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...
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 ? who have received a medical examination during the past year. An interval estimate of the proportion ? with a bound of 0.035 and 98% 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 0.40.4, approximately how large...
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.
A random sample of 25 elementary school children was tested on the Stanford-Binet, yielding a mean...
A random sample of 25 elementary school children was tested on the Stanford-Binet, yielding a mean age of 6.25 years with a standard deviation of .88. Find the 99% confidence interval for the population mean and interpret your result.
Eric wants to estimate the percentage of elementary school children who have a social media account....
Eric wants to estimate the percentage of elementary school children who have a social media account. He surveys 450 elementary school children and finds that 280 have a social media account. Identify the values needed to calculate a confidence interval at the 99% confidence level. Then find the confidence interval. z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table of common z-scores above. Round the final answer to three decimal places. p1=
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...
The New York City school board wants to estimate the mean size μ of AP statistics classes in New York City high schools. The board obtained the following random sample of AP statistics class sizes: 24 29 29 23 25 24 33 26 24 29 27 26 22 32 24 21 19 29 31 26 29 31 16 Question 1. Use the data above to construct a 99% confidence interval for the mean class size μ. (calculate y and s...
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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