A random sample of 44 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $19.82 per car. The population standard deviation is $4.97 Estimate the mean bill for all cars from the drive-thru with 93% confidence. Round intermediate and final answers to two decimal places. $ <<μ $

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Answer: Given, n=85 μ=275 x=284 σ=30 (a) Option E. H0:μ=275  VS  HA:μ&gt;275(claim)

Q: A random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…

A: We have given that Sample size of eighth grade student =83 Sample mean =289 Population mean =280…

Q: A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a…

A: a. Null hypothesis: µ=260. Alternative hypothesis: µ&gt;260(claim). Correct answer is option (E) b.…

Q: Recent data suggest that nationally, scores on the Critical Reading section of the SAT follow a…

A:

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: From the provided information, Sample size (n) = 85 Sample mean (x̅) = 285 Population standard…

Q: Students at a major university are complaining of a serious housing crunch. Many of the university…

A: Given the mean distance commuted to school by students is 16.0 miles, and the standard deviation of…

Q: A random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…

A:

Q: The reading speed of second grade students in a large city is approximately normal, with a mean of…

A: For the given data Find the probability in part(e )

Q: A random sample of 82 eighth grade students' scores on a national mathematics assessment test has a…

A: Solution: State the hypotheses. Null hypothesis: That is, the mean score for the state’s eighth…

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

A: Sample size n=700 Sample mean x¯=640 Population Standard deviation σ=300

Q: A consumer advocacy group suspects that a local supermarket's 7-ounce packages of cheddar cheese…

A:

Q: A random sample of 75 eighth grade students' scores on a national mathematics assessment test has a…

A:

Q: A random sample of 88 eighth grade​ students' scores on a national mathematics assessment test has…

A: Given Information: Sample size (n) = 88 Sample mean (x¯) = 283 Population standard deviation (σ) =…

Q: advertising company plans to market a product to low-income families. A study states that for a…

A: Given Mean=23664 Standard deviations=6442

Q: DMV Wait Times A state Department of Transportation claims that the mean wait time for various…

A: 20. Hey, since there are multiple subparts posted, we will answer first three question. If you want…

Q: A random sample of 81 credit sales in a department store showed an average sale of $75.00. From past…

A: Solution: Let X be the amount of sale. From the given information, n=81, x-bar=$75 and σ=$27.

Q: A used car dealer says that the mean price of a​ three-year-old sports utility vehicle is ​$19,000.…

A: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we will…

Q: A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The…

A: The mean of the data is calculated as follows: Mean=515+507+...+51310         =493310…

Q: The reading speed of second grade students in a large city is approximately normal, with a mean of…

A: The given information is: population meanμ=89 Population standard deviationsσ=10 Assume that X is…

Q: A manufacturer claims that a new design for a hands-free bluetooth device has increased the range to…

A: The following information is provided. Sample size, sample mean and sample standard deviation.…

Q: A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The…

A:

Q: A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is…

A:

Q: A sociologist found that in a sample of 50 retired men, the average number of jobs they had during…

A:

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: The SAT Math scores have a bell-shaped distribution with a Mean of 567 and a Standard Deviation of…

A: We have given that,  Let the SAT scores are normally distributed with mean (mu) = 567 and standard…

Q: In high school X, approximately 9 percent of the students saw a certain movie on opening night. From…

A: In high school X, approximately 9 percent of the students saw a certain movie on opening night. From…

Q: A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The…

A: Calories in a mid-sized hamburger: 515 506 501 498 497 506 458 478 463 514 Sample size = n =…

Q: The average test scores in a Science class is normally distributed with a standard deviation of 8.…

A: From the above information we have, n=200x=170σ=8 We can use the following formula for estimate the…

Q: At a Hepsiburada distribution facility, workers are under pressure to complete orders as quickly as…

A: Given : λ=2 x ~Poisson (2) Standard deviation : sd=λ=2=1.4142

Q: Suppose the weights of seventh‑graders at a certain school vary according to a Normal distribution,…

A:

Q: At the 0.10 level of significance, can it be concluded that this represents a difference from the…

A: Given that Sample size n = 50 Sample mean = 9.2 Population SD = 3.2 Level of significance = 0.10

Q: A researcher wishes to estimate within $20 the average cost of postage a community college spends in…

A: GivenMargin of error(E)=20standard deviation(σ)=60confidence level = 90%

Q: A random sample of 75 eighth grade students' scores on a national mathematics assessment test has a…

A: Given Information :  A random sample of 75 eighth grade student’s scores on a national mathematics…

Q: A random sample of 76 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Given data is appropriate for testing of hypothesis . to test z-test for single mean . Because it is…

Q: Major league baseball salaries averaged $1.5 million with a standard deviation of $ 0.8 million in…

A: From the provided information, the average salary (µ) = $ 1.5 millionThe standard deviation (σ) =…

Q: A group of 51 randomly selected students have a mean score of 25.4 and a standard deviation of 3.1…

A:

Q: Boston Marathon: A sports statistician claims that the mean winning times for Boston Marathon…

A:

Q: A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a…

A: Given,sample size(n)=88sample mean(x¯)=281population standard…

Q: Tubes are manufactured in a company that has a mean of life, (hr = 800) and a standard deviation of…

A:

Q: random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400…

A: Given that Random sample size (n) = 64 Average (x¯) = 1400 Standard deviation (s) = 240 Confidence…

Q: A random sample of 89 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Solution: Given information: n= 89 Sample size x= 262 Sample mean μ= 260 Population mean σ= 35…

Q: The sample mean and sample standard deviation of all San Francisco student scores on the most recent…

A:

Q: A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least…

A: Given that, Sample size n=45 Sample mean life x¯=858 Sample standard deviation s=45 Claim: The mean…

Q: The reading speed of second grade students in a large city is approximately​ normal, with a mean of…

A:

Q: A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a…

A: State the hypotheses. That is, there is no sufficient to conclude that mean score for the state’s…

Q: A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is…

A: Population mean (µ) = 914Standard deviations (σ) = 20Sample size (n) = 54Sample mean (x̅) =…

Q: GMAT scores are approximately normally distributed with a mean of 547 and a standard deviation of…

A: Given: μ = 547σ = 95

Q: Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2 million in…

A:

Q: A random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…

A: From the provided information, Sample size (n) = 83 Sample mean (x̄) = 263 Population standard…