BStat Prep: Statistics
The symbol ∑ is used to denote
sum of data
To compute the standard deviation, one _______.
takes the square root of variance
The Mean Absolute Deviation is ___________.
the average of all absolute deviations
According to the data in this video, which breed of dog is not within one standard deviation of the mean height?
Doberman
The Mean of a distribution is always a value from the distribution
False
In order to compute variance, ______ needs to be computed.
Mean
Is the set of all the footballs in the world a sample or population?
Population
Which one has more data points?
Population
Variables of type Ratio are the most complete
True
Statistics for a sample are denoted by _____.
x̄, s2
Simply stated, Histograms are a plot of data bins and the number of data points in each of them.
True
When there are an odd number of values in a distribution, the Median is the centrally located value when all the values are in ascending order.
True
The mean of a sample and standard deviation of a population are denoted by
x̄, σ
Given the sample data set 4, 5, 6, what is the variance?
1
In this data set, 1, 2, 3, 4, 4, the mode is
4
What is the Mean Absolute Deviation of the data set 7, 10, 14, and 20?
4.25
How many areas of the MS Excel interface were discussed in the video?
5
In the video example, which dog breed has the largest variation?
Doberman
In this histogram, the height of a column is determined by the value of a student's test score.
False
Where does one change the format of a cell, such as adding color or changing font style?
Ribbon and Worksheet area
There are ten sections of a math course at a university. One section is randomly chosen for a survey about calculator preferences. The group of students in this section is a ____.
Sample
A sample set consists of randomly selected points from a population.
True
Discrete data can only take finite values.
True
Hypothesis testing is about determining the likelihood of a population statistic being true.
True
Absolute deviations are _____________.
always positive
When you measure the weight of a person, the data is ____.
continuous
When you roll two dice, the data generated is ___.
discrete.
Given the null hypothesis that the mean height of Dobermans is 26 inches, an appropriate altnerate hypothesis for this two-sided distribution will be ___.
mean height is not equal to 26 inches
One of the things you can do with the Status Bar is:
rename the tab
Measures of Central Tendency are representative of a central location in the distribution
True
Nominal data represent categories or labels, such as male and female.
True
Ordinal scale is an ordering of the nominal variables.
True