Many small restaurants in Portland, Oregon, and other cities across the United States do not take reservations. Owners say that with smaller capacity, no-shows are costly, and they would rather have their staff focused on customer service rather than maintaining a reservation system. However, it is important to be able to give reasonable estimates of waiting time when customers arrive and put their names on the waiting list. The file RestaurantLine contains 10 observations of number of people in line ahead of a customer (independent variable x) and actual waiting time (dependent variable y). The estimated regression equation is: ŷ=7.82+8.84x and MSE=113.9197. Point estimate for customers with 3 people on the waitlist is 34.3 minutes. b. Develop a 95% confidence interval for the mean waiting time for a customer who arrives with three customers already in line (to 2 decimals). c. Develop a 95% prediction interval for Roger and Sherry Davy's waiting time if there are three customers in line when they arrive (to 2 decimals).

Many small restaurants in Portland, Oregon, and other cities across the United States do not take reservations. Owners say that with smaller capacity, no-shows are costly, and they would rather have their staff focused on customer service rather than maintaining a reservation system. However, it is important to be able to give reasonable estimates of waiting time when customers arrive and put their names on the waiting list. The file RestaurantLine contains 10 observations of number of people in line ahead of a customer (independent variable x) and actual waiting time (dependent variable y). The estimated regression equation is: ŷ=7.82+8.84x and MSE=113.9197. Point estimate for customers with 3 people on the waitlist is 34.3 minutes. b. Develop a 95% confidence interval for the mean waiting time for a customer who arrives with three customers already in line (to 2 decimals). c. Develop a 95% prediction interval for Roger and Sherry Davy's waiting time if there are three customers in line when they arrive (to 2 decimals).

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.2: Arithmetic Sequences

Problem 68E

See similar textbooks

Similar questions

5 agin
A manufacturer of exercise equipment knows that 15% of their products aredefective. They also know that only 35% of their customers will actually use the equipment in the first year after it is purchased. If there is a one-year warranty on the equipment, what proportion of the customers will actually make a valid warranty claim?
A new drug is released to market and it has been determined that the drug is responsible for causing hypertension among those individuals who take the drug. If 30,276 individuals were prescribed the drug in its first year on the market and 17,620 individuals developed hypertension, what is the point prevalence of hypertension among those individuals prescribed the drug, after the drug’s first year on the market? 0.00582 0.05820 0.58200 5.82000
Listed below are amounts (in millions of dollars) collected from parking meters by a security service company and other companies during similar time periods. Security Service Company:Security Service Company: 1.51.5 1.71.7 1.41.4 1.31.3 1.61.6 1.41.4 1.71.7 1.51.5 1.41.4 1.61.6 Other Companies:Other Companies: 1.71.7 1.91.9 1.61.6 1.81.8 1.61.6 1.81.8 1.51.5 1.61.6 1.91.9 1.61.6 Please show me how to locate the coefficient of variation for each of the two samples, then compare the variation, using the coefficient of variation for the amount collected by the security service company what is the percentage?
Calculate the point prevalence for Alzheimer’s disease among individuals 65 years of age or older in a county that has 200,000 individuals who are 65 years of age or older, if 22,223 individuals who are 65 years of age or older have the disease. 0.0111 0.1111 0.8889 0.9889
It is a collection of all possible individuals, objects, or measurements of interest.
2. Ceramic items are “baked” in a gas-fired tubular-shaped oven is lots of 100 units. The items are linedup in a single row on a special high-temperature pallet, slid into the oven, the oven closed, and thetemperature increased manually according to time-temperature scale. After cooling, a sample of fiveunits is drawn from a lot and strength-tested by breaking them in a special testing device. To beeffective in use, breaking strength must exceed 5 psi. If any item breaks at less than 5 psi, the lot fromwhich it came is scrapped. About 10% of the lots have been scrapped in recent times.a. A decision is made to run a process capability study. Data on the next 20 lots are tested using thesame procedure, and a sample sized of 5, and X-bar and R charts are drawn. At this point, ΣX = 112.00psi and ΣR = 23.26 psi. Calculate control limits for X and R for this process and estimate σb. Assuming a normal distribution of product, what proportion would you estimate does not meetspecifications?c.…
Are you an impulse shopper? A survey of 1000 grocery shoppers indicated that 24% of males and 57%of females make an impulse purchase every time they shop. Assume that the survey consisted of 500 males and 500 females. Complete parts (a) and (b) below. Question content area bottom Part 1 a. At the 0.01 level of significance, is there evidence of a difference in the proportion of males and females who make an impulse purchase every time they shop? Let group 1 be the males, and let group 2 be the females. State the null and alternative hypotheses. Choose the correct answer below. A. H0:π1≥π2 H1:π1<π2 BH0:π1≠π2 H1:π1=π2 C.H0:π1≤π2 H1:π1>π2 D.H0:π1=π2 H1:π1≠π2 E.H0:π1<π2 H1:π1≥π2 F.H0:π1>π2 H1:π1≤π2 Part 2 Calculate the test statistic. χ2STAT= (Round to three decimal places as needed.) Part 3 Determine the critical value. The critical value is - (Round to three decimal places as needed.) Part 4 State…
Ninety percent of the people who have a particular disease will have a positive result on a given diagnostic test. Ninety percent of the people who do not have the disease will have a negative on this test. If 7 percent of a certain populaton has the disease, what percent of that population would test positive for the diesase?
A electronics retailer list the sales (in thousands) of certain products in three cities for the prior quarter. During that period tablets sold for $241, laptops sold for $505, cell phones sold for $437, and DVR sold for $1,564. City 1 City 2 City 3 Tablets 4444 5757 3939 Laptop Computers 6464 7777 6868 Cell Phones 3131 5353 6969 Personal DVR 3030 7676 5454 City 1's total sales : City 2's total sales : City 3's total sales :
In 2016, Red Rose tea randomly began placing one of ten English porcelain miniature figurines in a l00-bag box of the tea, selecting from ten figurines in the American Heritage Series. (a) On the average, how many boxes of tea must be pur-chased by a customer to obtain a complete collection consisting of the ten different figurines? (b) If the customer uses one tea bag per day, how long can a customer expect to take, on the average, to obtain a complete collection?
Year Consumer price index 2001 0.9576707944 2001 1.043445267 2001 0.1314307172 2001 -0.2812675892 2002 0.3572771719 2002 1.086752857 2002 0.4263206673 2002 0.3137689184 2003 1.011959522 2003 0.364298725 2003 0.4900181488 2003 0.01806032147 2004 0.9028530155 2004 1.431639227 2004 0.352858151 2004 0.5977496484 2005 0.6291506466 2005 1.337269885 2005 1.216795201 2005 0.5079580088 2006 0.539083558 2006 1.692359249 2006 0.5602240896 2006 -0.8520399803 2007 1.019170385 2007 1.917329089 2007 0.2759287112 2007 1.711214555 2008 1.136773642 2008 2.195344656 2008 1.163055346 2008 -2.828529429 2009 -0.497633075 2009 1.060302337 2009 0.6790719816 2009 0.2011885888 2010 0.4014150536 2010 0.4750721517 2010 0.09325049836 2010 0.2949163207 2011 1.264822375 2011 1.743310892 2011 0.4085179843 2011 -0.1520557705 2012 0.7956386559 2012 0.8275317381 2012 0.219328148 2012 0.03604046954 2013 0.5903298758 2013…