In an test attended by 1500 people, a distribution with a grade point average of 58 and a standard deviation of 6.8 is shown.10 samples of 25 people are taken with non-refundable draws. How many of these 40th sample mean in the range of [55-60 ].

Q: A consignment of 180 articles is classified according to the size of the article as under. Find the…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A sociologist finds that for a certain population, the mean number of years of education is 13.20.…

A:

Q: From a sample with n=32, the mean number of televisions per household is 4 with a standard deviation…

A: Chebyshev’s rule can be used for the large set data. It says that at least 1-1/k2 percentage of the…

Q: A random sample of 15 chemists from Washington state shows an average salary of $40118 with a…

A: Solution: Given information: n1= 15 Sample size of Sample 1n2= 22  Sample size of Sample 2x1= $40118…

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

A:

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

A: The random variable X is the average of the 49 races. The mean is 142, and standard deviation is 13.…

Q: A random sample of 21 chemists from Washington state shows an average salary of $47066 with a…

A:

Q: In 1999, the murder rates (per 100000) for the 50 states and the District of Columbia had a mean of…

A: Given mean is 5.9 and standard deviation 6.3 sample size is 5

Q: Suppose the neck size of men is normally distributed, with a mean of 15.5 inches and a standard…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: From the provided information, Mean (µ) = 116 Standard deviation (σ) = 14 X ~N (116, 14)

Q: In a certain factory of rags, the time it takes for the workers to finish one rag is normally…

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

Q: sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

A:

Q: In a group of 10 workers, the wage of the lowest paid worker is $ 225 less than the average wage of…

A: Given : N=10 Lowest paid worker = 225 We have to tell standard deviation of wages = 7.53

Q: A random sample of 22 chemists from Washington state shows an average salary of $42044 with a…

A:

Q: a random sample is selected from a population with a standard deviation of 18. On average, how much…

A: We have to find standard error for given data.

Q: From a sample with n=20​, the mean number of televisions per household is 4 with a standard…

A: Given n=20

Q: Suppose the neck size of men is normally distributed, with a mean of 15.5 inches and a standard…

A: We know by empirical rule that; If, X~Normal(μ,…

Q: From a sample with n=16​, the mean number of televisions per household is 4 with a standard…

A: Solution: Let X be the number of televisions per household. From the given information, n=16, σ=1…

Q: A random sample of 16 chemists from Washington state shows an average salary of $41431 with a…

A: Given Data: Significance level = 0.01 Critical value = 2.454

Q: Suppose that a category of world-class runners are known to run a marathon (26 miles) in an average…

A: Mean = 145 Standard deviation = 14 Sample size = 49

Q: A random sample of 23 chemists from Washington state shows an average salary of $49144 with a…

A:

Q: Nationally, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A:

Q: If the average low temperature of a winter month in Rochester, NY, is 21∘ and the standard deviation…

A:

Q: A group of apples from a particular grower were found to have diameters with a mean of 69.0 mm and a…

A:

Q: for a population with a standard deviation of 5 and mean of 48, draw a bell shaped curve, marking…

A: Given data, Mean=48 sd=5 Draw a bell shaped curve?

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

A:

Q: Suppose a simple random sample of size n=81 is obtained from a population with a mean of 88 and a…

A: Given sample of size n=81 mean=88 standard deviation =27.

Q: In a normal distribution with mean 375 and standard deviation 48, how large a sample must be taken…

A: It is an important part of statistics. It is widely used.

Q: For a population with a standard deviation of σ = 20, how large a sample is necessary to have a…

A: Standard error is given by: SE=σn

Q: The brain volumes (cm3​) of 20 brains have a mean of 1052.4 cm3 and a standard deviation of 122.2…

A: It is given that the mean is 1,052.4 and the standard deviation is 122.2.

Q: ording to one pollster, 47% of children are afraid of the dark. Suppose that a sample of size 20 is…

A: Consider "p" be the true proportion which represents the proportion of children that are afraid of…

Q: The IQs of 600 applicants of a certain college are approximately normally distributed with a mean of…

A:

Q: The scores for a standardized reading test are found to be normally distributed with a mean of 300…

A: Given : mean = μ = 300 standard deviation = σ = 40 sample size = n = 490

Q: a random sample is selected from a population with a standard deviation of  56. On average, how much…

A:

Q: professor is concerned that the two sections of college algebra that he teaches are not performing…

A: Given : Claim : Two sections of college algebra that he teaches are not performing at the same…

Q: oup of 10 friends played a mini-golf competition. Eight of the friends tied for second place, each…

A: Given: Let the missing score be a. The data for scores (X) is shown below 34 34 34 34 34…

Q: The numbers of books checked out daily at a local library are normally distributed with a mean of…

A:

Q: A population has a standard deviation of σ = 24. a.  On average, how much difference should exist…

A: Given : A population standard deviation : σ=24. The average distance of sample mean from population…

Q: The average time taken for the nearest Covid-19 ambulance team to convey a patient showing symptoms…

A:

Q: Suppose a candidate for public office is favored by only 47% of the voters. If a sample survey…

A: Given Population mean=0.47 Population standard deviations=0.01

Q: A certain data set has a mean of 60 and a standard deviation of 12. Given that the data set has 120…

A:

Q: A simple random sample of 25 has been collected from a normally distributed population for which it…

A: Obtain the 95% confidence interval for the population mean. The 95% confidence interval for the…

Q: The IQs of 600 applicants of a certain college are normally distributed with a mean of 115 and a…

A: The random variable IQ follows normal distribution. The population mean is 115. The population…

Q: Group A has 12 people and it is a random sample and they have an average heart rate of 100 and their…

A:

Q: In a certain factory of rags, the time it takes for the workers to finish one rag is normally…

A:

Q: In a recent​ year, the mean test score was 1539 1539 and the standard deviation was 310 310. The…

A: Given:

Q: Suppose x has a distribution with a mean of 50 and a standard deviation of 36. Random samples of…

A: Solution: From the given information, X has a mean µ=50 and a standard deviation σ=36. The sample…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 444 and a standard…

A: We have to find limits that include 68% data.

Q: Suppose​ 36% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: The known values are, Let X denote the number of​ movie-goers that prefer​ horror and it follows…

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 253.8…

A: GivenMean(μ)=253.8standard deviation(σ)=61.7