consider the marks of all 1st year students on a statistics test. if the marks have a normal distribution with mean of 72 and standard deviation of 9, then the probability that random sample of 10 student from this group have a sample mean between 71 and 73 is?

Q: A recent survey of recently-graduated RNs revealed that their mean salary was $65,000, with a…

A: The known values are, a) The mean and standard deviation of the sampling distribution of sample…

Q: a typical adult has an average IQ score of 105 with a standard deviation of 20. If 19 randomly…

A:

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

A: Mean = 7 Standard deviation = 1 Sample size = 9

Q: Consider the marks of all 1st-year students on a statistics test. If the marks have a normal…

A: Suppose, X be the marks of statistics students, X follows Normal distribution with mean 72 and…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 15.4…

A: We have to find the probability that their mean length is less than 15.9 inches...

Q: A normal distribution is observed from the number of rentals per week for a certain car rental…

A:

Q: Suppose the age a student graduates from Salem State is Normally distributed. If the mean age is…

A:

Q: The standard deviation of monthly rents paid by students in a particular city is assumed to be $ 60.…

A: a) From the given information, the standard deviation of monthly rents paid by students in a…

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 6.1…

A: Given: Length of items = X X distribution is skewed towards right mean of X= 6.1 inches standard…

Q: The average age of all employees is 25 years, and the standard deviation of the ages of all…

A: Given,sample size(n)=100mean(μ)=25standard deviation(σ)=3

Q: Suppose a population has a mean of 400 and a standard deviation of 24. If a random sample of size…

A: Given that, mean = 400 standard deviation =  24 n = 144

Q: Suppose the scores, on a college entrance examination are normally distributed with a mean of 1000…

A: We have given that Suppose the scores, on a college entrance examination are normally distributed…

Q: Assume the values of accounts receivable by a corporation are distributed with a true mean of…

A:

Q: Assume that the women's heights are normally distributed with a mean of 63.7 inches and a standard…

A:

Q: Assume that IQs are normally distributed with a mean of 120 and standard deviation of 20. For a…

A:

Q: The heights of 18 year-old men are approximately normally distributed, with a mean 68 inches and a…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 7.4 inches,…

A: Let "M" be the mean length of the item in inches.

Q: In a population of heroin users, the mean duration of heroin abuse is 5 years with a standard…

A: From the provided information, Mean (µ) = 5 years Standard deviation (σ) = 3 years X~N (5, 3) Sample…

Q: SAT scores (out of 2,400) are normally distributed with a mean of 1,500 and a standard deviation of…

A: It is given that the mean and standard deviation are 1,500 and 300, respectively.

Q: A population which has a size of N=100 has a mean of 50 and a standard deviation of 10. What is the…

A:

Q: ) If an artic char is chosen at random, what is the probability that it is longer than 140 cm? b)…

A: Given: mean = 127cm     standard deviation = 16cm  let x be the length of artic char to find: i) If…

Q: The average score of employees on mental examinations is 110. Suppose that nothing is known about…

A: We have given that, Mean (mu) = 110    SD(sigma) = 28   n= 90 Mean(x-bar) = 102

Q: The distribution of heights for women in the United States is approximately normal, with a mean of μ…

A: Where,

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 18.2…

A:

Q: Suppose that the height distribution of students in your class was normally distributed with mean 68…

A:

Q: A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly…

A: Given information- Population mean, µ = 105 Population standard deviation, σ = 20 Sample size, n =…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 14.5…

A: We have to find given probability.

Q: Suppose the salaries of a company that pays to its employees are normally distributed with an…

A:

Q: Suppose the number of movies people rent per month is normally distributed with a mean of 4.8 and a…

A: Let x be the number of movies people rent per month which follows normal distribution with mean 4.8…

Q: Suppose the average age of a Tulane undergraduate is 20 years with a standard deviation of 1.2…

A:

Q: A manufacturer knows that their items have a lengths that are approximately normally distributed,…

A: Given, Item have length follows normal distribution with mean 11.9 and standard deviation 1.1…

Q: If 200 scores a taken at random from a normal distribution with mean 70 and standard deviation 5,…

A: From the given information,  the value of mean is 70, standard deviation is 5 and sample size (n) is…

Q: If the weights of sheep are considered normally distributed with a mean of 60 kg and a standard…

A: let  x is defined as the weights of sheep are considered normally distributed with a mean of 60 kg…

Q: A waitress keeps track of the tips she earns and knows that her mean tip is 15% with a standard…

A: We have been given that a waitress keeps a track of the tips that she earns and knows that her mean…

Q: Suppose that in a certain population of fish, the lengths of the individual fish follow…

A:

Q: Suppose the scores, x, on a college entrance examination are normally distributed with a mean of…

A: Solution: Let X be the score on a college entrance examination. From the given information, X…

Q: Suppose a population has a mean of 90 and a standard deviation of 28. If a random sample of size 49…

A:

Q: In a test taken by a large number of students, the average score of the test takers is 90 and the…

A: The mean is 90 and the standard deviation is 4.

Q: Suppose that weights of one-pound bags of apples follow the normal distribution with the mean of 1…

A: Given Population mean μ=1, standard deviations σ=0.2,  Let X be the weight of one pound bags off…

Q: Suppose the average age at death of a California Adventist is 85.5 with a standard deviation of 5.6…

A: Given Data: Let X represent the random variable Mean=85.5 SD=5.6   Assuming normal distribution X~…

Q: The standard deviation of monthly rents paid by students in a particular city is assumed to be $ 40.…

A: Given: Standard deviation of monthly rent paid by students, σ=40.            Let X denotes the…

Q: 11. If the scores for an 1Q Test have a mean of 100 and a standard deviation of 15, find the…

A: We have to find given probability.

Q: The distribution of heights for men in the United States is approximately normal, with a mean of μ =…

A: Where,

Q: To study the IQ of middle school students, a sample of 64 middle schoolers is selected and the…

A:

Q: Suppose the weights of seventh-graders at a certain school vary according to a Normal distribution,…

A: Given information Sample mean x̅ = 98 Population mean µ = 100 Sample size = 35 Standard deviation =…

Q: The weights of the fish in a certain lake are normally distributed with a mean of 15 lb. and…

A: Consider X be a random variable which follows normal distribution indicates the weight of fish. The…

Q: The monthly electric bill for all Great Lakes Electric Company are known to be distributed as a…

A: Given that  The monthly electric bill for all Great Lakes Electric Company are known to be…

Q: The test scores of 600 students are normally distributed with a mean of 76 and a standard deviation…

A:

Q: At a large manufacturing company the mean age of workers is 37 years, and the standard deviation is…

A: When the given sample size is more, that means 30 are more than 30, then we use a large sample test.…

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.