Suppose that a market research analyst for a cell phone company conducts a study of their customers who exceeds the time allowance included on their basic cell phone contract. The analyst finds that for those people who exceed the time included in their basic contract, the excess time used follows an exponential distribution with a mean of 30 minutes. Consider a random sample of 65 customers who exceed the time allowance included in their basic cell phone contract. In an exponential distribution mean and standard deviation values are same. Find the probability that the mean excess time used by the 65 customers in the sample is longer than 28 minutes.

Q: The uniform distribution of a random variable X is given in the figure below. 0 2 1. X From the…

A:

Q: ing time of the necklace following the cooling process (30 minutes and 45 minutes). e for the…

A: *Answer:        A B C Samples Mean 1 A1 B1 C1 10.7 10.8 11.3 10.93333 2 A2 B1 C1 11.4 11.8…

Q: 4.6 4.6 4.4 4.5 4.3 4.7 4.9 4.6 4.6 4.6 4.5 4.7 4.5 4.5 4.6 4.6 4.6 4.8 1. Use the ungrouped data…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: a company manufactures a total of 8000 motorcycles a month in three plants A, B and C Of the 8000…

A: Let A1, A2, ... , An be n mutually exclusive and exhaustive events with P(Ai) > 0 for all i = 1,…

Q: The average score for games played in the NFL is 21.2 and the standard deviation is 9.3 points. 17…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: 6. c. Determine P(B1 and A2). (Round your answer to 2 decimal places.)

A: Required probability is P(A3)

Q: What is the expected average height of 8 year old boys, using the regression equation?

A: From the given information, the obtained regression equation is y=27.84+2.573x.

Q: construct a box-and-whisker-plot for the data values shown 4; 4; 4; 14; 29; 44; 49; 50; 60; 74;…

A:

Q: Consider the probability density function f(x) = 1.5x² for-1 ≤x≤ 1. What is P(x > 0)? a. 0 b. 0.125…

A: It is given that  The probability density function of continuous random variable X is  f(x) = 1.5x2,…

Q: The US Department of Energy reported that 52% of homes were heated by natural gas. A random sample…

A:

Q: State the null and alternative hypothesis. Describe the Type I and Type II errors. The average…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer  first…

Q: You are conducting a study to see if the accuracy rate for fingerprint identification is…

A: It is given that  The test statistic is z = 3.262 The given test is right-tailed test.

Q: A random sample of 28 MBAs working in New York revealed that their mean annual salary was $123,000.…

A: Solution-: n=28  ,x¯=123000 ,σ=22000  What is the point estimate (i.e. the "best guess") of the mean…

Q: Consider a drug testing company that provides a test for marijuana usage. Among 294 tested subjects,…

A: In the given scenario, the test results of marijuana usage were conducted. They found that 29 tests…

Q: Based on a survey, assume that 46% of consumers are comfortable having drones deliver their…

A: p  denotes sample proportion and q=1-p

Q: Let X1, X2,..., Xn ~ N(μ, 0²) independent random variables. Find the distribution X+X2+…+Xn X= = n…

A: Given Xi~N(μ, σ2) be the iid and i=1,2,...,n  Result: X and Y are independent then E(XY)=E(X)E(Y)…

Q: Q4// Evaluate the coefficient a, b from the below data using least square regression method, then…

A:

Q: Price of a particular commodity in five years in two cities are given below: Price in City A 20 22…

A: The question is about measures Given :

Q: Consider a test for the presence of heteroscedasticity using the specification estimated in (1)-(2).…

A: Given 3 options about the test for the presence of heteroscedasticity.

Q: Evaluate the following da √(x - X 1)(x-2)(x-3) integral

A:

Q: 2. Four basketball teams took a random sample of players to test how high each player can jump (in…

A: The following information has been given: Team 1 Team 2 Team 3 Team 4 36 32 48 38 42 35 50 44…

Q: What is the standard deviation of 1,1,1,2,3,3,

A: It is given that the sample 1,1,1,2,3,3,3

Q: The mean amount of time to build a store is 60 days. A claim is made that the mean amount of time…

A: The following information has been given: The population mean is μ=60. The sample mean is x¯=55. The…

Q: 1. The heights of the freshmen at STI College are supposed to follow a normal distribution with a μ…

