I need help with my assignment

Question 1

1. Compute
   the mean and the weighted mean for the following data. Show
   your work.

If
the professor asked you if you would like the mean grade or the
weighted mean grade, which would you choose? Why? What weighted
category made the greatest impact?

Question 2

1. If
   P(A) = 0.45, P(B) = 0.49, and P(A ∪ B) = 0.85, then P(B | A) =

Question
3 – You must show the fractions you multiplied to earn credit.
You may also include other math if you choose a different method.

Seven
vitamin and five sugar tablets identical in appearance are in a box.
One tablet is taken at random and given to Person A. A tablet is then
selected and given to Person B. What is the probability that

1. Person
   A was given a vitamin tablet?
2. Person
   B was given a sugar tablet given that Person A was given a vitamin
   tablet?
3. neither
   was given vitamin tablets?
4. both
   were given vitamin tablets?
5. Person
   A was given a sugar tablet and Person B was given a vitamin tablet?
6. Person
   A was given a vitamin tablet and Person B was given a sugar tablet?
7. exactly
   one person was given a vitamin tablet?

Question 4

The
following information regarding the ten richest Americans was
reported in a recent issue of Forbes.

1. How does the
   textbook define “element?” Name the elements in the
   above data set.
2. How does the
   textbook define “variable?” Name the variables in this
   data set.
3. How does the
   textbook define “observation?” Name TWO observations
   in this data set.
4. Explain why
   rank, even though it is a number, is NOT a quantitative
   variable.
5. Which
   variables are quantitative?

Question 5

A
sample of the ages of 10 employees of a company is shown
below.

20 30 30 30 50
30 30 30 20 40

1.
What is a dot plot?

2.
If this set of data were going to be used to make a dot plot, what
variable would be on the x axis? Why? What variable would
be on the y axis? Why?

3.
If you were going to make a dot plot, what would the title be?
Remember that titles show relationships between both variables.

4.
Using a method of your choosing, construct a dot plot for the above
data which includes a proper title and axis labels.

Question 6

The
following data shows the price of PAO, Inc. stock over the
last eight months.

1. Develop a
   scatter diagram and draw a trend line through the points.
   Remember everything that was said about titles, axes labels etc. in
   the previous question.
2. What kind
   of relationship exists between stock price and
   time (negative, positive, or no relation)? How
   do you know?