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Mr. Gregory White
Mr. Gregory White, Master's Degree
Category: Pre-Calculus
Satisfied Customers: 4738
Experience:  M.A., M.S. Education / Educational Administration
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Teacher Greg, Hello, Are you available now ?

Resolved Question:

Teacher Greg,
Hello,

Are you available now ?
Submitted: 2 years ago.
Category: Pre-Calculus
Expert:  Mr. Gregory White replied 2 years ago.
I sure am available.

Go ahead and post what you are needing today.

:-)
Customer: replied 2 years ago.

Hi ,

I what see if I can copy and paste the quiz. I'm not very good at it but I am going to make an attempt. If I fail I will have to write type everything.

Expert:  Mr. Gregory White replied 2 years ago.

Can you take screenshots and paste them into a word document?

If you open a word document to paste into

open your window with the question and choose ctrl/prt scrn it will copy the window - then paste it into the word document - go back and do it again with the next question screen (the ctrl/prt scrn together) and then paste below the first one in the word document.

Save the word document to your computer and then upload to either mediafire.com or box.com - then share the link

Will save you a ton of writing - typing it also results in errors sometimes that can result in incorrect answers.

Customer: replied 2 years ago.












Time Remaining:





























1. Use a scatter plot to deternine the relationship between
the x values and the y values.
x|4 2 7 5 3 6 1 y| 31 19 43 35 27 41 14 ( the x numbers are over the y numbers
(Points : 1)

No relationship

Nonlinear relationship

Positive linear
relationship

Negative linear
relationship














2. Find Q1, Q2, and
Q3 for the data set below.
5.4 2.0 6.8 3.1
2.9 4.7 2.1 5.0 1.9 3.4 (Points : 1)

Q1 = 2.05,
Q2 = 3.1, Q3 =
5.2

Q1 = 2.05,
Q2 = 3.25, Q3 =
5.2

Q1 = 2.1,
Q2 = 3.25, Q3 =
5.0

Q1 = 2.1,
Q2 = 3.4, Q3 =
5.0














3. Use a scatter plot to deternine the relationship between
the x values and the y values.

X| 7 2 4 5 1 6 3 y| 5 26 20 15 30 12 25 ( again, the x numbers are above the y numbers )
(Points :


Negative linear
relationship

Nonlinear relationship

No relationship

Positive linear
relationship














4. Find the value for the correlation coefficient
r.

x| 5 1 4 2 3 y| 5 10 12 4 8
(Points : 1)


-0.073

-0.094

-0.203

-0.149















5. Find the area under the normal distribution curve
between z = 1.52 and z = 2.43. (Points : 1)

0.929

0.436

0.493

0.057















6. Kate scored in the 95th percentile rank on an exam. If
400 students took the exam, how many students scored lower than Kate? (Points :
1)

379

381

378

380















7. To select a _________ sample, the population is divided
into disjoint subgroups according to some characteristics like income level, and
then a few individuals are selected randomly from each of the subgroups to be in
the sample. (Points : 1)

stratified

random

cluster

systematic















8. Find the equation of the regression line.

x|10 8 7 12 14 5 y| 20 19 17 25 28 9
(Points : 1)


y = 1.7 +
1.9x

y = 2.5 +
2.7x

y = 1.9 +
1.7x

y = 2.7 +
2.5x














9. If a student's percentile rank in a class of 400
students is 87, find the student's class rank. (Points : 1)

40

44

48

52















10. Find the area under the normal distribution curve
between z = -1.34 and z = 2.95. (Points : 1)

0.908

0.088

0.410

0.498















11. For the 20 test scores shown, find the percentile rank
for a score of 86.
75 63 92 74 86 50 77 82 98 65 71 89 75 66 87 59 70 83 91
73 (Points : 1)

75th percentile

30th percentile

80th percentile

70th percentile















12. Which statement is true for a statistical study?
(Points : 1)

The sample is a subset of the
population.

The population is a subset of the
sample.














