ent attribution Question 12 Suppose we know that a confidence interval for a populationi (29,37), with...
Calculate a margin of error given a confidence interval Question In a questionnaire, a random sample of commuters were asked whether it takes them more than 30 minutes to commute to work in the morning. The resulting confidence interval for the proportion of commuters who drive more than 30 minutes to work in the morning is is (0.27,0.51) What is the sample proportion, p? Provide your answer below: FEEDBACK MORE INSTRUCTION SUBMIT Content attribution ch the web and your PC
Q1. [15pts] A beer producer needs to specify a confidence interval for the mean alcohol content of their beverages. They know that the standard deviation for the alcohol content of individual beverages is 1.0 ml/dL. What is the minimum sample size needed to create a 99 % confidence interval for the true alcohol a) content with a margin of error of at most 0.2 ml/dL? Suppose they measure the mean alcohol content from a random sample of 100 bottles and...
Week 6 Assignment: Confidence Interval for Population Mean- Population Standard Deviation Known Question supplement bottle is 16 pills. If we want to be 95 % confident The population standard deviation for the number of pills that the sample mean is within 5 pills of the true population mean, what is the minimum sample size that should be taken? in a Zo,01 Z0,005 Zo.10 Zo.05 Zo025 2.576 2.326 1.645 1.960 1.282 Use the table above for the z-score, and be sure...
1. A C level confidence interval is described as what? (3 points) Oan interval computed from a data sample by a method that has the probability C of producing an interval containing the true value of the parameter any interval within the margin of error O an interval with a margin of error C that is also correct C% of the time Oany interval that follows the 68-95-99.7 rules Oan interval computed from a data sample that guarantees that the...
Problem 6. Suppose that we know that the population standard deviation σ = 5. Then for a 90% confidence interval, how large should a sample be to estimate the population mean μ with a margin of error not exceeding 0.5?
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate while holding sample size constant, we can expect a. the width of the confidence interval to increase. b. the width of the confidence interval to decrease. c. the width of the confidence interval to remain the same. d. the sample size to increase. QUESTION 22 Which one of the following is a correct statement about the probability distribution of a t random variable? a....
QUESTION 1 Suppose we have a sample size of 100 and calculate a confidence interval. What will happen to that interval if we then get a sample size of 200 (all else equal). It will become narrower It will become wider. It will remain the same, because the mean is not changing It will get closer to 1.96. QUESTION 1 Suppose we have a sample size of 100 and calculate a confidence interval. What will happen to that interval if...
DQuestion 45 1.5 pts To calculate any confidence interval, we need to know the confidence level we want to use (i.e., 90%, 95%, or 99%), and which of the following (choose all that apply)? The population mean The point estimate 95 out of 100 population means The margin of error
Calculate a point estimate given a confidence interval Question The scores on a standardized test are normally distributed. If a random sample of standardized test scores is taken and the confidence interval is (92.3, 120.7), what is the sample mean X? Give just a number for your answer. For example, if you found that the sample mean was 12, you would enter 12. Provide your answer below:
FEEDBACK Content attribution QUESTION 14 . 1 POINT Using Simpson's rule with 6 subintervals, determine an upper bound for the error in estimating (3x + 2x²) dx. Provide your answer below: FEEDBACK Content attribution SUBMIT