A random sample of elementary school children in New York state is to be selected to...
A random sample of elementary school children in New York state is to be selected to estimate the proportion ?p who have received a medical examination during the past year. An interval estimate of the proportion p with a margin of error of 0.035 and 99% confidence is required.
(a) Assuming no prior information about p^ is available, approximately how large of a sample size is needed?
n=
b) If a planning study indicates that p^ is around 0.70.7, approximately how large of a sample size is needed?
n=
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A random sample of elementary school children in New York state
is to be selected to...
Previous Problem List Next (1 point) A random sample of elementary school children in New York...
Previous Problem List Next (1 point) A random sample of elementary school children in New York state is to be selected to estimate the proportion p who have received a medical examination during the past year. It is desired that the sample proportion be within 0.015 of the true proportion with a 98% level of confidence (a) Assuming no prior information about p is available, approximately how large of a sample size is needed? Don't forget to round up. (b)...
b.) A state-wide survey indicates that the proportion is 0.65. Using this estimate, what sample size...
b.) A state-wide survey indicates that the proportion is 0.65. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.07 2) A researcher wants to construct a 99% confidence interval for the proportion of elementary school students in Seward County who receive free or reduced-price school lunches.
anyone hlep me with this four problme please!!! 6) A random sample of high school girls...
anyone hlep me with this four problme please!!!
6) A random sample of high school girls were asked how many hours per week they use social media. The sample mean of the 25 girls was 9 with standard deviation 2.7. What is the 90% confidence interval for the true mean for the hours per week high school girls use social media? Assume the population is normally distributed. 7) A random sample of 40 men were asked how if they enjoyed...
Problem 6: [7 points) A New York Times/CBS survey of 224 children of ages 9 to...
Problem 6: [7 points) A New York Times/CBS survey of 224 children of ages 9 to 17 was conducted shortly after the January 28, 1986, space shuttle disaster. Two-thirds of the children said that they would like to travel in space. (a) Give a point estimate of p, the true proportion of children who would like to space travel. [1] (b) Construct a 90% confidence interval for the proportion of children of ages 9 to 17 in 1986 who would...
NEED HELP WITH THIS IMPORTANT QUESTION!! A random sample of 7792 dentists in New York showed...
NEED HELP WITH THIS IMPORTANT QUESTION!!
A random sample of 7792 dentists in New York showed that 2976 provided some charity care. Let p be the (unknown) true proportion of dentists in New York who provide some charity care. We want to estimate p a) What was the sample proportion, p, of dentists in the sample who provided some charity care? b) What was the sample proportion of dentists in the sample who provided no charity care? c) what is...
a. Assume that a sample is used to estimate a population proportion p. Find the 95%...
a. Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 198 with 42 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 95% C.I. = b. A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 0.5% margin of error at a 99% confidence...
The New York City school board wants to estimate the mean size μ of AP statistics...
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A researcher wishes to estimate, with 99% confidence, the population proportion of adults who say chocolate...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who say chocolate is their favorite ice cream flavor. Her estimate must be accurate within two% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 44% of the respondents said their favorite flavor of ice cream is chocolate. (c) Compare the results from parts (a) and...
1- You want to estimate the proportion p of defective light bulbs produced in a factory....
1- You want to estimate the proportion p of defective light bulbs produced in a factory. Suppose you want to estimate p within .01 from the sample proportion X of defective items at 95 percent level of confidence. How large a sample would you take? (Round upward only.) Required Sample Size n = 2- You want to estimate the proportion p of people who oppose capital punishment. To estimate p within .02 from the sample proportion Xwith 99 percent level...
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you...
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=16%p∗=16%. You would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?
Previous Problem List Next (1 point) A random sample of elementary school children in New York state is to be selected to estimate the proportion p who have received a medical examination during the past year. It is desired that the sample proportion be within 0.015 of the true proportion with a 98% level of confidence (a) Assuming no prior information about p is available, approximately how large of a sample size is needed? Don't forget to round up. (b)...
b.) A state-wide survey indicates that the proportion is 0.65. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.07 2) A researcher wants to construct a 99% confidence interval for the proportion of elementary school students in Seward County who receive free or reduced-price school lunches.
anyone hlep me with this four problme please!!!
6) A random sample of high school girls were asked how many hours per week they use social media. The sample mean of the 25 girls was 9 with standard deviation 2.7. What is the 90% confidence interval for the true mean for the hours per week high school girls use social media? Assume the population is normally distributed. 7) A random sample of 40 men were asked how if they enjoyed...
Problem 6: [7 points) A New York Times/CBS survey of 224 children of ages 9 to 17 was conducted shortly after the January 28, 1986, space shuttle disaster. Two-thirds of the children said that they would like to travel in space. (a) Give a point estimate of p, the true proportion of children who would like to space travel. [1] (b) Construct a 90% confidence interval for the proportion of children of ages 9 to 17 in 1986 who would...
NEED HELP WITH THIS IMPORTANT QUESTION!!
A random sample of 7792 dentists in New York showed that 2976 provided some charity care. Let p be the (unknown) true proportion of dentists in New York who provide some charity care. We want to estimate p a) What was the sample proportion, p, of dentists in the sample who provided some charity care? b) What was the sample proportion of dentists in the sample who provided no charity care? c) what is...
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