Question

1. Use StatKey or Minitab Express to construct the following distributions. Remember to include all relevant output (i.e., a screenshot of your distribution in StatKey or Minitab Express) AND a clear statement of your final answer for each question. [20 points] A. Construct a z distribution to find the area above z = 0.5 B. Construct a z distribution to find the area below z = - 0.5 C. Construct a normal distribution with a mean of 100 and standard deviation of 10 to find the area above x = 105 D. Explain why your answers to A, B, and C are all the same.

Answer #1

MINITAB used.

1. Use StatKey or Minitab Express to construct the following distributions. Remember to include all relevant output (i.e., a screenshot of your distribution in StatKey or Minitab Express) AND a clear statement of your final answer for each question. [20 points]

A. Construct a z distribution to find the area above z = 0.5

B. Construct a z distribution to find the area below z = - 0.5

C. Construct a normal distribution with a mean of 100 and standard deviation of 10 to find the area above x = 105

D. Explain why your answers to A, B, and C are all the same.

The standard normal distribution is symmetric about 0. For the part c, z value for 105 is z=(105-100)/10 = 0.5. there fore area above 105 is same as area above 0.5 in standard normal distribution.

Question Set 1: Finding Probabilities on a Normal
Distribution
A. Use Minitab Express to construct a standard normal
distribution to find the proportion of the curve above z = 2.
Copy+paste your distribution here and clearly identify your final
answer. [8 points]
B. Use Minitab Express to construct a normal
distribution with a mean of 500 and standard deviation of 100 and
find the area above x = 700. Copy+paste your distribution here and
clearly identify your final answer. [8...

Use Minitab Express to construct a standard normal distribution
to find the proportion of the curve above z = 2. Show your
distribution

Part 1: Use the following steps to create a standard normal in
StatKey and answer the following questions about the variable
Z.
Go to http://www.lock5stat.com/StatKey/
Click on Normal (This is located in the theoretical
distributions section)
Notice in the right hand corner StatKey has a mean of 0 and
standard deviation of 1 as default
Notice in the left hand corner are the usual left, right and 2
tail options these will be helpful in the problems below
For each...

Question Set 2: Mean Exxam Score
A course coordinator is examining scores on an exam. In
a representative sample of 35 students, the mean exxam score was
87.9 points with a standard deviation of 6.8 points.
A. Use Minitab Express to determine if there is evidence
that the mean exxam score is different from 90 points in the
population of all test takers. Use the five-step hypothesis testing
procedure outlined below. Remember to include all relevant Minitab
Express output and...

Question Set 2: Mean Test Score A course coordinator is
examining scores on an exam. In a representative sample of 35
students, the mean Test score was 87.9 points with a standard
deviation of 6.8 points. A. Use Minitab Express to determine if
there is evidence that the mean Test score is different from 90
points in the population of all test takers. Use the five-step
hypothesis testing procedure outlined below. Remember to include
all relevant Minitab Express output and...

Reminder: The standard error is computed differently for
a two sample proportion confidence interval and a two sample
proportion hypothesis test.
At the beginning of the Summer 2018 semester, students
enrolled in World Campus and University Park WEB sections of STAT
200 completed a survey. Data concerning their primary campus and
their employment status are presented in the table
below.
Primary Campus
Total
World Campus
University Park
Employed Full-Time
Yes
185
70
255
No
81
341
422
Total
266
411...

Round any numerical answers to 3 decimal places.
1.) A weight loss study measures each participant’s
weight before the study and then 12 weeks into the study. A sample
of 31 participants enrolled in the study and the mean difference in
their weights (computed before – after) was found to be 4.1 pounds
with a standard deviation of 3.2 pounds. In Minitab Express,
conduct a paired means t-test to determine if there is evidence
that the participants on average lost...

A local newspaper claims in an article that the average income
for all handymen in the city is more than $5200 per month. A sample
of 20 randomly selected handymen had the mean income of $5300 with
the standard deviation of $150 per month. Test the claim made by
the local newspaper at α = 0.05 .
For each question you need to find the following
a) < 1 point > Write the given .
Step 1
b) < 2...

MATH125: Unit 1 Individual Project Answer Form
Mathematical Modeling and Problem Solving
ALL questions below regarding SENDING A PACKAGE and PAINTING A
BEDROOM must be answered. Show ALL step-by-step calculations, round
all of your final answers correctly, and include the units of
measurement. Submit this modified Answer Form in the Unit 1 IP
Submissions area.
All commonly used formulas for geometric objects are really
mathematical models of the characteristics of physical objects. For
example, a basketball, because it is a...

1)Adding an outlier in a scatterplot will do which of the
following to the correlation coefficient? Explain
a) Increase the correlation coefficient
b) Decrease the correlation coefficient
c) Change the correlation coefficient from positive to
negative
d) Change the correlation coefficient from negative to
positive
e) All options above are possible
2) When the correlation coefficient is close to +1, it
indicates. Please explain
a) changes in one variable cause changes in the other, but we
don't know which one...

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