Straighter line Introduction to Statistics Quizzes With Correct Solutions Graded A+ Pass 100%
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Course
Introduction to Statistics
Institution
Introduction To Statistics
1. Discrete random variable
2. Continuous random variable - CORRECT ANSWER -1. things we count
2. things we measure
1. Parameter
2. Statistic - CORRECT ANSWER -1. Number that describes the population
2. Number that is computed from the sample
1. Usual
2. Unusual - CORRECT ANSWER -1. Withi...
Straighter line Introduction to Statistics Quizzes With
Correct Solutions Graded A+ Pass 100%
1. Discrete random variable
2. Continuous random variable - CORRECT ANSWER ✔✔ -1. things we count
2. things we measure
1. Parameter
2. Statistic - CORRECT ANSWER ✔✔ -1. Number that describes the population
2. Number that is computed from the sample
1. Usual
2. Unusual - CORRECT ANSWER ✔✔ -1. Within two standards deviations of the mean
2. More than two standard deviations above or below the mean
3 Types of inference in this course - CORRECT ANSWER ✔✔ -Point estimation
Interval Estimation
Hypothesis Testing
Association (does/does not) imply causation. - CORRECT ANSWER ✔✔ -Does not
Binomial Experiment - CORRECT ANSWER ✔✔ -1. a fixed number of trials (notation: n trials)
2. each trial must be independent of the others
3. each trial has two possible outcomes, called "success" (the outcome of interest) and "failure"
, 4. there is a constant probability (p) of success for each trial, the complement of which is the
probability (1 - p) of failure
Binomials
The Number of outcomes with x successes out of n trials (formula) - CORRECT ANSWER ✔✔
-[n!]/[x!*(n-x)!]
Categorical variable - CORRECT ANSWER ✔✔ -places individuals into one of several groups
Two types: nominal and ordinal
Center of a random variable distribution is measured by its - CORRECT ANSWER ✔✔ -mean
Cluster Sampling - CORRECT ANSWER ✔✔ -Used when the population is naturally divided
into groups. Take a random sample of clusters and use all individuals within those clusters as the
sample.
Conditional probability
P(B | A) - CORRECT ANSWER ✔✔ -the conditional probability of event B occurring given that
event A has occurred
P(B | A) = P(A and B) / P(A).
Confidence intervals for the population mean - CORRECT ANSWER ✔✔ -Xhat ± z∗⋅[σ/(√n)]
Experiment - CORRECT ANSWER ✔✔ -researchers "take control" of the values of the
explanatory variable because they want to see how changes in the value of the explanatory
variable affect the response variable
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