The Greatest Stats Show

Descriptive

100

Which graph is best suited for continuous data?

A) Pie chart

B) Bar chart

C) Histogram

D) Line graph

c) Histogram

200

Which measure of central tendancy is most affected by extreme values?

a) Median

b) Mode

c) Mean

d) Quartile

c) Mean

300

Standard deviation is the square root of

Variance

400

A perfectly symmetrical distribution will have:

A) Mean ≠ Median

B) Median ≠ Mode

C) Mean = Median = Mode

D) No mode

C) Mean = Median = Mode

500

What is mean?

It is the average of a dataset

Probabilities

100

if two events cannot occur together, they are called__

Mutually exclusive

200

Which of the following represents the sample space when a coin is tossed once?

A) {H}

B) {T}

C) {H, T}

D) {0, 1}

C) {H, T}

300

The sum of probabilities of all possible values of a discrete random variable is ___

1

400

Which distribution models the number of successes in fixed independent trials?

A) Normal

B) Poisson

C) Binomial

D) Uniform

c) Binomial

500

For a continuous random variable, the probability of a single point is ___

0

Sampling and Data collection

100

Data collected for the first time by the investigator is called ___

Primary data

200

What is sampling?

Sampling is the process of selecting a part of the population to represent the whole

300

Selecting every kth item from a list is called ___

Systematic sampling

400

Sampling error occurs because ___

Sample differs from population

500

Pilot surveys are conducted to ____

Test questionnaire design

Regression

100

The variable being predicted is called ___

dependent variable

200

in the equation y = a + b; b represents ___

slope

300

Which of the following measures the goodness of fit of a regression model?

A) Mean

B) Variance

C) Correlation coefficient

D) Standard deviation

 C) Correlation coefficient

400

The sum of residuals in a least squares regression is __

0

500

Homoscedasticity means:

A) Errors are correlated

B) Errors have constant variance

C) Errors are normally distributed

D) Errors are zero

B) Errors have constant variance

Inferential

100

Inferential statistics mainly deals with:

A) Collecting data

B) Summarizing data

C) Drawing conclusions about a population

D) Organizing data

C) Drawing conclusions about a population

200

A numerical characteristics of a population is called ___

Parameter

300

What is the most commonly used confidence level

95%

400

Null hypothesis is denoted by ___

H0

500

Which test is used to test independence of attributes?

chi-square test