past that such propotion may be between 0.75 and 0.82. What is the size that you need? a. 46 b. 50 c. 45
Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. You have no preconceived idea of what that proportion might be. What sample size is needed if you wish to be 98 % confident that your estimate is within 0.05 of the true proportion? A sample size of nothing is needed. (Round up to the nearest whole number.)
Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. From research on other college campuses, you believe the proportion will be near 30%.What sample size is needed if you wish to be 98% confident that your estimate is within 0.02 of the true proportion? Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. From research on other college campuses, you...
Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. From research on other college campuses, you believe the proportion will be near 25%. What sample size is needed if you wish to be 99% confident that your estimate is within 0.02 of the true proportion? A sample size of is needed. (Doudun to the noroet whole number
We want to estimate the proportion of students who have credit card debt more than $2,000. What size sample should be obtained if we want to estimate the proportion within 3%; that is, the margin of error is 3%, with 95% confidence. a) suppose a prior study indicates that the percentage is 30% b) suppose we use no prior estimate of the percentage.
9) A researcher wishes to estimate, with 95% confidence, the population proportion of students who did not change their major. Her estimate must be accurate within 2.5% of the true proportion. a) What is the minimum sample size needed assuming that no prior information is available? b) What is the minimum sample size needed using a prior study that found that 34% of the students did not change their major?
Suppose there is a McDonald's next to your school and you want to estimate the proportion, p of all people at your school who go to McDonald's on a typical school day. (a) If you had no preliminary estimate for p. how many people should you include in a random sample to be 85% sure that the estimate will be within a distance of 0.05 from p? Make sure to show the formula with the numbers plugged in. (b) Complete...
Suppose there is a McDonald's next to your school and you want to estimate the proportion, p of all people at your school who go to McDonald's on a typical school day. (a) If you had no preliminary estimate for p. how many people should you include in a random sample to be 85% sure that the estimate will be within a distance of 0.05 from p? Make sure to show the formula with the numbers plugged in. (b) Complete...
You want to estimate the proportion of students at OSU who use Instagram. You select a random sample of 150 OSU students and find that 47% use Instagram. If you want to construct a 95% confidence interval, what will the margin of error be? As you calculate this, attempt to round along the way to three decimal places as you are engaging in your calculations in order to make the computations easier. Choose the answer option that is closest to...
please don't round mid calculation(: · Question 16 You want to obtain a sample to estimate a population proportion. At this point in time, you have no for the population proportion. You would like to be 90% confident that you esimate is within 0.05 of the true population proportion. How large of a sample size is required? Do not round mid-calculation. A group of researchers is interested in middle school students and their willingness to appear to stand out. A...