Question
Offered Price $21.00

DeVry Houston MATH 221 -Final Exam Review Solution

Question # 00013256
Subject: Mathematics
Due on: 05/12/2014
Posted On: 04/23/2014 02:59 PM

Rating:
4.1/5
Expert tutors with experiences and qualities
Posted By
Best Tutors for school students, college students
Questions:
4722
Tutorials:
4991
Feedback Score:

Purchase it
Report this Question as Inappropriate
Question

1) Jack weighs 160 pounds and his sister weighs 110 pounds. If the mean weight for men his age is 175 with a standard deviation of 14 pounds and the mean weight for women is 145 with a standard deviation of 10 pounds, determine whose weight is closer to "average." Write your answer in terms of z-scores and areas under the normal curve.

2) Explain the difference between a population and a sample. In which if these is it important to distinguish between the two in order to use the correct formula? mean; median; mode; range; quartiles; variance; standard deviation.

3) The following numbers represent the weights in pounds of six 7-year old children in Mrs. Jones' 2nd grade class.

{25, 60, 51, 47, 49, 45}

Find the mean; median; mode; range; quartiles; variance; standard deviation.

4) The Student Services office did a survey of 500 students in which they asked if the student is part-time or full-time. Another question asked whether the student was a transfer student. The results follow.

Transfer Non-Transfer Row Totals
Part-Time 100 110 210
Full-Time 170 120 290
Column Totals 270 230 500

a) If a student is selected at random (from this group of 500 students), find the probability that the student is a transfer student. P (Transfer)
b) If a student is selected at random (from this group of 500 students), find the probability that the student is a part time student. P (Part Time)
c) If a student is selected at random (from this group of 500 students), find the probability that the student is a transfer student and a part time student. P(transfer part time).
d) If a student is selected at random (from this group of 500 students), find the probability that the student is a transfer student if we know he is a part time student. P(transfer | part time).
e) If a student is selected at random (from this group of 500 students), find the probability that the student is a part time given he is a transfer student. P(part time | transfer)
f) Are the events part time and transfer independent? Explain mathematically.
g) Are the events part time and transfer mutually exclusive. Explain mathematically.
5) How do you recognize a binomial experiment?
6) How do you recognize a Poisson experiment?
7) How do you recognize a normal distribution?
8) How do you recognize a discrete distribution?
9) If a normal curve is continuous how are we able to use it for countable random variables as well?
10) Which of the following represent continuous distributions?
a) The lengths of fish in a certain lake. --
b) The number of fish in a certain lake. --
c) The diameter of 15 trees in a forest. --
d) How many trees are on a farmer's acre. . --

11) On a dry surface, the braking distance (in meters) of a certain car is a normal distribution with mu = 45.1 m and sigma = 0.5 m.
a) Find the braking distance that corresponds to z = 1.8
b) Find the braking distance that represents the 91st percentile.
c) Find the z-score for a braking distance of 46.1 m
d) Find the probability that the braking distance is less than or equal to 45 m
e) Find the probability that the braking distance is greater than 46.8 m
f) Find the probability that the braking distance is between 45 m and 46.8 m.
12) To predict the annual rice yield in pounds we use the equation
where x1 represents the number of acres planted (in thousands) and where x2 represents the number of acres harvested (in thousands) and where r2 = .94.
a) Predict the annual yield when 3200 acres are planted and 3000 are harvested.
b) Interpret the results of this r2 value.
c) What do we call the r2 value?
13) What type of relationship is shown by this scatter plot?

14) What values can r take in linear regression? Select 4 values in this interval and describe how they would be interpreted.

15) Does correlation imply causation?

16) What do we call the r value.

17) If we have data with min = 2; Q1 = 10; median = 12; Q3 = 15; and max = 21; draw a box and whisker.

18) If we have the following data

34, 38, 22, 21, 29, 37, 40, 41, 22, 20, 49, 47, 20, 31, 34, 66

draw a stem and leaf

Tutorials for this Question
Available for
$24.00

DeVry Houston MATH 221 -Final Exam Review Solution

Tutorial # 00012813
Posted On: 04/23/2014 03:01 PM
Posted By:
Best Tutors for school students, college students vikas
Expert tutors with experiences and qualities
Questions:
4722
Tutorials:
4991
Feedback Score:
Report this Tutorial as Inappropriate
Tutorial Preview …SolutionDeVry xxxxxxx MATH…
Attachments
DeVry_Houston_MATH_221_-Final_Exam_Review_answers.doc (79 KB)
Preview: 100 xxxxxxxx which xxx both transfer xxx part time xxxxx are xxx xxxx time xxxxxxxx P(transfer part xxxxx 100/210 EMBED xxxxxxxx 3 xxxx xx If x student is xxxxxxxx at random xxxxx this xxxxx xx 500 xxxxxxxxxx find the xxxxxxxxxxx that the xxxxxxx is x xxxx time xxxxx he is x transfer student xxxxxx time xxxxxxxxx xxxxxx time xxxxxxxxx 100/270 EMBED xxxxxxxx 3 3704 xx Are xxx xxxxxx part xxxx and transfer xxxxxxxxxxx Explain mathematically xxx definition xx xxxxxxxxxxx is xxxxx P(A) To xxxx we ask xx P(part xxxx xxxxxxxxx P(part xxxxx Is 3704 xx No, there xxx the xxxxxx xxx not xxxxxxxxxxx We could xxxx test P(transfer xxxx time) xxxxxxxxxxx xx 4762 xx Again, the xxxxxx is no xx Are xxx xxxxxx part xxxx and transfer xxxxxxxx exclusive Explain xxxxxxxxxxxxxx For xxxxxx xx be xxxxxxxx exclusive their xxxxxxxxxxxx must be x In xxxx x we xxxxx that P(transfer xxxxx Equation 3 xxxx time) xxxxxxx xx Therefore xxx events are xxx mutually exclusive xx How xx xxx recognize x binomial experiment xxxxx are exactly x outcomes xxxxxxx xxx failure xxx trials are xxxxxxxxxxx The probability xx success xx xxx same xx each trial xxxxx are a xxxxx number xx xxxxxx 6) xxx do you xxxxxxxxx a Poisson xxxxxxxxxx You xxx xxxxxxxxx things xx an interval xxx you know xxx average xxxx xxxx experience xx How do xxx recognize a xxxxxx distribution xx xx symmetric xxxxx the mean xx can use xx when x xxxxx Equation x 30 8) xxx do you xxxxxxxxx a xxxxxxxx xxxxxxxxxxxx The xxxxxxxx are integers xx If a xxxxxx curve xx xxxxxxxxxx how xxx we able xx use it xxx countable xxxxxx xxxxxxxxx as xxxx Because of xxx.....
Purchase this Tutorial @ $24.00 *
* - Additional Paypal / Transaction Handling Fee (3.9% of Tutorial price + $0.30) applicable
Loading...