Quiz 1 Please work on this Quiz and submit the answers in the attached excel file 1. To rate TV shows, phone surveys are sometimes used. Such a survey might record several variables, some of which are listed below. Which of these variables is categorical?
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Terminology Review Discrete Random Variables
A subset of the sample space is called an event.
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The sample space has 54 outcomes and A has 15 ou
Quiz3 (This Quiz will contribute 10 points in your assignment grades) Please remember to keep this Quiz visible at the time you are submitting the answers. Use the following density curve to answer questions 1 3.
1. For this density curve, the third quart
Quiz 2 Please work on this Quiz and submit the answers in the Quiz2 slot in the Assessment Area. Use the following to answer questions 1 4.
A sample of 20 em ployees from the local Honda plant was obtained and the length of time (in months) worked was rec
7.The following data shows the time (in minutes) taken by the 9 employees of a
company to finish a job satisfaction survey.
17, 38, 46, 49, 51, 53, 58,59, 61
a) Find the mean of this data.
b) Find the median of this data. c) You discover t
7.The following data shows the time (in minutes) taken by the 9 employees of a
company to finish a job satisfaction survey.
17, 38, 46, 49, 51, 53, 58,59, 61
a) Find the mean of this data.
b) Find the median of this data.
Extra practice for Unit 5
1. Two fair dice are rolled. Find the probability that the sum of the dots facing up is a) 7 b) 11 c) 7 or 11
d) 10 given that both the dice have even number of dots facing up.
2. A small college has 1871 students. 140 students a
Summarizing a Numerical Data Set MEASURES OF CENTRAL TENDENCY AND SPREAD Mean: Mean is a measure of central tendency of a numerical data. It is calculated by adding all the values and dividing it by the total number of observations. Consider the following
Definitions and Terminologies We are going to study statistical methods to help us describe a data set, display a data set, and make inference from a data set. We may work with a data set that is already available or may collect data to understand the beh
Friends Opposite sex No difference Opposite sex No difference Opposite sex Same sex Same sex Same sex Opposite sex No difference Same sex No difference No difference Opposite sex Same sex Opposite sex Opposite sex Opposite sex No difference Same sex No di
89% of the people in a certain large region are right handed. 12 people are randomly selected from this population. Use the binomial distribution to find a) The probability handed. b) The probability handed. c) The probability d) The probability right han
% of Classes Student/Faculty Alumni School Under 20 Ratio Giving Rate Boston College 39 13 25 Brandeis University 68 8 33 Brown University 60 8 40 California Institute of Technology 65 3 46 Carnegie Mellon University 67 10 28 Case Western Reserve Univ. 52
Continuous Distributions
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Example 1:
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A copy of this table is posted under the file name "standard normal curve areas table."
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MONTGOMERY COLLEGE ROCKVILLE Department of Mathematics Spring 2012 Elements of Statistics MA116 Instructor Information: Atul N Roy Phone: 240-476-9641 Email: [email protected] Office: SE 217 Office Hours: TR 2:00-3:30 PM+ many by appointments
Let me know if you have any problems 1. The Columbus Zoo conducts a study to determine whether a household's income can be used to predict the amount of money the household will give to the zoo's annual fund drive. The response variable in this study is a