Description
You have four questions related to this problem. On your own paper, work the problem just as you would for a homework assignment. After you have worked the problem, following all the appropriate steps, THEN answer the following four questions presented about this problem.
For the following set of quiz scores, you will calculate (using the computational method) the standard deviation: 10, 7, 10, 6, 9, 11. Calculate the standard deviation using the computational method.
After you complete this problem on your own paper, then answer the following four questions.
Flag question: Question 38
Question 38
1 pts
Question 1 of 4:
When you started to calculate the standard deviation of these values, you had to calculate the mean. What is the M of this distribution (rounded per our class rounding rules)?
Flag question: Question 39
Question 39
1 pts
Question 2 of 4
When you plug in values into the formula, what is the value for
X2 ?
Flag question: Question 40
Question 40
1 pts
Question 3 of 4:
What is the standard deviation?
Flag question: Question 41
Question 41
1 pts
Question 4 of 4:
What is the variance?
You will have 2 questions
about this problem. Work this problem on your paper just as you would
if it was a homework assignment. After you have completed the problem.
Answer the two questions.
A distribution has a SD of 8 and a Range of 23. Evaluate for kurtosis.
Flag question: Question 42
Question 42
1 pts
Question 1 of 2:
When you are working this formula, you get to a point where 8 ?
____. What is the value that goes in the blank (rounding per the
instructions given in class)?
Flag question: Question 43
Question 43
1 pts
Question 2 of 2.
What is the kurtosis?
Flag question: Question 44
Question 44
1 pts
You have just this one question for this problem. Work this problem as you would if it was a homework question, then answer the question.
Given a normal distribution, find the percentage of scores that fall above a z score of -1.49.
You have two questions
about this problem. Work the problem exactly as you would for a
homework assignment. After you finish the problem, answer the two
questions.
The average weight among a group of male college students is
170 pounds with a standard deviation of 19.91 pounds. Assuming a normal
distribution, what percentage of males weigh less than 158 pounds?
Flag question: Question 45
Question 45
1 pts
Question 1 of 2:
For this problem, what is the calculated z score?
Flag question: Question 46
Question 46
1 pts
Question 2 of 2:
For this problem, what is the answer to this problem?
You have three
questions about this problem. Work the problem (on your paper that you
will turn in) exactly as you would for a homework assignment. After
you finish the problem, answer the three questions.
The average grade-point average for the freshman class at
Diamond University is 2.00, with a standard deviation of .65. Assuming a
normal distribution, what is the percentile rank for a grade-point
average of 2.45?
Flag question: Question 47
Question 47
1 pts
Question 1 of 3:
For this problem, you have to calculate z. When you are calculating z, what is the value that you plug into the formula for X?
Flag question: Question 48
Question 48
1 pts
Question 2 of 3:
At one point in the problem, when working the problem as we did in class, you will have % = ______.
Flag question: Question 49
Question 49
1 pts
Question 3 of 3:
What is the answer to this question? The percentile rank = _____
There are two questions for this problem. Work this problem exactly as you would for a homework problem, then answer the 2 questions.
At a certain place of business, in the 2020 presidential
election, 110 people voted for Joe Biden, 70 people voted for Donald
Trump, and 20 people voted for a third party candidate. What is the
probability of choosing at random someone from this place of business
who voted for Donald Trump?
Flag question: Question 50
Question 50
1 pts
Question 1 of 2:
When you are solving for the probability, what is the value you use for t?
Flag question: Question 51
Question 51
1 pts
Question 2 of 2:
What is the answer to this question? p = ___
You have two questions about this problem. Work the problem as you would for homework, then answer the two questions.
You are doing field research to determine the probability that
someone will choose to use the elevator to go to the second floor of an
office building. You stand near the stairs and elevator and keep a
record of how many people choose the stairs and how many people choose
to use the elevator. Of the 89 people that you observed going to the
second floor, 25 people chose to use the elevator while 64 people chose
to use the stairs. According to your research, what is the expected
relative frequency of someone choosing to use the elevator in that
office building?
Flag question: Question 52
Question 52
1 pts
Question 1 of 2 questions:
What is the number of successes?
Flag question: Question 53
Question 53
1 pts
Question 2 of 2:
According to your research, what is the expected relative frequency
of someone choosing to use the elevator in that office building? p =
_____
You have two questions about this problem. Work the problem as you would for homework, then answer the two questions.
The distribution of the exam scores in your statistic class
is normally distributed. The average exam score was 85 with a standard
deviation of 7. What is the probability of selecting at random a
student who scored 90 or lower?
Flag question: Question 54
Question 54
1 pts
Question 1 of 2:
State the z score you calculated in this problem. z = ____
Flag question: Question 55
Question 55
1 pts
Question 2 of 2:
What is the answer to this problem? p = ____.
You have two questions about this problem. Work the problem as you would for homework, then answer the two questions.
Young men that play college baseball were asked to throw a
baseball as far as possible. The mean distance was 255 feet, with a
standard deviation of 19.92 feet. Given a normal distribution, what is
the probability of selecting at random a male college baseball player
who could throw between 225 and 275 feet?
Flag question: Question 56
Question 56
1 pts
Question 1 of 2:
At one point in this problem you get % = ____.
