As a part of the productivity assessment at a company, the HR manager carried out a survey and found that inclusive of overtime, the amount of time spent at work per week follows a normal distribution with µ=35 hours and σ2  = 4 hours.

Q: At a large publishing company, the mean age of proofreaders is 36.2 years, and the standard…

A: Given Data, μ = 36.2σ = 3.7

Q: The actual weight of a bag of flour is modeled as a normal random variable with a mean of 0.25…

A: Given,   Mean = 0.25 Standard deviation = 0.02

Q: A quality control inspector routinely takes random samples of 200 cans of fruit cocktail produced in…

A: The approximate distribution of the sample proportion is given as a normal distribution given as:…

Q: As a part of the productivity assessment at a company, the HR manager carried out a survey and found…

A: Normal distribution is a continuous distribution which has many real world applications. A standard…

Q: A university pays an average of Php 425.00 per hour of work to their faculty members, with a…

A: As per guideline expert have to answer 3 subparts only please upload other parts separetly to…

Q: a. Samples consisting of a fixed number of articles are taken periodically from the continuous…

A:

Q: Suppose the mean number of people attending all 2017 Veterans Day celebrations held in Virginia is…

A: The question is about sampling dist. Given : Popl. mean no. of people attending all 2017 Veterans…

Q: a)The height of travellers were normally distributed about a mean of 160cm and a standard deviation…

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

Q: When students use the bus from their dorms, they have an average commute time of 8.832 minutes with…

A: Average Commute time of bus ,X= 8.832 minutes Standard deviation,σ = 4.2135 minutes and the commute…

Q: e, the normal distribution is used to approximate the sampling distribution of the sample proportion…

A: The sampling distribution of the sample proportion is approximately normal with at least 10 expected…

Q: The distribution of heights of a certain breed of terrier dogs has a mean height of 70 cm and…

A: Given X1-bar=70 X1-bar=30 S1=8 S2=5 n1=60 n2=80

Q: ounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a mean of…

A: (a) Given: μ=25, σ=7 The corresponding z-value needed to be computed:  The probability that a…

Q: ach month, the city of Accra generates an average of 28 pounds of waste. Assume the variable is…

A: To the probability of its generating between 27 and 31 pounds of waste per month and draw a normal…

Q: company claims that 80% of all emails from custumers are responden within 24 hours of being…

A: According to guidelines we solve first three subparts when given multiple subparts

Q: Calculate the mean and variance of this distribution using the MGF obtained in (a).

A:

Q: (When your trying to study lol) Parker's pavers has determined that a paver measuring 5 inches long…

A: From the provided information, A paver measuring 5 inches long has a z score of +1 and a paver…

Q: Each month, the city of Accra generates an average of 28 pounds of waste. Assume the variable is…

A: Note: We will answer the first question only as the exact one is not specified. Please resubmit the…

Q: In a certain city, the number of potholes on a major street follows a Poisson distribution with a…

A: Given data: In a certain city, the number of potholes on a major street follows a Poisson…

Q: Each of two pesticide brands is applied to 100 containers of fire ants. Brand1 killed all ants in 65…

A: Assumptions:Each brand is independent of other.The sample size of each brand is large.The samples…

Q: Each month, a public market in Batangas generates an average of 30 pounds of plastic for garbage or…

A: Mean(µ) = 30Standard deviations (σ) = 4X ~ N (µ, σ )= N (30, 4)

Q: A manufacturer of motorcycle batteries guarantees that the batteries will last, on average, 3 years…

A: Suppose a random sample drawn from the normal population with variance σ2, then check for the…

Q: A study shows in a certain school that the average number of hours a student answers his/her module…

A: GivenMean(μ)=26.8standard deviation(σ)=5.57No.of students = 2780

Q: The GPAs of all 5540 students enrolled at a university have an approximately normal distribution…

A: The sampling distribution is the representation of all possible samples drawn from the large…

