Giving a test to a group of students, the grades and gender are summarized below   A B C Total Male 20 6 14 40 Female 17 15 4 36 Total 37 21 18 76 Let p represent the population proportion of all female students who received a grade of A on this test. Use a 85% confidence interval to estimate p to four decimal places if possible.  < p <

Q: Out of 300 people sampled, 156 had kids. Based on this construct a 90% confidence interval for the…

A: X = 156 N = 300

Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

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Q: Use the given data to construct a confidence interval for the population proportion p of the…

A: It is given that sample size (n) is 70  and x is 50.

Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: A survey found that 33 of 66 randomly selected women and 37 of 66 randomly selected men follow a…

A:

Q: A confidence interval was constructed to approximate a population proportion. the interval was from…

A: From the provided information, The confidence interval was from 30.5% to 41.5%.

Q: If n=30, 7(x-bar)=49, and s=14, construct a confidence interval at a 99% confidence level. Assume…

A:

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: It is given that n=195 and x=162. The sample proportion is 162/195 = 0.8308 The sample size is 195…

Q: Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals…

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Q: The test scores for a class of 155 students are computed. What is the location of the test score…

A: Given that  The test scores for a class of 155 students are computed n=155 Find the location of the…

Q: Psychologists at an university compared the levels of alcohol consumption of male and female…

A: We have given thatfor males:Sample size (n) = 126Sample mean (x̅) = 16.76Standard deviations (s) =…

Q: f n=300 and x=60, construct a 99% confidence interval estimate for the population proportion.

A: n=300 and x=60, construct a 99% confidence interval

Q: If n = 440 and X = 352, construct a 90% confidence interval for the population proportion, p. Give…

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Q: 24. Job Interviews In a Harris poll of 514 human resource professionals, 90% said that the…

A: From the parts b) and c), the 99% confidence interval is (0.8659 , 0.9341) and the 80% confidence…

Q: The principal randomly selected six students to take an aptitude test. Their scores were: 88.0 84.1…

A: Solution: Let X be the score. The given data is 88, 84.1, 74.9, 83.2, 83.7 and 85.5.

Q: Use the t-table or any statistical tool and report the t-score that you multiple by the standard…

A: Excel: The confidence level is 95%. Sample size is 5. Degrees of freedom is 5-1= 4. The t-score can…

Q: A survey of 41 students in grades 4 through 12 found 63% have classroom Wi-Fi access. Find the 99%…

A: It is given that sample size (n) is 41 and the sample proportion value is 0.63.

Q: The figure to the right shows the results of a survey in which 2000 college graduates from the year…

A: The objective of this question is to calculate the 99% confidence interval for the proportion of…

Q: Researchers studied the mean egg length (in millimeters) for a bird population. After taking a…

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Q: Construct a 95​% confidence interval of the population proportion using the given information.…

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.