Σ(- x i 1 9. Find the variance. Hint: S x п—1 10. Prove that when exam scores are weighted equally, the weighted mean is the same as the mean. 1.e. P n Σ. when scores are weighted equally XWi п i=1 i=1 n 11. The mean SAT (Scholastic Aptitude Test) score is 900 with a standard deviation of 200. According Chebyshev's Theorem at least what proportion of scores are between (a) 700 and 1100? (b) 500 and 1300? (c) 300 and 1500? п 12. Prove that the sum of the deviations from the mean is zero. i.e. Prove that (x- x) = 0. i-1 13. Use the following equation predicting pounds of garbage based on the number of people in the hou garbage = 10 household size+ 15 (a) Identify and interpret the slope. (b) Identify and interpret the intercept. (c) Find the residual of a household with 3 people which discarded 40 pounds of garbage. (d)Fill in the blank: The least squares linear regression line minimizes 14. One study showed a strong positive correlation between the number fire trucks sent to a fire and t

Q: 4. 10p-p-2

A: The given expression is : 10p2-p-2 To factorize the given expression.

Q: could please write this in on a piece of paper, so that it is easier to understand?

A:

Q: I already put .103 and it was incorrect.

A: The given z-scores are z=1.12 and z=1.9.

Q: the up numbers are all wrong it says

A: It is given that the class width is 10 and the lower limit is 30.

Q: This answer is incorrect. Can you try again?

A:

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Q: What is supposed to be in place of the question mark in Step 2?

A: Step - I: f(n) = 3n2 + 2n - 1         < 3n2 + 2n          ≤ 3n2 + 2n2 for n ≥ 1            = 5n2…

Q: It was not 126. I cannot figure it out

A: We have to Find the fifth root of -32i that graphs in the fourth quadrant.

Q: 1.

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Q: Make up a question that has 25 -1 as its solution. Explain.

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Q: If the vase is filled with water with density 1000 kg/m², set up an integral representing how much…

A: Part(a):   The volume of the vase:   First find the area of the vase is :

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A: Given the back of a credit card shows a 3-digit card verification (CVC). The digits can be any…

Q: There are 368 people employed at George Mason University. If 3/8 of the employees are professors,…

A:

Q: I'm very confused. I get to step 3 and i get lost. Please help.

A:

Q: Lab 8 Activity After watching the activities described in the videos, develop a worksheet to check…

A: This is a problem related to your overall observation and focus during the lab videos activities.…

Q: . Write in terms of up and 10 9

A: Given query is to find indicated angle.

Q: t says select ONE. There's only one correct answer.

A: X has normal distribution with mean =120 and standard deviation =15.That is X has N() distribution…

Q: Can you clarify step 3 . I don't understand where you got those numbers.

A: Solution: The formulae for the combination is  nCr=n!r!×(n-r)!