13. Find the area under the normal distribution curve to
the right of z = -1.03. (Points : 1)

0.151

-0.349

0.349

0.849















14. The average amount customers at a certain grocery store
spend yearly is $636.55. Assume the variable is normally distributed. If the
standard deviation is $89.46, find the probability that a randomly selected
customer spends between $550.67 and $836.94. (Points : 1)

0.144 = 14.4%

0.820 = 82.0%

0.156 = 15.6%

0.943 = 94.3%















15. Find the median and the mean for the data set
below.
5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4 (Points : 1)

mean = 37.3; median =
3.25

mean = 3.73; median =
3.4

mean =37.3; median = 3.4

mean = 3.73; median =
3.25














16. Find the area under the normal distribution curve to
the right of z = -3.24. (Points : 1)

0.499

-0.499

0.999

0.001















17. A data set of size 19 has correlation coefficient of
r = -0.432. Test the significance of r at the 5% level and at
the 1% level. (Points : 1)

r is significant at 5% and at
1%.

r is significant at 5%, but not at
1%.

r is is not significant at 5% or at
1%.














18. The average hourly wage of employees of a certain
company is $9.83. Assume the variable is normally distributed. If the standard
deviation is $4.58, find the probability that a randomly selected employee earns
less than $5.43. (Points : 1)

0.313 = 31.3%

0.332 = 33.2%

0.168 = 16.8%

0.345 = 34.5%















19. Find the standard deviation.
44 46 33 10 50 27
(Points : 1)

1694

186.67

14.97

224.1















20. Armia's percentile rank on an exam in a class of 300 is
85. Sanjo's class rank is 42. Who is ranked higher? (Points : 1)

Armia

Sanjo









I hope you can understand it. The x and y equation have the x numbers on top . It seem to all me multiple choice so thank you. This is super serious. The ohter question will come afterwards with you're up to it.






Time Remaining:





Expert:  Mr. Gregory White replied 2 years ago.

CLICK HERE - this should be close to perfect.

:-)

Customer: replied 2 years ago.
Thank you, XXXXX XXXXX ! It was perfect ! I am attempting to get the word problem to you .
Customer: replied 2 years ago.



  1. Describe two
    main differences between classical and empirical probabilities.

  2. Gather coins you find around your home or in your
    pocket or purse. You will need an even number of coins (any
    denomination) between 16 and 30. You do not need more than that. Put all
    of the coins in a small bag or container big enough to allow the coins to
    be shaken around. Shake the bag well and empty the coins onto a table.
    Tally up how many heads and tails are showing. Do ten repetitions of
    this experiment, and record your findings every time.

    • State how many coins you have
      and present your data in a table or chart.

    • Consider just your first
      count of the tossed coins. What is the observed probability of tossing a
      head? Of tossing a tail? Show the formula you used and reduce the answer
      to lowest terms.

    • Did any of your ten
      repetitions come out to have exactly the same number of heads and tails?
      How many times did this happen?

    • How come the answers to the
      step above are not exactly ½ and ½?

    • What kind of probability are
      you using in this "bag of coins" experiment?

    • Compute the average number of
      heads from the ten trials (add up the number of heads and divide it by
      10).

    • Change this to the average
      probability of tossing heads by putting the average number of heads in a
      fraction over the number of coins you used in your tosses.

    • Did anything surprising or
      unexpected happen in your results for this experiment?



  3. Write the sample space for the outcomes of tossing
    three coins using H for heads and T for tails.

    • What is the probability for
      each of the outcomes?

    • Which kind of probability are
      we using here?

    • How come we do not need to
      have three actual coins to compute the probabilities for these outcomes?
































Expert:  Mr. Gregory White replied 2 years ago.
Give me a bit - what time you need this back by?
Customer: replied 2 years ago.
before 10pm est
Expert:  Mr. Gregory White replied 2 years ago.
will do....
Customer: replied 2 years ago.
Thank you
Expert:  Mr. Gregory White replied 2 years ago.
no problem
Expert:  replied 2 years ago.

CLICK HERE for these responses as you prepare your final answers.

All the best.

:-)

Mr. Gregory White, Master's Degree
Category: Pre-Calculus
Satisfied Customers: 4738
Experience: M.A., M.S. Education / Educational Administration
Mr. Gregory White and other Pre-Calculus Specialists are ready to help you
Customer: replied 2 years ago.
Greg , You are Great!

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