A firm having 4000 employees took a random sample of 25 in order to estimate their average annual state tax payment with 99% confidence. If the results were  x̅ = $640 and s = $20, what is the best interval estimation

Q: ung people are driving. In 1983, 87% of 19-year-olds had a driver’s license. Twentyfive years later…

A: (a) Given: Sample Proportion \hat pp^​ = 0.870.87 NN = 12001200 The critical value for…

Q: For a given line of best fit, you compute that r=0 using n=50 data points. Can the line be used for…

A: From the given information, Correlation coefficient: Correlation coefficient is the measure of…

Q: According to a study, a cup of coffee contains an average of 118 milligrams (mg) of caffeine, with…

A: Answer: Using the given data, Margin of error (E) = 5 mg Range of the amount per cup is 55 to 189…

Q: Suppose you wish to determine the proportion of college students in NC who receive some form of…

A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: Sales team of a New Ventures Company is in the process of introducing a new product. As an initial…

A: We want to find the sample size.

Q: 7. Create a confidence interval for o using the following information: Ages of people driving in the…

A:

Q: n Find the size of the sample needed to estimate the difference between the proportions of Democrats…

A:

Q: Facing the threat of unemployment rates reaching a new high, the Australian government decided to…

A:

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: The formula for the sample size is as follows:

Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of the…

Q: How may we enhance confidence in a point estimate?

A: We know that, if the sample size (n) tends to infinity then sample statistic tends to population…

Q: A statistics student is interested in estimating the percentage of college students that prefer hot…

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Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: The scores on a standardized test for 322 students in nontraditional math classes were compared to…

A: We have find given confidence interval..

Q: How many people must be surveyed if we want to estimate the percentage of students weigh more than…

A: Given: The margin of error = 3%=0.03 Confidence level = 98% Since the proportion is students is not…

Q: A hospital administrator wants to estimate the proportion of patients whose hospital stay exceeds a…

A: Given Margin of error=0.06 P-cap=0.5

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: By means of a pilot survey, it is already known that the proportion of residents in opposition to…

A: Formula for sample size is,

Q: Suppose you wish to determine the proportion of college students in your state who receive some form…

A:

Q: A researcher investigated whether the temperature of milk, x, can be used to predict the milk's pH…

A: In this context, it is given that The prediction interval for the pH of a glass of milk whose…

Q: An epidemiologist wants to estimate the proportion of residents in her city that carry the Hepatatis…

A:

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: researcher wishes to estimate the proportion of drivers who use their mobile phone while driving. A…

A: Given data: Proportion of drivers = 0.38 Sample size(n)= 28 To find: The standard error of the…

Q: estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length…

A: The average length of the trip in the United States was 9.72 miles with margin of error as 0.22…

Q: doctor wants to estimate the mean HDL cholesterol of all 20 to 29 year old females. How many…

A: Given s=11.2 E=2

Q: Q3. Calculate Estimated Standard error (S»)from the following data:_ 3 4 5 2 y 3 4 5

A: Regression:   Regression is a technique that is used to determine relationship between two or more…

Q: A confidence interval for the difference in the number of friends that men and women have was found…

A: The formula of the midpoint of the confidence interval formula is,

Q: In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length…

A: We have to find confidence interval value.....

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

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Q: An economist wants to know if the proportion of the U.S. population who commutes to work via…

A: The objective is to find the sample size required if an economist wants an estimate of the…

Q: The mean score of Grade 11 students in a General Math examination was observed to be 75 with a…

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Q: A confidence interval for a mean is (-11, 10). This interval would be wider if O The sample mean was…

A: Given  CI for μ is (-11,10) Farmula used Length of CI =2* Zc* s/√n

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.