using the 68-95-99.7 rule what is the aproximate percentage of lightbulb replacement requests numbering between 51 and 84?

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

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Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: The provided information are: Population mean (µ) = 61 Population standard deviation (σ) = 10

Q: Do married and unmarried women spend the same amount of time per week using Facebook? A random…

A: We have given that  Sample size n1 = 45 , n2 = 39 Sample mean xbar1= 3.0 , xbar2 = 3.4 Sigma1 = 1.2…

Q: YodelAir operates a charter jet service out of an airport in a secluded mountain ski resort. The…

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Q: A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences…

A: The P-Value is .076574.The result is significant at p < 0.10.

Q: The maintenance department at the main campus of a large state university receives daily requests to…

A: Let "X" be the number of lightbulb replacement daily requests According to the empirical rule…

Q: An accounting firm is planning for the next tax preparation season. From last year's returns, the…

A: We have to find out given standard error of mean...

Q: Ecobank Ethiopia issues its own credit card. The credit manager, Gloria wants to find whether the…

A:

Q: A manufacturer of potato chips would like to know whether its bag filling machine works correctly at…

A: Given information- Significance level, α = 0.02 Population mean, μ = 406 grams Sample size, n = 40…

Q: Full-time college students report spending a mean of 23 hours per week on academic​ activities, both…

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Q: B. In a time and motion study, it was found that the average time required by workers to complete a…

A: Hypothesis testing is the important concept of statistics. A statistical hypothesis is a statement…

Q: In a plant lengths of seedlings in a box sprayed with a new kind of fertilizer has an average height…

A: The summary of statistics is, x¯=20,σ=10,n=80 The null and alternative hypothesis is, The type of…

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Solution-: Let, X- be the number of daily requests  of lightbulb replacement Given: We find, the…

Q: 1) According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in…

A: Since you have asked multiple questions, we will solve the first question for you. If you want a…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: Obtain the approximate percentage of cars that remain in service between 35 and 40 months. The…

Q: A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: statues, their weights are normally distributed. Suppose 99.7% of the time, the statues weigh…

A: From the given information we find the mean and SD.

Q: 1. According to the school librarian, the average number of pages of books in the reference section…

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

Q: 17. A machine fills bottles with cola. The mean fill is 341 mL with a standard deviation of 2 mL.…

A: Answer:17- Given mean μ = 341 ml   and a standard deviation σ = 2 ml                    The…

Q: 3. Boston Marathon: A sports statistician claims that the mean winning times for Boston Marathon…

A: Let μ be the mean winning times for Boston Marathon women’s open division champions     To check :…

Q: Due to random variations in the operation of an automatic coffee machine, not every cop is filled…

A: Mean (μ)=9 Standard deviation (σ)=0.6

Q: A study tracked walking habits of 1136 randomly selected adults in the United States. The study…

A:

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: In the question we have to find approximate percentage of cars.

Q: Assume that the traffic to the web site of Smiley’s People, Inc., which sells customized T-shirts,…

A: Given  Mean=mu=4.44 million=4.44×1000000=4440000 Standard deviation=sigma=720000…

Q: Full-time college students report spending a mean of 31 hours per week on academic​ activities, both…

A: Let us denote X=The number of hours spent by a full-time college student per week on academic​…

Q: A. The owner of a computer repair shop has determined that his daily revenue has a mean of $7000 and…

A: Note: Hey there! Thank you for the question. As you have posted multiple questions together, as per…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: Solution: Let X be the number of months in service for the fleet of cars. From the given…

Q: Among US Households, only 15% have a landline phone.  A telemarketing campaign will involve a SRS of…

A: Given data, p=15%=0.15 n=2250 standard deviation of X=?

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A:

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Mean= 52 sigma = 3

Q: viation of 100. These scores are close to being normally distributed. An exclusive club wishes to…

A: Given: Population mean μ=500  Population standard deviation σ=100 Let X be as N(500, 1002)

Q: The time spent by a teacher at work in the holidays is normally distributed with a mean of 20 hours…

A: Given: mean μ= 20 Standard deviation σ=5 Concept: Here we shall use z score formula, z=x-μσ

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: The 68-95-99.7 rule for a bell-shaped distribution states that  68% of the population is found…

Q: The maintenance department at the main campus of a large state university receives daily requests to…

A: Given : The dist. of the no. of daily requests is bell-shaped with Mean (µ)=58 Standard deviation…

Q: A researcher was testing the number of pop corn kernels that popped out of a mini bag of 100 kernels…

A: Given a researcher was testing the number of pop corn kernels that popped out of a mini bag of 100…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A:

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A:

Q: tour guide company is trying to decide if it is going to increase the cost of its tours to cover its…

A: μ=$​ 58 σ=$​ 18 n= 36

Q: A lumber company is making boards that are 2568.0 millimeters tall. If the boards are too long they…

A:

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Suppose a random variable X defines the number of daily lightbulb replacement requests.

Q: The maintenance department at the main campus of a large state university receives daily requests to…

A: Given Information: Mean (u) = 41  Standard deviation (s) = 4

Q: The amount of time spent in prison has a mean of 5.2 years and a standard deviation of 1.3 years. A…

A: Given: Population mean μ = 5.2 years Population standard deviation σ = 1.3 years n = 16 Significance…

Q: A company has a policy of retiring company cars.This policy looks at a number of miles driven,…

A:

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Empirical rule: According to empirical rule, 99.7% of data lies within three standard deviations of…

Q: e maintenance department at the main campus of a large state university receives daily requests to…

A: Let X represent the random variable   Mean=59 SD=5

Q: Tallest and Shortest Men The tallest living man at the time of this writing is Sultan Kosen, who has…

A: Given dataHeight of tallest living man Sultan Kosen = 251 cmHeight of shortest living man Chandra…

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A:

Q: Derby Leicester is a city planner preparing for a meeting with the mayor. He would like to show that…

A: It is given that the sample mean are 50.91 and 59.27, and the population standard deviations are…

Q: A certain website claims that Indian worker spends an average of 2117 hours per year. Assume the…

A: # X be the no of hour spend by Indian worker follow normal distribution with mean mu=2117 and sd=250…