Question

In 2017, 965 students registered for a course. Explain how you will use the random number table to select a simple random sample of 20 students.
Start from digit one of row 6.


Fill in the blanks
1. Bar chart is normally used for ___________ data.
2. Pie chart presents ___________ data.
3. A ____________________ is used to describe the relationship between two categorical variables.
4. A ___________ histogram is one with a single peak.
5. A ___________ histogram is one with two peaks.
6. Observations measured at the same point in time across individual units are called _______________ data.
7. Observations measured at successive points in time on a single unit are called _______________ data.

Answer 1

1) A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars .A bar graph is used when you have qualitative data.so our answer is categorical data.

2)Pie charts are generally used to show percentage or proportional data and usually the percentage represented by each category is provided next to the corresponding slice of pie.

3) A contingency table or cross tabulation is used to describe the relationship between two categorical variables.

4) a unimodal histogram is one with a single peak.The single peak indicates that the distribution is unimodal. The highest peak of thehistogram represents the location of the mode of the data set. The mode is the data value that occurs the most often in a data set.

5) A bimodal histogram is one with two peaks.

6)Cross-sectional data, or a cross section of a study population, in statistics and econometrics is a type ofdata collected by observing many subjects (such as individuals, firms, countries, or regions) at the one point or period of time

so answer is cross sectional data.

7)A set of observations on the values that a variable takes at different times. is time series data.

so answer is time series data.