What is the cumulative frequency of a data set?

The sum of the frequencies of a class and all previous classes

What is a random variable ?

A variable that represents outcome of a probability experiment

What does conditional probability mean?

Probability of an event occuring that another event has already occured

What is the frequency distribution of a data set?

Data entries with a count of the number entries in each class

Which of the following describes a discrete random variable?

It has a finite or countable number of possible outcomes

What is a permutation?

An ordered arrangement of objects (n!)

What is a normal distribution?

A bell shaped and symmetrical, where mean, median, and mode are equal

What is the definition of Statistics?

The science of collecting, organizing, analyzing, and interpreting data

Which of the following is a property of normal distribution?

The mean, median, and mode are equal

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Statistics Review by Diana and Julissa P.5

20 termsStudBud Administration1 play

This is 20- question quiz covers key vocabulary terms and formulas from Chapter 1 to 5 of Statistics. To help review essential concepts such as frequency distributions, central tendency measures, variability, and graph data.

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

1
What is the standard score (z-score) formula
z= (x - μ) / x
z= (x - μ) / N
z= (x - μ) / σ
z= (x - μ) / n
2
What is the name of this formula?
Permutation
Combination
Addition Rule
Mutually exclusive
3
What is the name of this formula ?
Exclusive event
Standard Deviation
Combination
Multiplication rule for dependent event
4
What is the cumulative frequency of a data set?
The number of classes in a frequency distribution
The frequency of a single data entry
The frequency of the class with the highest
The sum of the frequencies of a class and all previous classes
5
What is a random variable ?
A variable that always take the same value
A fixed variable in an experiment
A variable that represents outcome of a probability experiment
A variable that can only take on negative values
6
What does conditional probability mean?
Two events are independent one event does not affect the other event
Probability of an event occuring that another event has already occured
They cannot occur at the same time
7
What is the formula for the mean of a discrete random variable
μ = Σ xP(x).
∑ x² * P(X = x) - μ²
E[X] = ∫-∞^∞ x*f(x) dx
σ = √Var(X)
8
What is the frequency distribution of a data set?
Data entries with a count of the number entries in each class
A type of graph used for categorical data
A table showing the counts of data in different classes
The measure of central tendency
9
What is the name of this formula called?
Random Variable
Standard deviation
Continuous
Varianace
10
What level of measurement is used when data can be ordered but a difference between the data entries are not meaningful?
Interval
Ordinal
Ratio
Nominal
11
Which of the following describes a discrete random variable?
It can take on any real number
It has a finite or countable number of possible outcomes
It can take on an infinite number of values within a given range
It is used for measured data
12
In inferential statistics, what is typically used to draw conclusions about a population from a sample
Cluster sampling
Probability
Descriptive statistics
Sampling
13
What is the formula for calculating a z-score?
μ = Σ xP(x).
x = μ + zσ,
z = (x - μ) / σ
z = μ +σ
14
What is a permutation?
An ordered arrangement of objects (n!)
A selection of objects from a group without regard to order
15
What is a normal distribution?
A distribution that is uniform and linear
A distribution with any shape and equal mean and s.d
A bell shaped and symmetrical, where mean, median, and mode are equal
A distribution with a skewed shape where mean is different from the median
16
What is the formula for calculating a z-score to an x- value?
x = μ + zσ
x = μ + z*σ
x = Z*μ
x = μ - zσ
17
What is this formula called?
Mean
Cumulative Frequency
Population Mean
Sample Mean
18
What is the definition of Statistics?
The process of counting births and deaths
The study of numerical information
A way to collect data through surveys
The science of collecting, organizing, analyzing, and interpreting data
19
What does a parameter describe?
A sample characteristic
a population characteristic
a group of random variables
the mean of a data set
20
Which of the following is a property of normal distribution?
The normal curve is not symmetrical
The total area under the curve is greater than 1
The mean, median, and mode are equal
The normal curve touches the x-axis at extreme values

Statistics Review by Diana and Julissa P.5 Flashcards | StudBud

Statistics Review by Diana and Julissa P.5

20 termsStudBud Administration1 play

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

1
What is the standard score (z-score) formula
z= (x - μ) / x
z= (x - μ) / N
z= (x - μ) / σ
z= (x - μ) / n
2
What is the name of this formula?
Permutation
Combination
Addition Rule
Mutually exclusive
3
What is the name of this formula ?
Exclusive event
Standard Deviation
Combination
Multiplication rule for dependent event
4
What is the cumulative frequency of a data set?
The number of classes in a frequency distribution
The frequency of a single data entry
The frequency of the class with the highest
The sum of the frequencies of a class and all previous classes
5
What is a random variable ?
A variable that always take the same value
A fixed variable in an experiment
A variable that represents outcome of a probability experiment
A variable that can only take on negative values
6
What does conditional probability mean?
Two events are independent one event does not affect the other event
Probability of an event occuring that another event has already occured
They cannot occur at the same time
7
What is the formula for the mean of a discrete random variable
μ = Σ xP(x).
∑ x² * P(X = x) - μ²
E[X] = ∫-∞^∞ x*f(x) dx
σ = √Var(X)
8
What is the frequency distribution of a data set?
Data entries with a count of the number entries in each class
A type of graph used for categorical data
A table showing the counts of data in different classes
The measure of central tendency
9
What is the name of this formula called?
Random Variable
Standard deviation
Continuous
Varianace
10
What level of measurement is used when data can be ordered but a difference between the data entries are not meaningful?
Interval
Ordinal
Ratio
Nominal
11
Which of the following describes a discrete random variable?
It can take on any real number
It has a finite or countable number of possible outcomes
It can take on an infinite number of values within a given range
It is used for measured data
12
In inferential statistics, what is typically used to draw conclusions about a population from a sample
Cluster sampling
Probability
Descriptive statistics
Sampling
13
What is the formula for calculating a z-score?
μ = Σ xP(x).
x = μ + zσ,
z = (x - μ) / σ
z = μ +σ
14
What is a permutation?
An ordered arrangement of objects (n!)
A selection of objects from a group without regard to order
15
What is a normal distribution?
A distribution that is uniform and linear
A distribution with any shape and equal mean and s.d
A bell shaped and symmetrical, where mean, median, and mode are equal
A distribution with a skewed shape where mean is different from the median
16
What is the formula for calculating a z-score to an x- value?
x = μ + zσ
x = μ + z*σ
x = Z*μ
x = μ - zσ
17
What is this formula called?
Mean
Cumulative Frequency
Population Mean
Sample Mean
18
What is the definition of Statistics?
The process of counting births and deaths
The study of numerical information
A way to collect data through surveys
The science of collecting, organizing, analyzing, and interpreting data
19
What does a parameter describe?
A sample characteristic
a population characteristic
a group of random variables
the mean of a data set
20
Which of the following is a property of normal distribution?
The normal curve is not symmetrical
The total area under the curve is greater than 1
The mean, median, and mode are equal
The normal curve touches the x-axis at extreme values