A municipality wishes to determine the average utility bill for its county's population. In a random sample of 100 customers, it was found that the sample average utility bill was $112.59. Assuming the population standard deviation is $18.53, find the margin of error of the confidence interval with a 97% confidence level. Use the table of values below to assist you in determining the confidence coefficient. Round your margin of error to 2 decimal places, as needed. 1.881 1.9602.0542.170 2.326 Provide your answer below:

Q: 1. In a sample of 50 wine tasting rooms, the average amount of daily sale population standard…

A: As the population standard deviation is known, we will use z distribution.   (a) At 95% confidence…

Q: The General Social Survey asked: “How many e-mails do you send in a day?” The results of 928…

A: Given Information: Sample size (n) = 928 Sample mean (x¯) = 10.4 Standard deviation (s) = 28.5 To…

Q: A small business ships specialty homemade candies to anywhere in the world. Past records indicate…

A: Solution-:  Here, is unknown so we use t-test Given: We find, (a) What is the standard error? (b)…

Q: How much money does the average professional football fan spend on food at a single football game?…

A:

Q: Use the given confidence interval to find the population proportion margin of error  0.09<?<0.33

A: Form the given data we have, p^+MOE = 0.33           ......(1)p^-MOE = 0.09           ......(2)

Q: If a sample of 25 fish from my pond has mean weight 157 grams with a standard deviation of 8.3 grams…

A: Given: σ = 8.3 grams  n = 25

Q: Determine the sample size needed to construct a 95% confidence interval for the population mean, μ,…

A:

Q: Aresearcher did a pilot sample of 25 individuals with a population standard deviation of 0.40. How…

A:

Q: in order to construct a 95% confidence interval for the population mean when the population…

A: It is an important fact in hypothesis testing problem .It is widely used in statistics .

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

A: Given Mean=235 s=15.7 n=12

Q: Determine the sample size needed to construct a 95% confidence interval for the population mean, μ,…

A:

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A:

Q: Wal-Mart Stores say that their new line of plasma televisions will last for 61,000 hours. You decide…

A: a. Confidence interval: Since the population standard deviation is unknown, t distribution can be…

Q: The owner of the AGT Gas Station wishes to determine the fraction of customers who pay using a…

A:

Q: A cell phone company claims that the average time a person spends on their phone is 12.8 hours a…

A: Let μ denote the population mean and x¯ denotes the sample mean. Then, μ=12.8 and x¯=12.2. Let n be…

Q: In a random sample of 108 young adults, the average time per day spent in bed asleep was 7.15 hours.…

A:

Q: Q1: A business school placement director wants to estimate the mean annual salaries 5 years after…

A: Obtain the 90% confidence interval for the population mean annual salaries 5 years after student…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: We have to find sample size....

Q: A bank officer wants to determine the amount of the average total monthly deposits per customer at…

A: Given,   Margin of error = 200 Standard deviation = 1000   Critical value: Using z-table, the…

Q: A random sample of 100 packs of apples with a professed weight of 1kg was found to have mear 1020g…

A: Consider X as the random variable that indicates the weight of an apple. The provided information is…

Q: The measured voltage amounts from a sample of 27 households have a mean of 123.59 volts and a sample…

A: Confidence interval when population standard deviation is not known: The formula of confidence…

Q: Find the length of a 99% confidence interval for the mean of the sample with a standard deviation of…

A: We have given that the 99% confidence interval for the mean of the sample with a standard deviation…

Q: Q8 The average weight of 20 students in Bandar Baru Sintok school was found to be  165lb with a…

A:

Q: 3. Use the given degree of confidence and sample data to construct a confidence interval for the…

A:

Q: . Data from a sample of 576 people in a city was used to estimate the mean monthly bill paid by city…

A: We associate with the interval estimate is called a confidence interval. This probability indicates…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: Margin of Error: margin of error of a point estimate provides the extent of accuracy with which the…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: It is given that confidence level is 0.96, population standard deviation is 300 and margin of error…

Q: A department store chain is interested in estimating the mean amount its credit card customers spent…

A: Conditions for using standard normal distribution to construct confidence interval for population…

Q: Ten years after graduation, the salaries of Heriot-Watt University graduates are Normally…

A: Let X ~ Normal( 55000, 11000)

Q: 530 males in the sample who gave a numeric response from 0 to 6, the mean was 2.51 and the standard…

A: Provided information is, n =530 x̅ =2.51 s =0.87 90% confidence interval can be calculated as:…

Q: or a sample of 121 that has a mean of 6540 and a standard deviation of 780, calculate the 90%…

A:

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A:

Q: The heights of a simple random sample of 400 male high school sophomores in a Midwestern state are…

A: Given info: The heights of a simple random sample of 400 male high school sophomores in a Midwestern…

Q: A small business ships specialty homemade candies to anywhere in the world. Past records indicate…

A:

Q: Assuming that the population is normally distributed, construct a 95% confidence interval for the…

A: Construct the 95% confidence interval for the population mean. The 95% confidence interval for the…

Q: (a) Does the size of the orifice affect the mean percentage of radon released? Use a =0.05. (b) Find…

A: Here the mean and variance of various groups orifice diameter are SUMMARY       Groups Count…

Q: An article reported that for a sample of 44 kitchens with gas cooking appliances monitored during a…

A: We will need to use the formula below to find n We have: s=standard deviation = 182 E=60/2=30…

Q: In a random sample of 50 people, the mean body mass index (BMI) was 27.7 and the standard deviation…

A: given that,sample mean, x =27.7standard deviation, s =6.12sample size, n =50standard error = sd/…

Q: Assuming that the population is normally distributed, construct a 90% confidence interval for the…

A: Solution-: We find 90% confidence interval for the data 1,2,3,4,5,6,7,25 Also, we find confidence…

Q: An engineer is taking density readings along a recently constructed earthen dam. If the sample…

A:

Q: A marketing firm wants to estimate how much root beer the average teenager drinks per year. A…

A:

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

A: We have given that  Sample size n= 30 Sample mean = 90 Standard deviation = 6.7 99% confidence…

Q: A study of a local city is being conducted to find out the average number of people that use public…

A: It is given that confidence level is 0.90, standard deviation is 100 and margin of error E is 11.

Q: The Wall Street Journal reported that automobile crashes cost the United States $162 billion…

A: Margin of error (E): The margin of error for the sample mean when the population standard deviation…

Q: 1) In an effort to estimate the mean amount spent per customer at Oliver's Eatery in Astoria,…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A medical devices company wants to know the number of hours its MRI machines are used per day. A…

A: Given information- Population standard deviation, σ = 4 hours Confidence interval = 0.98…

Q: A bank wishes to estimate the mean credit card balance owed by its customers. The population…

A: We have to find sample size ....

Q: In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of…

A: The sample mean is 18 pounds. Population standard deviation, σ is 7.5 pounds. The sample size, n is…