21 A normal distribution has mean 5 and standard deviation 3. What IS the probability that the deviation from the mean of an item taken at random will have a negative value.

Q: 11. In a normal distribution, approximately 95% of the data are contained within one standard…

A: 11. Empirical Rule: 68% of the values lies between one standard deviation from the mean. 95% of the…

Q: 4. A variable follows the triangular distribution and has the lower limit of 600, an upper limit of…

A: A distribution is called triangular if the shaped of the distribution curve is triangular. This…

Q: Harrisburg International Airport records daily weather data. Upon analyzing the average high…

A: GivenMean(μ)=41.1standard deviation(σ)=5.0

Q: The monthly incomes of an organization follows a normal probability distribution with a mean of…

A: From the provided information, Mean (µ) = $5,000 Standard deviation (σ) = $100 Let X be a random…

Q: 5. The Weschler Adult Intelligence Test Scale is composed of a number of subtests. On one subtest,…

A:

Q: 3. The weight of house cats is normally distributed with a mean weight of 13 pounds and a standard…

A: Given : μ = 13 σ = 2.9 Let the weight of house cats be X. X ~ Normal(μ = 13, σ = 2.9)

Q: The average number of pushups a United States Marine does daily is 300, with a standard deviation of…

A: We have given that  The average number of pushups a United States Marine does daily is 300, with a…

Q: 49. The price of an egg (in BDT) is normally distributed with mean 10 and standard deviation 1. What…

A: Given : Mean , μ = 10Standard deviation, σ = 1 Here, we have to calculate the probability that the…

Q: 3. Information from the American Institute of Insurance indicates the mean amount of life insurance…

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

Q: 25. The distribution of total body protein in healthy adult men is approximately Normal, with mean…

A: Given data: Mean = 12.3 kg Population standard deviation  = 0.1 kg  ~ Normal distribution

Q: According to a Survey, households in the city X spend an average of $24 per week on their leisure…

A: Probability distribution : A probability distribution is a statistical function that describes all…

Q: The selling prices of various homes in a community that follow the normal distribution with mean =…

A:

Q: 2. A sample of size 20 will be drawn from a population with mean 6 and standard deviation 3. a. Is…

A: Given Datan = 20mean = 6standard Deviation = 3

Q: 30% of a compnanies clients are in south africa.  a sample of 130 is randoms selected  what is the…

A:

Q: 4.According to the children’s growth chart that doctors use as a reference, the heights of…

A: Given,mean(μ)=85standard deviation(σ)=5

Q: nsurance claim amounts follow a normal distribution with a mean of $800 and a known standard…

A: From the given information, mean (μ) =$800 and standard deviation (σ) =$300And also sample size (n)…

Q: 4. A standard normal curve is a normal probability distribution that has a mean of one and standard…

A: 4. Answer: False

Q: 23. The table at the top of the page lists the means and standard deviations of several different…

A: Part 1: We have, μ = 14, σ = 5 Thus, P(Y<9)=PY-μσ<9-145           =P(Z<-1)…

Q: A random variable, x, has a normal distribution with μ = 13.6 and σ = 2.90, what is the value for x…

A:

Q: 5. The average American adult eats an average of 6.5 gallons of ice cream per year. Assume the…

A: (5) X follows a Normal distribution with mean = 6.5 and S.D = 2.3 Then z=(x-mean)/SD =…

Q: 1. A normal distribution has a mean of 54 and a standard deviation of 18. What is the median? (Enter…

A: Given  X~ N(μ=54, σ2=182)

Q: Consider a puzzle is created where the amount of time it takes an individual to solve the puzzle…

A:

Q: A. What is the mean of the distribution? B. What is the standard deviation of this distribution? C.…

A: Introduction:Suppose a random variable, X has a continuous uniform distribution within an interval…

Q: 4. In the case of Standard Normal Distribution, the probability value that a random variable assume…

A: Normal Distribution is a continuous distribution.   In continuous distribution, random variable can…

Q: 17) The weights of adult beagles are normally distributed with a mean of 25 pounds and a standard…

A:

Q: 1) A physical fitness association is including the mile run in its secondary -school fitness test.…

A: It is given that the mean is 440 seconds and standard deviation 40 seconds.

Q: 4. The average ticket for a basketball game is P400. Adding cost and fare, the average cost for a…

A: here given, mean  =  2200 standard deviation  = 100 X= cost for family of four

Q: 1. A survey found that the American family generates an average of 17.2 pounds of glass garbage each…

A: Given Population mean μ=17.2, population standard deviations σ=2.5, n=55  Note: This probability…

Q: The Office of Student Services at a large western state university maintains information on the…

A: It is given that the mean is 20 and the standard deviation is 7.

Q: The average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours. A simple…

A:

Q: 3. A woodcarver produces walking sticks that follow a normal distribution with a mean length of 140…

A:

Q: 5. The average length of time required for students to complete a test in an Introductory Statistics…

A: Solution

Q: Cerebral blood flow (CBF) in the brains of healthy people is normally distributed with a mean of 74…

A: Given Information: Mean μ=74 Standard deviation σ = 16. (a) To find the proportion of healthy people…

Q: A population has a mean of 90 and a standard deviation of 7. If it is sampled repeatedly with…

A: Given that  Mean=mu=90  Standard deviation=sigma=7 n=169

Q: Consider the probability distribution for number of children in local families. Probability…

A:

Q: 1. A sample of points scored by starters in the WNBA is normally distributed with a mean of 18 and a…

A: Let X be the points scored by starters follows normal distribution with mean 18 and variance  20.…

Q: 8. The high temperatures in Virginia Beach during the month of July are normally distributed with a…

A:

Q: 12. The heights of male high school students are normally distributed with mean of 64 in and a…

A: From the provided information, Mean (µ) = 64 Standard deviation (σ) = 3.2 X~N (64, 3.2) Here X be a…

Q: a) is the maximum probability of making a Type I error that we are willing to accept   b) is the…

A: From the above data We are given that the  a) is the maximum probability of making a Type I error…

Q: 5. The average number of customers that visited a particular store during the past year is 160 per…

A: It is given that the population standard deviation is σ=25. The sample size is n=64.

Q: What is the probability that observations in a standard normal distribution will be: ?(−1.21 < ? <…

A: Given:  Z follows standard normal distribution with mean 0 and variance 1 . z1 = -1.21  z2 = 0.57 We…

Q: A normal population has a mean μ = 32 and standard deviation σ = 10. What is the probability that a…

A: Solution-: Let, X= be the random variable Given: We find,

Q: #01.  The average lifetime of smoke detectors that a company manufactures is 5 years, or 60 months,…

A:

Q: The average overseas trip cost is $2708 per visitor. If we assume a normal distribution with a…

A:

Q: A population has a mean of 90 and a standard deviation of 7. If it is sampled repeatedly with…

A: Given Mean=90 Standard deviations=7

Q: The average teacher’s salary in Connecticut (ranked first among states) is $57,337. Suppose the…

A: Given that  μ=57337σ=7500 A) The probability that a randomly selected teacher makes less than…

Q: Let X distributed as a Normal random variable with a mean of 15 and a standard deviation of  3. A)…

A: It is given that:

Q: What is the probability that observations in a standard normal distribution will be: ?(−1.34 < ? <…

A: We have to find probability using z table.

Q: For a normal distribution with a mean of 160 and a standard deviation of 10, what are the values…

A: Solution