Get the variance of the sampling distribution

Q: Derive the mean and variance of a Student's T distribution

A: Let us assume X is a random variable following standard normal distribution and Y is a random…

Q: Find the  z -score for which  85%  of the distribution's area lies to its right.

A: We want to find out Z-score for which   85%  of the distribution's area lies to its right.

Q: Using table below, find the variance for  licensed dogs per household in this county? Please show…

A: X012345P(X=x)0.590.110.090.070.02

Q: According to the Department of Education, 60% of college students enjoy taking Statistics. Suppose…

A: Let  X be the number of students who enjoy taking Statistics in a sample of 200. Given n = 200…

Q: Describe in brief the uniform distribution.

A: The uniform distribution is a probability distribution which is used when the outcomes are equally…

Q: The homogeneity of variance assumption stipulates that, O the two samples have equal variances O…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: The mean of the sampling distribution of Ỹ is always equal to the mean of the population. True O…

A: We have to determine which statement is true for given situation.

Q: Describe the indicated sampling distribution model. this city for 5 years. Let y n Statistics from a…

A:

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: Calculate the mean and standard deviation for the distribution which defines selecting a faculty as…

A: Given that  10 facility  8 administrators  8 committee  We have to find mean and standard deviation…

Q: Find the z-score that has 70.9% of the distribution area to its right

A: We have the z-score that has 70.9% of the distribution area to its right

Q: Suppose that a variable of a population has a bell-shaped distribution. If you take a large simple…

A: From the given question,

Q: Identify the distribution of the standardized version of a normally distributed variable.

A: The distribution of the standardized version of a normally distributed variable have the mean 0 and…

Q: Find the mean deviation about mean of rectangular distribution,

A:

Q: study found that 1.21% of Social Security recipients are too young to vote. If 800 Social Security…

A: Given that  A study found that 1.21% of Social Security recipients are too young to vote. P = 0.0121…

Q: For a normal distribution, find the z-score location that divides the distribution that separates…

A: From the given information, It has been given that, P (Z<z) = 0.40 Using the inverse probability…

Q: What does a distribution represent?

A: A distribution nothing but function that represent the possible values for a variable and how often…

Q: The mean of the sampling distribution of the sample mean is smaller than the mean of the…

A: According to Central limit theorem, when repeated sample of size n is drawn from a population with…

Q: Would you guess that the distribution is​ skewed, or roughly​ symmetric?

A: Given information n=57 Sample mean x̄ =81.8, Q1=72, Median Q2 = 82, Q3=92  sample size (n)=57

Q: he mean of the sampling distribution of P1-P2, the difference between sample proportions, is P1-P2…

A:

Q: For any distribution, what is the z-score corresponding to the mean?​

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: A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of…

A: The population standard deviation is unknown here. The population distribution is approximately…

Q: When the degrees of freedom is large, the t distribution becomes?

A: Given  When df is large  Then t distribution transform into ?

Q: Which is correct for a distribution that is skewed to the left?

A:

Q: investigator recommended taking a larger sample. What would the new sampling distribution look like…

A: Note: Hey there! Thank you for the question. The question mentions "sampling distribution", but does…

Q: A phone company finds that the mean data usage for its residential customers is 10GBs, and the…

A: The phone company finds that the mean data usage for its residential customer is 10 GBs.

Q: Describe the difference in shape between a gamma(shape = 5, rate= 10) distribution and a beta(shape…

A: Given:- γα=5,λ=10    and    βa=10,b=5   we have to find mean,skew and interquartile range