Suppose that the age of a randomly selected business major can be considered to be a random variable with mean 20 years and standard deviation 2 years. A group of 64 business majors is selected at random and their average age x¯ is calculated. a) What is the approximate sampling distribution of x¯and why?

Q: . If the sample size is 100 and the population standard deviation is 20, then the standard deviation…

A: Given n=100 SD=20

Q: If all possible random samples of size =44 are selected from a population with 70 and a 8, and the…

A: CEntral limit theorem: For a population with mean μ and a standard deviation σ, the distribution of…

Q: The height of women ages​ 20-29 is normally​ distributed, with a mean of 63.6 inches. Assume σ=2.5…

A: Given Information: The height of women ages​ 20-29 is normally​ distributed, with a mean of μ=63.6…

Q: 3. An election survey report result with state that the standard error of the mean ( standard…

A: Given that s.d =500 , standard error of mean =20

Q: The time spent commuting from home to work for all employees at a very large company has a normal…

A: Solution

Q: With regard to how data points are arranged in space or time, the Poisson distribution will have a…

A: The options for the arrangement of data points for Poisson distribution are given as,a. randomb.…

Q: 3. The commute time for Cypress College students who drive from their home to the college follows a…

A: Let X be the random variable from normal distribution with mean (μ) = 26 and standard deviation (σ)…

Q: 11. In a normally distributed set of data, if the z score is -2, how is that interpreted?

A: We know A positive z-score means the data value is larger than the mean. A negative z-score means…

Q: 24. Assume that the distribution of heights for a standard oak tree after 10 years has a mean of 15…

A:

Q: 9. Under what circumstances will the distribution of sample means be normal?

A:

Q: he graph of the waiting time (in seconds) at a red light is shown below on the left with its mean…

A: Given Information: Sample size (n) = 225 And from the first graph, mean μ=18.9 Standard deviation…

Q: The height of women ages​ 20-29 is normally​ distributed, with a mean of 64.8 inches. Assume σ=2.7…

A: Given Data Population Mean,μ = 64.8 Population Standard Deviation,σ = 2.7

Q: In a large population, 82% of the households have cable tv. A simple random sample of 225 households…

A: Given, In a large population, 82% of the households have cable tv. A simple random sample of 225…

Q: 4. If random samples of size 75 are taken from a distribution that is the distribution of the sample…

A: Here, we can apply the Central Limit Theorem. This states that if the sample size is large enough,…

Q: United States are mixed racially and ethincally.  Consider the population consisting of all married…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

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A: A negatively skewed distribution means that there is a 'hump' in the data on the right side of the…

Q: he 4 conditions necessary to assume the sampling distribution of sample proportions follows a Normal…

A: Sampling distribution follows Normal distribution if the assumption is met.

Q: (490, 510)? ne sample mean.

A: Given Data Population Mean,μ = 500.0 Population Standard Deviation,σ = 80.0 sample…

Q: erage weekly earnings of the plumbers in a city are $932 with a population standard deviation of…

A: As the population standard deviation is known, it can be said that the distribution follows a normal…

Q: The height of women ages​ 20-29 is normally​ distributed, with a mean of 63.6 inches. Assume σ=2.6…

A:

Q: 10. Assume that a randomly selected subject is given a bone density test. Those test scores are…

A: Let X be a continuous random variable of bone density test score is normally​ distributed with a…

Q: The weights of patients in a hospital have a skewed distribution with a mean of 166 lbs and a…

A: We have to find out given probabiity..

Q: what is the distribution of sample means exactly?

A: Sample is basically a group of entity which is taken from a large population. Generally analyzing a…

Q: 8. The hourly wage for Georgia Tech student interns with statistics training has a known mean of $50…

A: Given Information: Hypothesized value of population mean is 50. Sample size n=16 Sample mean x¯=52…

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A:

Q: If two samples have the same n, then the pooled variance will be the average of the two sample…

A: Statement: " If two samples have the same n, then the pooled variance will be the average of the two…

Q: Business  weekly conduct a survey of graduates from 30 top MBA programs on the basis of the survey…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.