Descriptive statistics part 1

In finding the ________ we need to sort our data

• Mean

• Median

• Mode

• Meaures of center

Which is the most accurate used for measure of center between the three

• Mean

• Median

• Mode

Which of the following represents mean

•  $\frac{sum\ x}{n}$  

•  $\frac{n}{2}$  

•  $nx^2$  

Age, gender and marital status are

• categorical

• qualitative

• quantitative

Grade, rating in survey and position are examples of

• nominal data

• ordinal data

• categorical

• qualitative

Color, car make and marital status are examples of

• nominal

• ordinal

• categorical

• qualitative

Temperature, average rainfall and amount of oxygen in a cylinder are examples of

• discrete

• continous

• quantitative

• categorical

Age in years, speed in kilometer and number of NanoDegree receipents are example of

• discrete

• continous

• quantitative

• nominal

In notation, lower case x is

• Random variable

• Observed variable

• None of the options

• Just a random alphabet

Consider the following data x1 = 30, x2 = 23, x3 = 4, x4 = 11, x5 = 18, x6 = 3, x7 = 34. What notation will best represent (23+4+11+18) / 3

•  $\sum_x^y$  

•  $\sum_{i=1}^7x_i$  

•  $\sum_{x=2}^5x_i$  

• None of the options