GPA of students enrolled at a university has an approximately normal distribution with a mean of 3.02 with a standard deviation of .29. Find the probability that the mean GPA of a random sample of 20 students selected. 1. 3.10 or higher 2. 2.90 or lower

Q: The amount of daily sales of a candy shop on weekdays is approximately normally distributed with a…

A: Given: μ=4200 and σ=720. a)…

Q: A physical fitness association is including the mile run in its school fitness program. The time for…

A:

Q: bank’s loan officer rates applicants for credit.  The ratings are normally distributed with a mean…

A: Given,

Q: The Atlanta Braves baseball team has a mean batting average of 250 with a standard deviation of 20.…

A:

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given: The variable under consideration follows normal distribution with mean 0 and standard…

Q: The weight of female goats is Normally-distributed with a mean of 145 lbs. and a standard deviation…

A: X~N(145,9^2) n=8, Xbar=139, s=11, sigma=sd=9. We want to find P(139<X<145)= ?

Q: A brisk walk at 4 miles per hour burns an average of 300 calories per hour. If the standard…

A: It is given that amount of calories burned follows N (300, 8). The probability that a person who…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Here, µ = 207, σ = 1.5.

Q: Tom's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.…

A: Given that  The Tom's commuting time from his residence in Carmel to the IUPUI campus has a normal…

Q: Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, NY gets an average…

A: Given: The average rainfall of each year is 35.4" and the standard deviation is 4.2".  x is the…

Q: Adult male heights are normally distributed with mean 72.33 inches and a standard deviation of 3.25…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The life of a Radio Shack record player is normally distributed with a mean of 4 years and a…

A:

Q: Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2 million in a…

A: Given that  Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2…

Q: The tread life of a particular brand of tire is a random variable best described by a normal…

A:

Q: Provide an appropriate response. The length of time it takes college students to find a parking spot…

A: Obtain the Z-score for the random variable X equals 3.0. The Z-score for the random variable X…

Q: Drivers pay an average of u = $690 per year for automobile insurance. The distribution of insurance…

A: Solution: Let x  be the insurance payments has normal distribution with mean μ=$690 and standard…

Q: population has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of size…

A: Given Information: Population mean μ= 200 Population standard deviation = 50 Sample size (n) = 100…

Q: A person's level of blood glucose and diabetes are closely related. Let x be a random variable…

A:

Q: A population of students watch an average of 7.13 hours of TV per week with a population standard…

A: It is given that the mean is 7.13 hours and the standard deviation is 3.29 hours.

Q: Q.- The length of life of a battery produced by a factory has a normal distribution with a mean of…

A: We have to find probability using z table.

Q: An automobile manufacturer produces a certain model of car. The fuel economy figures of these cars…

A:

Q: SCORES IN MATM 111 FINAL DEPARTMENTAL EXAMINATION, FOLLOW A NORMAL DISTRIBUTION WITH A MEAN OF 65 IN…

A: X: scores in MATM 111 final departmental examination X has normal distribution. X~N(μ,σ) μ=65 and…

Q: company manufactures resistors that have a mean resistance of An electronics 100ohms and a standard…

A:

Q: Q/ The test score of a physics class with 800 students are distributed normally with a mean of 75…

A: Let X be the test scores of physics class Given that: X~Normalμ=75, σ=7 a) Percentage of class…

Q: A speed camera on Peterson Road records the speed of each passing vehicle. The speeds are pund to be…

A:

Q: When the weight of a parcel of oranges is measured, it is seen that the average 200 grams and…

A: Given data,μ=200σ=25P(188<X<221)=?

Q: The average number of acres burned by forest and range fires in a large county is 3,900 acres per…

A: Define the Random Variable, X : Number of acres burned by forest and range fires Given that, X ~…

Q: The average salary for teachers is $50,000 with a std. deviation of $5,000. Find probability of…

A:

Q: Scores on an entrance exam in a large university, freshman course are normally distributed with mean…

A:

Q: A population of heights is normally distributed with a mean of 68.8 inches and a standard deviation…

A:

Q: Full-time Ph. D students receive an average of $12,837 per year. If the average salaries are…

A: Given that, Mean = 12837 Standard deviation = 1500

Q: The results of a survey indicates that the time a shopper spends in a supermarket is approximately…

A: Let X be the random variable from normal distribution with mean (μ) = 45 and standard deviation (σ)…

Q: Scores on a standardized exam for 2nd graders are approximately normally distributed with a mean of…

A: Given data: Mean =72 Standard deviation  = 6

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

A: Mean = 17.2 Standard deviation = 2.5 Sample size = 55

Q: A waiterbelieves the distribution of his tips has a model that is slightly skewed to the left​, with…

A:

Q: Gas mileage of vehicles follows a normal curve.  A Ford Escape claims to get 25 mpg highway, with a…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 25 and…

Q: Find the indicated probability or percentage for the normally distributed variable. 24) A machine…

A: Let X represent diameter of the bolt Mean(X)=0.3 Standard deviation(X)=0.01   X~ Normal( 0.3, 0.012)…

Q: attendance at a large exhibition shows in Denver averages about 8000 people per day, with a standard…

A: Introduction: For a normally distributed random variable, X with mean μ, and standard deviation σ,…

Q: Repair Cost for Microwave Ovens The average repair cost of a microwave oven is $55, with a standard…

A: GivenMean(μ)=55standard deviation(σ)=8

Q: What is the probability that Boston has less than  200 sunny days in a given year?

A:

Q: Money people carry into the store is normally distributed with a mean of $258 dollars and a standard…

A:

Q: average number of pounds of meat that a person consumes per year is 218pounds. Assume that the…

A: Given, Mean = 218 pounds Standard deviation = 26 pounds. 1) The probability that a person selected…

Q: The average life of a bread-making machine is 7 years, with a standard deviation of 1 year. If the…

A: The average life of a bread making machine is 7 years, with a standard deviation of 1 year. If the…

Q: Cholesterol Content The average cholesterol content of a certain brand of eggs is 215 milligrams,…

A: Introduction: Define X as the random variable of interest here, denoting the cholesterol content in…

Q: Durations of clinical research studies awarded by a particular federal agency are assumed to follow…

A:

Q: Q2) Life of a battery in hours is known to be approximately normally distributed with standard…

A: The question is about hypo. testing Given : Population standard deviation of life of battery ( σ ) =…

Q: The respiratory rate per minute in a newborn varies according to a distribution that is…

A: Obtain the probability that a randomly chosen new-born has a respiratory rate per minute between 40…

Q: The lifetimes of a certain type of battery under continuous use follow a Normal distribution. The…

A: Given data, μ=15σ=0.95If n=20P(X>15.2)=?

Q: The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 40…

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.