MAT 215 OL Week 4 Quiz Answers
You pull out one randomly taken card from a standard deck of cards.
Find the probability that the card is not a Queen.
Use formula: P(not A) = 1 P(A)
Standard deck of cards has 4 Queens out of total 52 cards
Estimate Population Proportion
First of all lets define what we call proportion in statistics.
Proportion is a ration between number of items with a certain characteristics and
total numbers of items in collection. Proportion is normally is presented in a
SOLUTIONS to Practice Questions
Z = (x )/ = (80 120)/20 = -40/20 = - 2
Use Appendix Table C.
Select row with 0.5 on the left
and move across to the column with 0.01:
P( z < 0.51) =
3. Convert 300 an
Math 215 HW#3
The standard deviation is revealing how far, on average, each value in the data set is from the
C. Highest value
D. Lowest value
If the standard deviation of a dataset is increasing, the observation
CH3 Measures of Dispersion
Measures of dispersion: Descriptive measures that depict how spread out your data values are.
Measures of spread that indicate how similar or varied the set of observed values are in your
data set. Some of these descriptive meas
Standard Deviation - Key
First watch a Bozeman Biology video explaining standard deviation and how to calculate it.
Now, given the following problems u
Chapter 12 Probability
Although the rules of probability were
first applied to gaming, they have many
other applications. The cost of your car
insurance, the weather forecast, the
expected number of people who will
attend an outdoor concert i
Solutions to Practice Problems before Test 2
1. Two jurors should be selected out of 4 male and 5 female candidates.
Find the probability that both selected jurors will be female
(First selected juror is female and second female again).
P (A and B)
Here is my table and numbers. I think I did this correctly.
1.) is Female AND lives in NY:
P(F and NY) = 87/479
2.) is Male OR lives in NJ:
P(M or NJ) = (244+63)/479 = 307/479
3.) lives in CT IF per
(Statistics I Online)
Course number/section: MAT 215 OL
Instructor: Dr. Anne Walsh
Online Office hours: T/Th 5PM-6PM
Phone (914) 439-1790
4 credit hours
Office: 41 st St. Rm B1602
On most scientific calculators, there is a PROB key. It opens nPr and nCr
for permutations and combinations. Say we have 4 people called A,B, C and D but want
to select only 2 to form a committee. How man
Conclusion was made that 60% of all New Yorkers support new policy.
Does this statement represent descriptive or inferential statistics?
Which of the following variables belong to the nominal type:
There is no order or ranking with last
Part 1. Probability P(A or B), P(A and B)
There are M&M candies in the box, red and blue and yellow.
Assign your numbers of candies for each color.
Use your numbers to calculate probability that
a) randomly taken candy is blue or red: P (Blue or Red)