The average score for a class of 30 students was 75. The 12 male students in the class averaged 72. The 18 female students in the class averaged:

The number of newspapers sold daily at Kim's Convenience is bell-shaped with a mean of 63, and a variance of 121. If Kim wants only a 2.5% chance of being sold out, how many newspapers should be ordered each day? Newspapers come in in bundles of 12 so you will have to round up your answer. (Hint: Use the Empirical Rule)

Last year a repair shop paid each of its five mechanics $50,000, two supervisors $65,000 each, and the master mechanic/owner $270,000. The number of employees earning more than the median salary is:

In an accounting firm, the weekly incomes of the articling students have a mean of $1800, a standard deviation is $360, and are normally distributed. What is the z-score for an income of $2340/week?

Group of answer choices

Your investment portfolio over the past four years has had returns of 7%, 11%, (4%), and 16%. Your mean return is:

Group of answer choices

A time series plot is represented as a

Group of answer choices

boxplot.

frequency graph.

dot plot

line chart.

Adding the grid lines in a graph

Group of answer choices

increases the data-ink ratio.

decreases the data-ink ratio.

increases the non-data-ink ratio.

does not affect the data-ink ratio.

A chart that uses a coloured cell shading to show ranges of data series values is called a

Group of answer choices

heatmap

sparkline

trendline

treemap

bubble chart.

Which of the following would not be used to display the frequency distribution of nominal data:

Group of answer choices

Bar chart

Clustered bar chart

Pie chart

Histogram

Which of the following causes sampling error?

Group of answer choices

Taking a random sample from a population instead of studying the entire population.

Making a mistake while collecting the data.

Nonresponse bias.

All of these choices are true.

Professor Marshall maintains a classlist/gradebook for FINE6200 in an Excel file. In a survey, students provided their birth date from which each student's age is calculated. Which type of data is this age data?

Group of answer choices

nominal.

ordinal data.

interval data.

ratio data.

Which of the following types of samples is almost always biased?

Group of answer choices

Convenience samples.

Systematic random samples.

Stratified random samples.

Cluster samples.

Professor Marshall maintains a classlist/gradebook for FINE6200 in an Excel file. In a survey, students provided their birth date from which each student's age is calculated. Which type of data is this age data?

Group of answer choices

nominal.

ordinal data.

interval data.

ratio data.