Question

2a. If the mean salary is $50,000 and the standard deviation is $3,200, what is the salary range of the middle 70 % of the workforce if the salaries are normally distributed? Draw a sketch and write your answer in a complete sentence. Also please use Table A-2. (10 points)

2b. Determine the salary that separates the bottom 5.75% and the salary that separates the top 5.75% of the workforce. Draw a sketch and write your answer in a complete sentence. Also please use Table A-2. (10 points)

Answer #1

1.The capacity of an elevator will be exceeded if
10 people have mean weights greater than 167 pounds. Suppose the
people have weights that are normally distributed with a mean of
165 pounds with a standard deviation of 21 pounds. Please
write your answer in a complete sentence and draw a
sketch. Use Table A-2.
Find the probability that if a person is randomly chosen his
weight will be greater than 170 pounds.
Find the probability that 10 randomly...

1. The capacity of an elevator will be exceeded if 10 people
have mean weights greater than 167 pounds. Suppose the people have
weights that are normally distributed with a mean of 175 pounds
with a standard deviation of 25 pounds. (15 points) Please write
your answer in a complete sentence and draw a sketch. Use Table
A-2.
a. Find the probability that if a person is randomly chosen his
weight will be greater than 170 pounds.
b. Find the...

Assume I give a test with a mean score of 84 and a standard
deviation of 10. Draw a sketch of a normal distribution centered at
the mean of 84 and divide it into 5 regions based on the following
grades: The top 10% of scores receive an A The next 20% of scores
receive a B The middle 40% of scores receive a C The next 20% of
scores receive a D The bottom 10% of scores receive an...

The distribution of hours of sleep per week night, among college
students, is found to be Normally distributed, with a mean of 7.5
hours and a standard deviation of 0.75 hours (or 45 minutes). Use
this information and the 68– 95– 99.7 rule to answer the following
questions.
A) Draw the distribution, show where the mean is and show on the
x-axis the points that correspond to one and two standard
deviations from the mean
B) What range contains the...

What the mean and Standard Deviation
(SD) of the Close column in your data set?
c) If a person bought 1 share of
Google stock within the last year, what is the probability that the
stock on that day closed at less than the mean for that year? Hint:
You do not want to calculate the mean to answer this one. The
probability would be the same for any normal distribution.
(5 points) 0.5
If a person bought 1 share...

1. Assume that adults have IQ scores that are normally
distributed with a mean of 104.3 and a standard deviation of 23.8.
Find the probability that a randomly selected adult has an IQ
greater than 147.0. The probability that a randomly selected adult
from this group has an IQ greater than 147.0 is..
2. Engineers want to design seats in commercial aircraft so that
they are wide enough to fit 90% of all males. (Accommodating 100%
of males would require...

Calculate the mean, median, mode, variance (population) and
standard deviation (sample) for the following test grades: 65, 60,
67, 71, 75, 80, 65 Use this information to answer questions #1-4.
Question 1 (0.5 points) Saved The mode is: Question 1 options: 65
60 There is no modal category 75 71 Question 2 (0.5 points) Saved
The median is: Question 2 options: 67 65 80 66 None of the above
Question 3 (0.5 points) What is the approximate population variance
for...

THIS IS THE GENERAL EQUILIBRIUM PROBLEM THAT I PROMISED. YOU
FIRST SOLVE FOR THE INITIAL EQUILIBRIUM AS POINT A. WE CONSIDER TWO
DIFFERENT AND SEPARATE SHOCKS (I CALL THEM SCENARIOS). THE FIRST
SHOCK IS TO THE IS CURVE, THE SECOND SHOCK IS A ‘LM’ SHOCK. AGAIN,
WE CONSIDER THESE SHOCKS SEPARATELY SO THAT AFTER YOU COMPLETE
SCENARIO 1 (THE IS SHOCK), WE GO BACK TO THE ORIGINAL CONDITIONS
AND CONSIDER THE SECOND SCENARIO WHICH IS THE ‘LM’ SHOCK.
Consider the...

5. In general, when
performing Chi-square (goodness-of-fit) on a set of data, what does
it mean to fail to reject your null hypothesis? That is,
what does it tell you about your data? ____________
__________________________________________________________________________________________
6. Suppose you must reject
your null hypothesis. What would that mean about your
experimental hypothesis?
_______________________________________________________________________________
7a. Based on the
c2value, the p-value is determined. What does
a p-value tell you? ______________
__________________________________________________________________________________________
7b. As
c2 increases, the p-value
____________________.
7c. Assume that
Chi-square analysis of experimental data gives a p-value of
0.04. What...

1.
The country of Dystopia is composed of 500 workers and
100 managers
Workers earn $100 and pay $10 in taxes a
day.
Managers earn $1,000 a day in salary, bonuses and
performance pay.
They also own investments that accrue around $300 a day
in dividends, interests and capital gains. Managers also pay around
$200 a day in taxes.
Dystopia provides free health care and housing to all
its residents, of $40/day in value
Part a) Calculate the net national...

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