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In a survey of 302 registered voters, 167 of them wished to see Mayor Waffleskate
lose her next election. Find a point estimate for the proportion of registered voters
who wish to see M
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The following data represent the ice cream flavor choices of 20 diners at a college
cafeteria.
Which flavor ice cream is the mode?
Selectone:
A.Moose Tracks
B.Chocolate
C.Chocolate
D.Rocky
Chi
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Let A, B and C be independent events with P(A) = 0.6, P(B) = 0.3, andP(C) = 0.2.
Find P(A and B and C).
Select one:
A. 0.036
B. 0.033
C. 0.18
D. 0.9
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The correct answer is: 0.036
Unit 3
If X is a normally distributed random variable with mean and standard
deviation , then
P(a<X<b)=P(a<Z<b)P(a<X<b)=P(a<Z<b)
where Z denotes a standard normal random variable. a can be any decimal
number or ; b can be any decimal number or .
Probabili
Unit 2
Symmetrical outcomes: any given probability. Example toss a coin into the air, chance it will be
heads or tails.
Relative frequencies: what we would expect from the proportion of tosses. The more tosses
thrown, the closer it becomes to
Probability
Definitions
A population is any specific collection of objects of interest. A sample is any subset or
subcollection of the population, including the case that the sample consists of the whole
population, in which case it is termed a census.
A measurement
Unit 4
You estimate population parameters from sample statistics
The proportion of a .63 is a statistic and point estimate because it is the proportion obtained
from the sample and an estimate of the population proporotion
This value of 0.53 is called a p
Unit 4
You estimate population parameters from sample statistics
The proportion of a .63 is a statistic and point estimate because it is the proportion obtained
from the sample and an estimate of the population proporotion
This value of 0.53 is called a p