Question

Scores for students on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of 108. A random sample of 36 students who took the SAT-I test is selected. Let ?̅ represent the mean score of the sample.

3. Find the mean and standard deviation of

?̅, ?.?., ?D̅,?D̅.

(a) ?D̅ = 509 ?D̅ = 108 , (b) ?D̅ = 509 ?D̅ = 18 ?D̅, (c) ?D̅ = 84.833

?D̅ = 108, (d) ?D̅ =509 ?D̅ =3, (e) ?D̅ = 14.139 ?D̅ =3

Step 1

Denote *X* as the Sat-I test score. It is given that *X* is normally distributed, with mean *μ* = 509 and standard deviation *σ* = 108. A random sample of 36 students were taken at random,

Step 2

For this problem let us assume ?¯ is same as X bar.

Let X bar be the mean Sat-I score. It is known that,

Step 3

Therefore, in this...

Tagged in

Q: An epidemiologist found five cases of “big toe cancer” in the Yukon Territory. Because there were on...

A: Note: Since we are authorized to answer only up to 3 subparts, we are answering first three subparts...

Q: In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6...

A: The provided details:

Q: Let A and B be two events with P(A and Bc) = 1. Find P(B). Recall that Bc denotes the complement of ...

A: Intersection of events:The probability that events A and B both occur is the probability of the inte...

Q: This study investigated the cognitive effects of stimulant medication in children with Attention-Def...

A: Click to see the answer

Q: How do you calculate a coefficient of correlation of two indexes’ returns?

A: Let the two indexes’ returns be A and B.The coefficient of correlation measures the degree to which ...

Q: Describe when a given distribution is a probability distribution.

A: Let us assume X be a random variable such that X connected with the outcome of a random experiment w...

Q: given that the sample mean=105, pop standard deviation=27, n=44, a=0.01 what is the critical s-score

A: Note: In this question it has mentioned that we have to find the s – score but it seems that it is a...

Q: A researcher wants to investigate whether mindfulness training improves ability for employees to not...

A: A dependent variable is a variable which is being tested and measured in any scientific experiment.

Q: The point on a normal distribution (mean equals 6 and standard deviation equals 9) that is greater t...

A: The given information is that the scores distributed normally with mean 6 and standard deviation 9.F...

Sorry about that. What wasn’t helpful?