A random sample of 49 drivers used on average 753 gallons of gasoline per year. The standard deviation of the population is 36 gallons. Find the 90% confidence interval of the mean for all drivers. Round intermediate answers to at least three decimal places. Round your final answers to the nearest whole number.

Q: The distribution of the lengths of a commercially caught fish is bell-shaped with mean 24 cm and…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: A random sample of 45 cars in the drive-thru of a popular fast food restaurant revealed an average…

A: given that,population standard deviation, σ =4.89sample mean, x =17.79size (n)=45

Q: Find the standard deviation of the data set. (Do not round until the final answer. Round final…

A: Given Data : Ages of Last 6 Presidents at InaugurationGeorge Bush 64Bill Clinton 46George W. Bush…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: A random sample of shoppers at a convenience store are selected to see how much they spent on that…

A: Standard deviation ,σ = 6.94confidence- level = 0.99So, level of significance = 1-0.99 = 0.01E =…

Q: If the grades are normally distributed and 8 students received a B, how many students took the…

A: Let C denote the grades of students. Given that X follows N(mean = 82, SD = 5), then  Z = (X -…

Q: THE INFORMATION BELOW REFERS TO THIS AND THE NEXT QUESTION. The heights of adult women in the…

A: A critical value is a point on the test distribution that is compared to the test statistic to…

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: Given,mean(μ)=200standard deviation(σ)=25

Q: People with z-scores about 2.5 on an IQ test are sometimes classified as geniuses. If IQ scores have…

A: The z-score denotes how many standard deviations away from the mean a raw score is The z-score can…

Q: Part a through b please. Thank you!

A: a. Question 1Let us first determine the confidence interval (the range of values that contain the…

Q: Use the data 2, 3, 3, 6, 6, 7. Add 2 to each of the numbers. How does this affect the mean? How does…

A:

Q: Provide a set of 20 data points that has a mean of 20, a median of 25, an IQR of 10, and a sample…

A: Data should have mean of 20, a median of 25, an IQR of 10, and a sample standard deviation between 9…

Q: Angela polled her first grade class about their family pets. The following data lists the number of…

A:

Q: It takes an average of 12.1 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The random variable is time to blood clotting.We have to test whether the population mean time for…

Q: Part 1 of 3 What is the probability that the sample mean cholesterol level is greater than 212? The…

A: The central limit theorem states that if you have a population with mean μ and standard deviation σ…

Q: Below represents the amounts that a random sample of employees reported that they spent on dinner…

A:

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

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Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A: mean (μ)=1543standard deviation (σ)=320 Z- score is given as Z=x-μσ The z- score of 1970 is…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

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Q: Complete the Chart for the following set of data. The Mean of the data is 30. Only fill in the…

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Q: Lisa took 4 courses last semester: Physics, Biology, History, and Calculus. The means and standard…

A: Lisa took 4 courses last semester, we need to convert Lisa's scores into z-scores. Since, z-score =…

Q: Find sd.The differences between two sets of dependent data are​ 0.4, 0.24,​ 0.22, 0.26, 0.34. Round…

A: The formula for sample standard deviation is,

Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…

A: The objective of this question is to find the height of a man given the z-score, the average height,…

Q: A random sample of 42 cars in the drive-thru of a popular fast food restaurant revealed an average…

A:

Q: Overweight Men For a random sample of 60 overweight men, the mean of the number of pounds that they…

A: From the provided information, Sample size (n) = 60 Sample mean (x̄) = 31 pounds Standard deviation…

Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

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Q: A candy manufacturer has replaced 5.17% of their chocolate bars with a new mystery flavor. Find the…

A: Given: Sample size (n) = 424 p(chocolate bars with a new mystery flavor) = 5.17% = 0.0517

Q: The standard deviation on your last test was 10. The average was a 70. The distribution had a normal…

A: To find out what percentage of the class scored between 60 and 80, we need to utilize the properties…

Q: H=34, o=4.5, the score is 2.5 standard deviations above the mean

A: Suppose the variable of interest is x.The mean is and the standard deviation is .

Q: A student takes a multiple-choice test that has 6 questions. Each question has four choices. student…

A: It is given that,  A student takes a multiple-choice test that has 6 questions i.e. n=6 Each…

Q: A person completes a timed task and is told that their z-score for the task is 1.36. The mean for…

A: Given: Population mean (µ) = 10.75 Population standard deviation (σ) = 2.40 z-score = 1.36

Q: standard deviation is s = 30. Determine the test statistic for this test.

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.