Speedy Oil provides a single-server automobile oil change and lubrication service.Customers arrive at a rate of 2.5 cars per hour (assume Poisson arrival rate). On averagethe shop can process a car in 12 minutes (assume exponential service rates).a.) What is the average number of cars in the system?b.) What is the average time a car spends waiting for service to begin?c.) What is the average time a car spends in the system?d.) What is the probability an arriving car has to wait for service?e.) What percentage of time are there 2 or fewer cars in the system?

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Answered: Speedy Oil provides a single-server…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A plumber has recorded the unit price and quantities sold of three models of the sinks for 2018 and 2019. In 2018 Model A: sold for R 250 with 10 units Model B: sold for R 350 with 20 units Model C: sold for R 450 with 25 units In 2019 Model A: sold for R 200 with 15 units Model B: sold for R 400 with 30 units Model C: sold for R 300 with 20 units Calculate the composite quantity index for 2019 with 2018 as the base period (Give your answer in percentage format (do not include % sign) and Round off your final answer to 1 decimal places) (1) The Lasperyres weighted aggregate (2) The Paasche weighted aggregate method
A regional package delivery company is considering changing from full-size vans to minivans. The company sampled 3 minivans from each of three manufacturers. Each minivan was driven for 5,000 miles, and the operating cost per mile was computed. The operating costs, in cents per mile, for the 9 minivans are provided in the table below: Manufacturer 1 Manufacturer 2 Manufacturer 3 15 11 14 14 13 16 13 12 15 Compute SST, SSE, and SS total and complete the ANOVA table. Source of Variation Sum of Squares df Mean Sum of Squares F Treatment Error Total State the null hypothesis : (Choose 1 or 2) The treatment means are the same The treatment means are different State the alternative hypothesisl hypothesis : (Choose 1 or 2) The treatment means are the same The treatment means are different d. What is the decision rule? Reject Ho if F is greater than e. What is your decision…
Draw the histogram for the 50 students in a class whose heights (in cms) are given
B4. A company has collected and smoothened its historcal yearly sales data of a product from 2015 up to 2021. The following table shows the sales and moving average figures. Year Sales Three-year moving average Five-ycar moving average (S thousands) 2015 2016 326.0 324.0 E 367.4 2017 344.0 2018 383.0 371.0 E 2019 389.0 2020 398.0 D. 2021 428.0 Calculate the missing values of 4, B, C, D, E and F(Correct to I decimal place).
The cholesterol levels (in milligrams per deciliter) of 30 adults are listed below. Find the interquartile range for the cholesterol level of the 30 adults. 172 180 184 185 154 156 165 165 170 171 189 189 190 192 195 198 198 200 200 200 205 205 211 215 220 220 225 238 255 265 OA. 180 B. 30 O O O C. 31 O D. 211
5
Q. 18. Calculate mode from the following 15 observations : 5, 4, 8, 7, 12, 18, 17, 30, 8, 12, 20, 12, 25, 30, 12.
5 and 6. The following data was collected from 1 bag of Hershey Kisses®. Each Kiss® was weighed in grams with the wrapper and recorded in the table below. Hershey claims that there are 368 grams of chocolate in one bag. Hershey Kiss Weights in Grams 4.76 4.72 4.74 4.55 4.91 4.74 4.78 4.71 4.80 4.78 4.78 4.75 4.79 4.82 4.91 4.83 4.68 4.74 4.70 4.80 4.70 4.76 4.70 4.83 4.93 4.74 4.84 4.82 4.76 4.77 4.72 4.78 4.83 4.75 4.74 4.68 4.84 4.71 4.71 4.76 4.66 4.78 4.73 4.74 4.92 4.77 4.80 4.79 4.86 4.64 4.78 4.70 4.75 4.78 4.76 4.83 4.66 4.77 4.83 4.78 4.69 4.81 4.68 4.78 4.88 4.72 4.85 4.85 4.81 4.74 4.80 4.82 4.84 4.70 4.85 4.70 4.81 4.72 4.79 4.73 4.61 Based on Hershey's® claim for 368 total net grams of chocolate in the bag, approximately how many Kisses® too many or too few are there? Assume that the Kisses® were weighed with the wrapper, each wrapper weighs 0.12 grams, and the net grams listed on the bag are for the chocolate only. Give some possible…
sub-parts to be solved.
1) Half of 7 pairs of calves consisting of identical twins drank milk for 3 months and the other half for 4 months. The 6-month weights of the calves are given below. Milk drinking time differs according to 6- month weight. Has it made an impact? (a=0.05) 3 mounth 86 92 102 96 83 89 78 4 mounth 90 96 100 106 95 87 90
2) a, b, and c. Solve them step by step.
A researcher thinks some social media sites are more prone to narcissistic behavior (excessive posting) than others. To examine the relationship between narcissism and social media, she recruits users of three different social media sites (Facebook, Twitter and Instagram), follows them for 24 hours and records the number of posts made by each user. The number of posts is given in the table below. Twitter Facebook Instagram 10 7 14 10 8. 10 10 10 11 9. www. 12 wwww. 11 13 12 8. 7 8. 11 8 10 12 11 11 a. Perform a complete hypothesis test to determine whether there are any significant differences among the three groups. Test at the .05 level of significance. SHOW ALL YOUR WORK b. Do you need to perform post hocs? Explain but do not compute the post hocs. C. Compute effect size. d. Summarize your findings in a source table. e. Write an interpretation of our results in APA-format (include means and SDs in your interpretation)

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