Q: Rods are taken from a bin in which the mean diameter is 8.30 mm and the standard deviation is 0.40…

A: Consider X denoting the bin from which rods are taken, and Y denotes the bearings. It is given that…

Q: Each of two pesticide brands is applied to 100 containers of fire ants. Brand1 killed all ants in 65…

A: The test for two proportions to compare the two brands using MINITAB software is given…

Q: A person read that the average number of hours an adult sleeps on Friday night to Saturday morning…

A: test statistic=t=X¯-μs/nX¯=7.7, s=1.3, n=14, tcritical=tα,n-1= 1.7709 one-tailed  test

Q: The number of customers arriving at a teller’s window at Commercial Bank is Poisson distributed with…

A: Givenmean rate as 2 persons per minute.Time between 10-30 am to 10-35 am is 5 minute. The rate for 5…

Q: typical bag of rice weighs 67.5 pounds. A consumer suspects and claims that the mean weight of all…

A: Given : Claim : The mean weight of all bags of rice sold in a local public market is less than the…

Q: (b) The delivery times for all food orders at a fast-food restaurant during the lunch hour are…

A: Given,sample size(n)=16mean(μ)=6.7standard deviation(σ)=2.1

Q: A real estate agent believes that the value of houses in the neighborhood she works in has increased…

A: It is given that the alterative hypothesis is as follows: Ha : µd > 0, the t test statistic is…

Q: The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National…

A: Let  x1 be a random variable that represents the time interval (in minutes) between Old Faithful…

Q: The number of accidents in a year attributed to taxi drivers in a city follows Poisson distribution…

A:

Q: To avoid having her hours cut back at work, Bridgett must avoid performing in the lowest 40% of the…

A: Given that, Typical amount of items manufactured at Bridgett's job form a normal distribution with µ…

Q: Suppose a sample of O-rings was obtained and the wall thickness (in inches) of each was recorded.…

A: First we have sorted the data in ascending order along with their corresponding index i  i…

Q: Given that the vaue of a ægment of a roadway is 720 veh/hr where arrival of vehicles is a poisson…

A: Given that: no of vachiles on roadway = 720/hr  A) calculate no of headway in 5sec ?  Total vachiles…

Q: A study was done on body temperatures of men and women. The results are shown in the table. Assume…

A: Statistical Software Output:

Q: In a certain county, the average annual income for a home provider involved with an online rental…

A:

Q: A person read that the average number of hours an adult sleeps on Friday night to Saturday morning…

A: Given Population mean, μ=7.4 Sample Size, n=16 Sample mean, X=6.2 Sample sd, s=1.1 α=0.05

Q: The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National…

A:

Q: The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a…

A:

Q: The production of AN screws states that the mean length for AN screws is 3.2 cm. Also, it is known…

A: The probability of a randomly selected AN screw would measure more than 3.8 cm is p.

Q: Suppose that the fraction of defective modems shipped by a data-communications vendor has an…

A: Given, a=5 b=21 a) The mean and variance of the fraction of defective modems per shipment are…

Q: In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were…

A:

Q: The standard deviation for the mmber of pages in a pdf document having a discrete uniform…

A: We need to find the standard deviation for the number of pages in a pdf document having a discrete…

Q: A university pays an average of Php 425.00 per hour of work to their faculty members, with a…

A: Thank you for posting the question. As your question has more than 3 parts, as per the policy, we…

Q: An automobile insurer has found that repair claims are Normally distributed with a mean of $510 and…

A:

Q: A bartender calculates that every night she works, she has a 60% chance of earning more than $275 in…

A: Given: A bartender chances of earning more than $275 in tips is 60%, that is, p = 0.6. Number of…

Q: Each of two pesticide brands is applied to 100 containers of fire ants. Brand1 killed all ants in 65…

A: Given, Brand 1 killed 65 of 100 => P1^ = 65/100 = 0.65 Brand 2 killed 58 of 100 => p2^ =…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.