1. In a job fair, 3 000 applicants applied for a job. Their mean age was found to be 28 with a standard deviation of 4 years. 1.1 Draw a normal curve distribution showing the z-scores and the raw-scores. 1.2 How many applicants are below 20 years old? 1.3 How many have ages between 24 and 32 years? 1.4 How many applicants are above 32 years old? 1.5 Find the age such that 75% is below it.

Q: 3. We found the mean number of years of education is 13.05 with a standard deviation of 3.02 among a…

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

Q: 4. Consider that in a population of Filipino adults ages 18 to 65, Body Mass Index (BMI) is normally…

A: Given: X~N(μ,σ)μ=28σ=6

Q: 7.12 In 2009, the average charge for tax preparation by H&R Block, Inc. was $187. Assuming a normal…

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

Q: 6. The annual salaries of employees in a large company are approximately normally distributed with a…

A: Given: Mean, μ = 50000       Standard deviation, σ=20000      Let X denote the 85th percentile…

Q: In a recent year, the ACT scores for high school students with a 3.50 to 4.00 grade point average…

A: The mean is 25.7 and the standard deviation is 3.3.

Q: 4. Given a distribution with a mean of 60 and standard deviation of 21, find a value with a z-score…

A: Suppose X be the random variable which follows Normal distribution with mean μ=60 and the standard…

Q: 17) The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest,…

A: Note: Hi there! Thank you for posting the question. As there are several independent questions,…

Q: 2) The annual salaries of employees in a large company are approximately normally distributed with a…

A: Obtain the percent of people earn less than $40,000. The percent of people earn less than $40,000 is…

Q: The following are the average grade of 20 students: 1. What is the mean, variance and standard…

A: As per our guidelines we are suppose to answer only three subparts Given data is…

Q: The placement test for a college has scores that are normally distributed with a mean of 400 and a…

A: Solution: Let X be the placement for a college has scores are normally distributed with mean μ=400…

Q: 1. The scores on a test have a mean of 100 and a standard deviation of 15. If a personnel manager…

A: Formula : Z =(X - μ)/σ

Q: 1) A. C. Neilsen reported that children between the ages of 2 and 5 watch an average of 25 hours of…

A: 1) The mean is 25 and the standard deviation is 3.

Q: The scores on a standardized mathematics test for 8th grade children in New York State from a normal…

A: Solution: Let X be the score on a standardized mathematics test for 8th grade children in New york.…

Q: 1. Consider the normal distribution of IQs with a mean of 100 and a standard deviation of 16. What…

A: Note: As per guidelines we are supposed to solve only 1 question at a time. Please repost the other…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Introduction:The sampling distribution of the sample mean, X̅ for a large sample (n ≥ 30) is…

Q: 2. Information from the Department of Motor Vehicles indicates that the average age of licensed…

A:

Q: Suppose the people living in a city have a mean score of 35 and a standard deviation of 10 on a…

A: Heh there! Thanks for posting the question. Your question has more than three sub-parts. However, we…

Q: 1) On the assumption that IQ's are normally distributed in the population with a mean of 100 and a…

A: Given that, μ=100,σ=15 (a) The percentage of population has an IQ 135 is,

Q: 1. For each day of last year, the number of vehicles passing through a certain intersection was…

A:

Q: 1. Ninety-five percent of all cultivated strawberry plants grow to a mean height of 11.4 cm with a…

A:

Q: 1. The Prior to medical visits, patients are asked to complete a self-administered medical history…

A:

Q: 1. An industrial company claims that the mean pH level of the water in a nearby river is 6.8. You…

A: From the provided information, The hypotheses can be constructed as: H0: µ = 6.8 Ha: µ ≠ 6.8 Level…

Q: Suppose that quiz scores in a beginning statistics class have a mean of 6.56.5 with a standard…

A: The Chebyshev's theorem states that at least 1-1k2 of the observations falls within k standard…

