Question

We know that 6% of students will fail a course. If I take a sample of 1200 students who take an online stats course find the probability that more than 100 will fail?

To solve this problem we could do it without Minitab and would be done in the following manner you answer the questions asked where x = number of students who fail

P(x > 100) x has what type of distribution? ___________________

P(x > 100.5) x has what type of distribution? _____________

P(z > 100-72/8.23) z has what type of distribution? _________________

P(z > 3.40) = 0 Based on this answer if an online course DID had over 100 failures with 1200 students would you recommend that the course be taught online? Explain

Answer #1

A researcher wants to
determine whether high school students who attend an SAT
preparation course score significantly different on the SAT than
students who do not attend the preparation course. For those who do
not attend the course, the population mean is 1050 (? = 1050). The
16 students who attend the preparation course average 1150 on the
SAT, with a sample standard deviation of 300. On the basis of these
data, can the researcher conclude that the preparation course...

Here's a question from when DM taught this course: We
hypothesize that students at DM’s lab have more psychotic episodes
than the normal students at SFSU. A sample of 50 students from DM’s
lab were randomly sampled and the mean number of psychotic episodes
that they had per year was computed to be 27. Given the following
information about the number of psychotic episodes per year that
the general population at SFSU has, answer the following questions.
µ = 25...

Professor Meanie’s persistent rate (i.e. students who do not
drop the course) is historically 65%. However, this semester he
decided to “flip” his classroom. Instead of coming to class for a
typical lecture, students are expected to watch the lecture online
the night before. The next day students will work in groups of
three on exercises that reinforce concepts from the video lectures.
He started with 120 students and 72 completed the course. Ideally,
he is trying to increase the...

1.
The average final exam score for the statistics course is 78%. A
professor wants to see if the average final exam score for students
who are given colored pens on the first day of class is different.
The final exam scores for the 11 randomly selected students who
were given the colored pens are shown below. Assume that the
distribution of the population is normal.
77, 58, 53, 90, 83, 77, 51, 72, 53, 68, 81
What can be...

I. Solve the following problem:
For the following data:
1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6 n = 12
b) Calculate
1) the average or average
2) quartile-1
3) quartile-2 or medium
4) quartile-3
5) Draw box diagram (Box & Wisker)
II. PROBABILITY
1. Answer the questions using the following
contingency table, which collects the results of a study to 400
customers of a store where you want to analyze the payment
method.
_______B__________BC_____
A...

i. A researcher estimated the proportion of voters who favor the
Democratic candidate in an election. Based on 500 people she
calculates the 95% confidence interval for the population
proportion p: 0.123 <p<0.181.
Which of the following is a valid interpretation of this
confidence interval ?______
a. There is a 95% chance that the true value of p lies between
0.123 and 0.181
b. If many different samples of 500 were selected
and a confidence interval was constructed based on...

Item 6
In the case below, the original source material is given along
with a sample of student work. Determine the type of plagiarism by
clicking the appropriate radio button.
Original Source Material
Student Version
The theory we have constructed originates with the three phases
of learning described above. We have organize and adapted the
features of simulations to provide the learner with the
most effective and efficient presentations in order to achieve
successful acquisition, application and assessment.
Our general...

(15%) For Applied Management Statistics class you want to know
how college students feel
about the transportation system in
Barcelona.
What is the population in this study?
What type of sample would you use and why?
(25%) A manager of an e-commerce company would like to
determine average delivery time of the products. A sample of 25
customers is taken. The average delivery time in the sample was
four days. Suppose the delivery times are normally distributed with
a standard...

1. Find the area under the standard normal curve (round to four
decimal places)
a. To the left of z=1.65
b. To the right of z = 0.54
c. Between z = -2.05 and z = 1.05
2. Find the z-score that has an area of 0.23 to its right.
3. The average height of a certain group of children is 49
inches with a standard deviation of 3 inches. If the heights are
normally distributed, find the probability that a...

Instructions: Write probabilities to four decimal places
(percentages to two decimal places).
Draw bell curves to illustrate each desired areas. Use the
correct probability notation (e.g. P(X
>12.5) = P(z > 1.2) …. Use the Standard Normal
Distribution Table to answer Questions 1
& 8).
1. The total blood cholesterol levels in a certain Mediterranean
population are found to be
normally distributed with a mean of 160 milligrams/deciliter
(mg/dL) and a standard
deviation of 50 mg/dL. Researchers at the National...

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