A: It is given that  Sample mean = 160 Standard deviation = 10 Sample size = 36

Q: X₁, X2,...,xn is a random sample from the population that follows a Poisson distribution with the…

A: Given information: Given x1, x2, x3,................... xnis  a random sample from the population…

Q: A car battery manufacturer claims that its car batteries last at least 5 years on average, under…

A: Given, sample size (n) = 51 sample mean (x̄) = 4.89  standard deviation (σ) =  0.38  population mean…

Q: Prove. Let X₁, X₂,..., X be a r.s. from N(µ,σ²) and Y₁,Y,₂,...,Y, be another independent r.s. from…

A:

Q: 3.17 An average of five sequential 2-min counts of a constant source by Lab Group A gave a resulting…

A:

Q: X₁ + X₂ Q2: Let X₁-G(4,3) and X₂G(2,3) by mgf find dist. of Y=X₁ +X₂. ===

A:

Q: D5) Statistics and Probability A plant manager is considering investing in a new ​$40,000 machine.…

A: Given information: Investment amount = $40,000 Expected cash flow = $9,000 Actual cash…

Q: When taking a 19 question multiple choice test, where each question has 3 possible answers, it would…

A: Probability is the likelihood that an event would occur.

Q: CNNBC recently reported that the mean annual cost of auto insurance is 977 dollars. Assume the…

A: GivenMean(μ)=977standard deviation(σ)=252sample size(n)=36

Q: d. A researcher polls people as they walk by on the street. e. A survey assessing customer…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Determine whether the source given below has the potential to create a bias in a statistical study.…

A: According to the question, an animal rights foundation provides hundreds of thousands of dollars to…

Q: Assuming that AP Music Theory scores are approximately normally distributed, what score was at the…

A: here given  mean  =  2.99  standard deviation =  1.32

Q: Express the confidence interval 45.5% ±3.3% in the form of a trilinear inequality. % < p <

A: Given confidence interval is 45.5% ± 3.3%

Q: The diagram shows the results of four different experiments using a dartboard.  Which one is an…

A: Experiments

Q: If the average yield of a dunum of yellow corn is 800 kg, with a standard deviation of 40 kg, and…

A: Given that : X follow a normal distribution with mean (μ) 800 kg and standard deviation (? ) 40 kg.…

Q: The variable x is normally distributed with a mean of 500 and a standard deviation of 43. Find the…

A:

Q: n uses simple exponential smoothing with trend adjustment to forecast dema 0.4" and "=0.3". The…

A:

Q: n, how much did this particular home provider earn? Sh

A: here given , In a certain county, the average annual income for a home provider involved with an…

Q: 1.x = 50 μ=45o = 8 Find the area to the right. 2 x= 109 μ=116=2.7 Find the area to the left.…

A: 1. It is given that the mean is 45 and the standard deviation is 8.

Q: For a recent 10k run, the finishers are normally distributed with mean 63 minutes and standard…

A: Given problem is normal distribution Mean=μ=63 S.D.=σ=14 Let, X~N(μ=63,σ=14) Then Z=X-μσ follows…

Q: XP(Z P(Z) THEN 1.8626= (+P) - 0 < X<N. = TRUE O ERROR O

A: Solution

Q: 5. A teacher argues any relationship between student success and the level of class participation…

A:

Q: Here is a data set (n = 117) that has been sorted. 38.9 39.5 45.1 45.7 47.3 47.6 47.8 47.9 48.6 48.6…

A: Given n=117

Q: C. X is a normally distributed random variable with a mean of 57 and a standard deviation of 6. Find…

A: Given data : Population mean  = 57 Population standard deviation = 6

Q: Consider the given sample: 18, 12, 14, 15, 13, 14, 12, 17, 16, 15  SOLVE FOR: MEDIAN  MEDIAN…

A: Data given  18,12,14,15,13,14,12,17,16,15

Q: The amount of pollutants that are found in waterways near large cities is normally distributed with…

A: GivenMean(μ)=9.1standard deviation(σ)=1.7sample size(n)=35

Q: conducting a study to see if the probability negative a test for a certain cancer is significantly…

A: Given : You are conducting a study to see if the probability of a true negative on a test for a…