Intro to research
11 April 2017
Chapter Review 3 Chapter 9
To pinpoint the effect of the family meal time on academic outcomes and behavior,
Miller and his team also controlled for factors such as parental employment, televisionwatching,
The t-test allows researchers to test whether the difference between two group means in an
independent groups design is statistically significant. One example is when
Intro to Research
Topic A Way of Thinking
Content of Element Empiricism
Badeen, D. (2012). Bernard hodgson's trojan horse critique of neoclassical economics and the
second phase of the empiricist level of analysis.
Junk in the
Rachel Janina Tandingan
MATHR105 T/TH 9:00 am
15 May 2016
Nowadays many college students dont really have the time to eat. We usually grab the fastest
meal we could devour. For my stats project, I wanted to figure out how mu
STATS T/TH 9 AM CLASS
19 April 2016
Part 1 One Sample Proportion
For our one sample proportion, we asked a group of students at Oxnard College if they had a Twitter,
Instagram, or a Faceboo
Republican Candidates to choose.
Chris Cristie :1.09 1
Mike Huckabee :1.09 /W
Jim Gilmore :1.09
John Kasioh :1.09
Marco Rubio : 2.17
Carly Fiorina :2.17
Rand Paul :2.17
Donald Trump : 5.43
"Es- NONE OF THE ABOVE : 55.43
Ted Cruz : 6.52
Jeb Bush :
Statistics Project #1
Descriptive Statistics: All About Us
Monday & Wednesday 9:00AM- 11:00AM
How many hours a week do you exercise?
The mean, median and mode of the data is as
1) For the following table, find the 95% confidence interval for the true
difference in the population proportions. Is there enough evidence to say
that there is a difference in the population proportions?
Chapter One Definitions
Okay, Okay. I know they are boring, but we need them. So here we go.
1.1 Basic Terms:
Statistics is the science of collecting, organizing, summarizing, and analyzing
information to draw conclusions or answer questions.
Chapter 1: Review - Solutions
1) For the following questions, decide whether the data collected would be
numerical or categorical:
a) How often do you workout per week?
b) What make is your car?
c) How tall are you?
Review Lab: Chapters 5-7
Graphs not included
1) If on a certain standardized test the scores are normally distributed with =
500 and = 25 find:
a) If you randomly select a person, what is the probability their score is
less than 460?
P(x < 460) = P(z < -1
Lab: 7.1 A
1) If we randomly select 25 values from a normal distribution with = 500 and
= 50, what is the probability that the average of those 25 values is greater
P( > 523) = P(z > 2.3)
= normalcdf(2.3, E99)
1) For the standard normal distribution find the z value with:
a) An area of .32 to the left
z = invNorm(.32 ) = -.47
b) An area of .41 to the right
z = invNorm(.59) = .23
2) For a normal distribution with = 80 and = 12, find:
1) If n = 20 and p = .3, find the probability of getting:
a) No more than 12 successes binomcdf(20,.3,12) = .999
b) Greater than 8 successes 1 binomcdf(20,.3,8) = .113
c) At least 9
1) Are the following probability distributions? If not, why not?
No, cant have a negative probability
2) If either of the above is a probabilit