Q: 3. The amount dispensed by the coffee machine follow the normal distribution with a mean of 5,286…

A:

Q: 4-A health maintenance organization (HMO) wants to estimate the mean length of a hospital stay. How…

A: The random variable length of a hospital stay follows normal distribution. The margin of error is…

Q: 1. a) Sketch a normal distribution/bell curve with a mean of 60 and a standard deviation of 20. 20…

A: Here given mean 60 and standard deviation 20

Q: 3.) The monthly incomes of teachers in a public school are normally distributed with a mean of…

A:

Q: In a reaction between an aqueous solution of AgNO3 + NaCl, the following percentages of chloride…

A: Given information- We have given the percentages of chloride found in aqueous solution. 32.52%,…

Q: 2. Suppose that in an examination, the cut-off score for passing is 75 for 200 persons. If the mean…

A: Given that, Suppose that in an examination, the cut-off score for passing is 75 for 200 persons. If…

Q: a) Between what two values would you expect to find about 95% of the lead actresses ages, based on…

A: Given, Meanμ= 29.6 Standard deviationσ = 6.4 Let popular actress Reese Witherspoon's age be x x = 36…

Q: 4) Suppose that the average credit card debt among households in state A is $8400. The department of…

A: Given, average credit card debt among households in state A is $8400.

Q: 4. A recent study stated that if a person smoked, the average of the number of cigarettes he or she…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 1414 Population Standard Deviation…

Q: 1. Assume the speed of vehicles along an open stretch of a certain highway in Texas that is not…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: 10) The weights of a large population of male students have a mean of 160 pounds with a standard…

A: Solution

Q: 2. Suppose golfer Michelle Wie has an average driving distance of 269.1 yards, with a standard…

A: X~N( μ = 269.1  , ? = 13.8) μ = 269.1 , ? = 13.8 Z-score =( x - μ )/? Note: According to bartleby…

Q: A chemical engineer desiring to study the evaporation rate of water from brine evaporation beds…

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

Q: The Energy Information Administration reported that the mean retail price per gallon of regular…

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

Q: For a population with mean 80 and standard deviation 10, what is the X value corresponding to z =…

A:

Q: In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national…

A: Given that, μ=63.80,s=2.66, M = 62.60 and n=25 The  effect size Cohen’s d is, The  effect size…

Q: - If a population with µ =72 and o = 8, the distribution of z-scores will have a mean and standard…

A: Given: Mean = µ = 72 Standard deviation = σ = 8

Q: In your school with 400 Grade 11 students, the final examination in General Mathematics has a mean…

A: From the provided information, Mean (µ) = 38 Standard deviation (σ) = 4 X~N (38, 4) Here X be a…

Q: (O) What is the standard deviation of a distribution that has a mean of 46.2 if a PERFORMANCE value…

A: From the provided information, Mean (µ) = 46.2 Performance value (x) = 28 Z score = -1.24

Q: Suppose IQ scores are approximately normally distributed with a mean  of 100 and a standard…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15 Let X be a random variable…

Q: # 6- A set of data items is normally distributed with a mean of 90 and a standard deviation of 5.…

A:

Q: The average undergraduate cost for tuition, fees, and room and board for two-year institutions last…

A: Given, n =  μ = 13252x¯ = 15560s = 3500α = 0.01

Q: 1. For each day of last year, the number of vehicles passing through a certain intersection was…

A:

Q: 3- At a computer manufacturing company, the actual size of a particular type of computer chips is…

A: We have to find required sample mean.

Q: 2. A machine produces electrical components. 99.7% of the components have lengths between 1.176 cm…

A: A machine produces electrical components. 99.7% of the components have lengths between 1.176 cm and…

Q: 16. Suppose that the vehicle speeds at an interstate location have a normal distribution with a mean…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: 2. The following frequency distribution gives the age distribution of drivers who were at fault in…

A:

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.