Wendy's restaurant has been recognized for having the fastest average service time among fast food restaurants. In a benchmark study, Wendy's average service time of 2.2 minutes was less than those of Burger King, Chick-fil-A, Krystal, McDonald's, Taco Bell, and Taco John's (QSR Magazine website, December 2014). Assume that the service time for Wendy's has an exponential distribution. 1.  Suppose a manager of a Wendy's is considering instituting a policy such that if the time it takes to serve you exceeds five minutes, your food is free. What is the probability that you will get your food for free (to 4 decimals)?

Q: A dietician conducted a study to compare calories (x) and fat (y) in 18 of the most popular…

A: Given: n=18∑ x= 6950∑y=383∑ x2=3126300∑ y2=10885∑xy=168490 The values of x and y

Q: The following data has been collected on the number of customers seen to arrive to a doctor’s office…

A: The squared coefficient of variation is as follows: CV2 = (SD/mean)^2         =(1.26/2.8)^2…

Q: Below is a scatter plot with both a linear model and an exponential model for another group's data…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: To test whether the mean time needed to mix a batch of material is the same for machines produced by…

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

Q: The following data represent the monthly phone​ use, in​ minutes, of a customer enrolled in a fraud…

A: Given that the data represents the the monthly phone​ use, in​ minutes, of a customer enrolled in a…

Q: The following table gives the quarterly sales of the Coca-Cola Company. What is a moving average…

A: Moving average method is a time series analysis method in which data points are analyzed by taking…

Q: Suppose an Internet retailer would like to investigate the linear relationship between the amount of…

A:

Q: For a moderately skewed distribution of supply of Product A, arithmetic mean is 100, and coefficient…

A:

Q: Here is a data set that has a nearly normal distribution. data data data data 70.72 59.02…

A: Given data

Q: The following table shows the number of automobile crashes in Durham county by year 2016 2017 2011…

A: y = m*x+b Here ,n=10,  ∑x=20125 , ∑y=84982, ∑xy=171055545,∑x2=40501645,∑y2=734303418…

Q: The following data gives the monthly income (in thousand of rupees) of female and male urses of a…

A: From the given data we the average incomes of males and females as S.No.  Female Male 1 46 34…

Q: The hospital wants to know if their budget is sufficient by checking whether the above frequencies…

A: Test is that whether the given frequencies fit the data from their records.

Q: The following table represents the highest educational attainment of all ad

A: Given, The table which represents the highest educational attainment of all adult in a certain tow.…

Q: Two formulations of a certain coating, designed to inhibit corrosion, are being tested. For each of…

A: State the test hypotheses.

Q: Calculate co-efficient of concurrent deviation from the data given below: No. of employees : 250 300…

A:

Q: A group of athletes has the following heights in inches. Height in Inches: 66 72 78 68 73 72 70 69…

A: Given : Sample No. Sample  1 66 2 72 3 78 4 68 5 73 6 72 7 70 8 69 9 66 10 72…

Q: Below are given the annual production (in '000 Rs.) of a fertiliser factory : 1998 100 1997 Year :…

A:

Q: The owner of a cell phone store at Greenhill’s Shopping Center was not happy when he learned that…

A: Here, µ is the true mean number of cell phones sold daily. Null hypothesis, H0: µ=8 Alternative…

Q: The following table shows the distribution of the number of televisions per household for residents…

A:

Q: The following data show the yearly salaries of football coaches at some state supported universites…

A: Given yearly salary of football coaches at some universities,  State salary(x)  A 53 B 44 C…

Q: The following data gives the number of battery sales by one of the leading automobi company over the…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Delta Airlines quotes a flight time of 2 hours, 5 minutes for its flights from Cincinnati to Tampa.…

A: Given data Delta airlines quotes a flight time of 2 hours, 5 mins for its flights from Cincinnati to…

Q: Assume the temperature inside a growth chamber fluctuates randomly, and you would like to estimate…

A: Given data, 69.6,59.5,76.1,71.4,64.8,62.5,79.6,71.5,64.3   Sample mean is =∑xn=619.39=68.81 Sample…

Q: To test whether the mean time needed to mix a batch of material is the same for machines produced by…

A: Since there is multiple questions, part a is answered step by step. Kindly repost or more help .

