Fast-Food Bills for Drive-Thru Customers A random sample of 40 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $16.58 per car. The population standard deviation is $4.81. Estimate the mean bill for all cars from the drive-thru with 97% confidence. Round intermediate and final answers to two decimal places.

Q: Online courses: A sample of 260 students who were taking online courses were asked to describe their…

A: Given: Sample size(n) = 260 Sample mean x¯    =5.41 Sample standard deviation (s) = 0.89 Confidence…

Q: On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised…

A: Let X be amount of time spent alone and it is normally distributed. X~N2.9,1.4 , where μ=2.9and…

Q: On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised…

A: From the provided information, Mean (µ) = 2.8 hours Standard deviation (σ) = 1.6 hours

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: The mean is 5.8 and the standard deviation is 2.4.

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A:

Q: Jason took his Siberian Husky dog to the veterinarian. The dog was put on a scale and found to weigh…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a…

A: a. The given information is that the sample of 60 passengers is taken to determine the total cost of…

Q: Dalton is a public school teacher in Burlington. After a conversation with a colleague in Sudbury,…

A: Explanation:Denote µ1 = true population mean for Burlington teachers’ salary and µ2 = true…

Q: Fill in the blanks. The depth of the snow in my yard is normally distributed, with a mean of 2.5…

A: Let X: depth of snow in my yard Given that, X~N(2.5 , 0.252)

Q: On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised…

A:

Q: Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a…

A:

Q: Fast-Food Bills for Drive-Thru Customers A random sample of 50 cars in the drive-thru of a popular…

A: Given Data : Sample Size, n = 50.0 Sample Mean, x̄ = 19.92 standard…

Q: P Value please?   A recent study found that 61 children who watched a commercial for potato chips…

A:

Q: Check our blood pressure: In a recent study, the Centers for Disease Control and prevention reported…

A: Given data,Mean μ=80.3sd    σ=9.7P(X<68)=?

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A: Given  μ=5.5,σ=2.5 Q1=μ-0.67σ Q3=μ+0.67σ

Q: An article in a local town newspaper discusses the results of state test scores in their town. The…

A: Answer:-

Q: An article in a local town newspaper discusses the results of state test scores in their town. The…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised…

A: Note: Hi there! Thank you for posting the question. As there are  multiple sub parts, according to…

Q: An elevator accident occurred with 16 people inside. The capacity will be exceeded if 16 people have…

A: GivenThe mean weights of people X__ are normally distributedmean=μ=172.4Standard…

Q: SAT Scores. Each year, thousands of high school students bound for college take the Scholastic…

A: The mean SAT math score is 528 with a standard deviation of 105. The mean SAT verbal score is 475…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised…

A: Let , X be the amount of time child spends alone per day. X follows Normal distribution with mean μ…

Q: Placement exams An incoming freshman took hercollege’s placement exams in French and mathematics.In…

A: In French exam, the freshman scored 82 and in Math exam she scored 86. The mean score for French is…

Q: Stress at work: In a poll about work,44%of respondents said that their jobs were sometimes or always…

A: If an experiment has only two outcomes, they follow bernoulli distribution. If the experiment is…

Q: You are a consumer advocate. A particular brand of tires state that they last for 50,000 miles…

A: Given that, You are a consumer advocate.  A particular brand of tires state that they last for…

Q: , 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised children live in rural…

A: Given: μ=3.1, σ=1.5 (a)As the population distribution is normal, it can be said that the…

Q: On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised…

A: Since, you have you have posted a question with multiple subparts we will solve first three subparts…

Q: BA six-year study in a certain country found that birth weights of newborns were normally…

A: it follows normal distribution Z=x-μσZ=3000-3758496=-758496=-1.5282

Q: 5. Foot Locker has 3400 stores in the U.S. The company uses sales per square foot as a measure of…

A: Given that, σ=$80,n=64 The probability that the sample of 64 stores will have a sales average within…

Q: You are a consumer advocate.  A particular brand of tires state that they last for 50,000 miles…

A: We have to find That which statastics test use.. from given options..

Q: n a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: Given X is normal Distributed with mean µ = 5.7 and standard deviation σ = 2.3 now will use standard…

Q: Fast-Food Bills for Drive-Thru Customers A random sample of 42 cars in the drive-thru of a popular…

A: Step-by-step procedure to obtain the 98% confidence interval for the mean bill for all cars from the…

Q: A college admissions officer takes a simple random sample of 81 entering freshman. The admissions…

A: (a). Identify the parameter that is estimated by the admissions officer: The sample size is n = 81.…

Q: distributed. We randomly s

A: According to the scenario, On the planet of Mercury, 4-year-olds average 2.9 hours a day…

Q: On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised…

A:

Q: On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised…

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

Q: Internet Viewing A researcher wishes to estimate the average number of minutes per day a person…

A:

Q: You work in a bottling plant that produces an average of 7000 bottles a day. A software company…

A: The provided sample mean is Xˉ=7010\bar X = 7010  and the sample standard deviation is s=7s = 7 ,…

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A:

Q: The depth of the snow in my yard is normally distributed, with a mean of 2.5 inches and a standard…

A: Given information- Let X represents the depth of the snow in my yard which is normally distributed.…

Q: Convenience sampling was used to ask 13 students how much money they spent on books this quarter.…

A: A convenience sample is a type of non-probability sampling method where the sample is taken from a…

Q: at state university took a biology test. the scores were normally distributed with a mean of 70 and…

A: The corresponding z-values needed to be computed are:

Q: On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised…

A: From the provided information, Mean (µ) = 3.1 hours Standard deviation (σ) = 1.6 hours The…

Q: The depth of the snow in my yard is normally distributed, with a mean of 2.5 inches and a standard…

A: μ=2.5σ=0.25 The value of one standard deviation below the mean is =μ-σ=2.5-0.25=2.25 The value of…

Q: On the planet of Mercury, 4-year-olds average 3 hours a day unsupervised. Most of the unsupervised…

A:

Q: pite tuition skyrocketing, a college education is still valuable. Recent calculations by the Federal…

A: We have given that, The data set of the sample are : 36882, 35854, 43692, 40776, 70869, 47468 Then,…

Q: On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised…

A: