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