Quiz #4 MA2025 EOL61
Professor Ken Miller
Indiana Tech
Quiz 4
Question 1: The length of human pregnancies from conception to birth varies according
to a distribution that is approximately Normal with a mean of 266 days and standard
deviation of 16 days.
a
B) The main features of the distribution in this chart for 1950 is that there is over 3% more children under 10 than the next group with
the highest percent of U.S. citizens (20-29). After you notice the spike in children under 10 and the 10-19 age group,
Pamela Holocher
2.13
A. Yes, they do indicate which variable should be treated as the response. With the way it is
worded, they indicate that response would be the assets of the 10 largest online stock
brokerage.
C. For the first few points on the chart t
Pamela Holocher
2.13
A. Yes, they do indicate which variable should be treated as the response. With the way it is
worded, they indicate that response would be the assets of the 10 largest online stock
brokerage.
C. For the first few points on the chart t
sample size
sample size
Mean
Std dev
Confidence Coefficient
Level of significance
10
10
640
90
0.95
0.05
Margin of error
55.78
Point estimate
Lower limit
upper limit
640
584.22
695.78
67.8
60.9
66
sample size
Mean
Std dev
Confidence Coefficient
Level of s
Probability Cheatsheet v2.0
Compiled by William Chen (http:/wzchen.com) and Joe Blitzstein,
with contributions from Sebastian Chiu, Yuan Jiang, Yuqi Hou, and
Jessy Hwang. Material based on Joe Blitzsteins (@stat110) lectures
(http:/stat110.net) and Blitzs
MA 2025: Statistical
Problem-Solving
Lecture 2: Describing Data with
Graphs
MA 2025
Objectives
Types of variables
Ways to chart categorical data
Bar graphs
Pie charts
Ways to chart quantitative data
Histograms
Stemplots
Timeplots
MA 2025
Important Terms :
MA 2025: Statistical
Problem-Solving
Lecture 3: Describing Data with
Numbers
MA 2025
Objectives
Measures of center: mean, median
Comparing mean and median
Measures of spread: quartiles, standard
deviation
Five-number summary and boxplots
Choosing measures
MA 2025: Statistical
Problem-Solving
Lecture 1: Overview
MA 2025
Syllabus Grading Events
Discussion Board
Exercises
Applications
Quizzes
Comprehensive Final
MA 2025
Syllabus Grading Events
Grading Event
MA 2025
Percentage of Final Grade
Discussion Board
1
Tamika Jones
Quiz #1 MA2025 EOL61
Professor Ken Miller
Indiana Tech
Question 1: The following data set shows the amount of time consumers have to wait on hold, in
minutes, before talking to a customer service representative. Compute by hand the mean and
s
Tamika Jones
Quiz #3 MA2025 EOL61
Professor Ken Miller
Indiana Tech
Quiz #3
You will need to use both Word and Excel to complete this quiz. Make sure you put all your
answers and how you arrived at them in the Word document, which is where I will make
com
Tamika Jones
Quiz #2 MA2025 EOL61
Professor Ken Miller
Indiana Tech
Quiz #2
Enter the data set into excel. Using excel perform a least squares regression on the data
set. Use Sodium as the y variable and Calories as the x variable. Make a scatter plot
wit
C)The most important changes in the U.S. age distribution projected for the years between 1950 and 2075 is that the under 10 category
will start to slowdown in growth while the other categories begin to grow in numbers. Also, there will be more citizens l