Q: Suppose a study of speeding violations and drivers who use cell phones produced the following data:…

A: speeding violation no speeding violation total use cell phone 50 295 345 not use cell phone 60…

Q: he table below shows the average annual tuition and fees at private and public 4-year colleges and…

A: a) The linear regression line can be obtained using excels steps as follow: Enter the data into…

Q: The number of calories in a 12-ounce serving of randomly-selected regular and lite beers is listed.…

A:

Q: Choose the best graphical presentation and justify your Based on your answer in (1), construct the…

A:

Q: A sample of 60 students at De Anza College was taken to estimate the average number of sodas…

A: Given A sample of 60 students at De Anza College was taken to estimate the average number of sodas…

Q: To test whether the mean time needed to mix a batch of material is the same for machines produced by…

A: (a)

Q: The number of days travelers purchase their airline tickets ahead of their flights can be modeled by…

A:

Q: Show first the Mean, Median and Mode using Frequency Distribution. Solve for Q, P88, D10, Variance,…

A: From the provided , following table is constructed :  Frequency : It is the number of times a value…

Q: Studies have shown that the frequency with which shoppers browse Internet retailers is related to…

A: Note: As per our company guidelines, we are supposed to answer only the first three subparts of the…

Q: purchase appears to be relatively constant over time. In 2015, among a sample of 389 on-line buyers,…

A: From the available information, Let x1 denote the number of online buyers purchased merchandise in…

Q: Two formulations of a certain coating, designed to inhibit corrosion, are being tested. For each of…

A: Given: n=8

Q: Here is a data set that has a nearly normal distribution. data data data data 42.33 43.81 33.19|…

A: Let's check how many values lie in the interval of [60 , 65) => we should include 60 and exclude…

Q: (fo-fe) Fill in the missing values in the table. Round your responses for the expected frequencies…

A: Does it seem to you that people tend to be absent more on some days of the week than on others First…

Q: if its 80th percentile is the value 160, what is the value that corresponds to its 20th percentile

A: Given, Mean, μ = 140 80th percentile is the value 160. x = 160

Q: Here is a data set that has a nearly normal distribution. data data data data 45.5 51.33…

A: The provided data set has a nearly normal distribution. It is decided that each class will include…

Q: Here is a data set that has a nearly normal distribution. data data data data 47.45 55.8 51.82…

A:

Q: A manager is interested in determining if the population standard

A: From the given information, The sample size is n=20 Given significance level is 0.05. Degrees of…

Q: State whether you would expect this distribution to be symmetric, left-skewed, orright-skewed, and…

A: For symmetric, left skewed and right skewed distributions the tails of the distribution elongated…

Q: The U.S Energy Information Administration publishes data on residential consumption and expenditures…

A: To testH0:μ1-μ2=0H1:μ1-μ2≠0

Q: Find the weighted average of a data set where 20 has a weight of 3, 30 has a weight of 2, and 50 has…

A: The weighted average of the data can be obtained using the formula as:

Q: A bank is trying to determine how much a particular contractor makes on each job that he works to…

A: Given data: 3200, 4200, 5000, 6700, 7000, 7500, 8200, 58500

Q: The Credit Risk Department of a major bank estimates the default rate on loans under $10,000 to be…

A: Given: Population proportion (p) = 4% = 0.04 Number of loans that will be made (n) = 2400

Q: 110 100 90 80 70 60 50 40 30 20 10 Eunuch Mok Shin Seo Male group What type of graph is this? The…

A: Given problem Given that   What type of graph is this ? These are box plots. Plots to display the…

Q: Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales.…

A: To find: The mean of the matched-pair differences

Q: Find the weighted average of a data set where 10 has a weight of 2, 20 has a weight of 3, and 30 has…

A: given that weighted average of a data set where 10 has a weight of 2, 20 has a weight of 3, and 30…

Continuous Probability Distributions

Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.

Normal Distribution

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!