Psyc 211 - Quiz 1

Which of the following best describes the concept of random sampling?

• All members of the population are equally likely to be included in the sample.

• The sample is drawn based on the convenience and ease of access to participants.

• The sample is selected to reflect the specific characteristics of the larger population.

• The sample is made up of volunteers who choose to participate in the study.

It allows you to make predictions and draw conclusions about a population based on a sample of data from that population."

Which term is being defined in the statement above?

• Random Sampling

• Descriptive Statistics

• Inferential Statistics

• Central Tendency

You have a dataset that contains the ages of individuals from 18 to 65 years old. You want to understand the distribution of ages in the dataset. Which type of graph is best suited for this purpose?

• Scatterplot

• Bar Chart

• Histogram

• Pie Chart

You have a dataset that shows the monthly sales of five different products in a store. You want to compare the sales of these products side-by-side for a specific month. Which type of graph is best suited for this purpose?

• Scatterplot

• Bar Chart

• Histogram

• Pie Chart

You have a dataset that contains the exam scores of students in a class, ranging from 0 to 100. You want to understand the frequency of scores within various ranges. Which type of graph is best suited for this purpose?

• Scatterplot

• Bar Chart

• Histogram

• Pie Chart

You have a dataset containing the ages and corresponding monthly income of a group of individuals. You want to investigate the relationship between age and monthly income. Which type of graph is best suited for this purpose?

• Scatterplot

• Bar Chart

• Histogram

• Pie Chart

We surveyed 150 UCR undergraduate students about the number of suicidal thoughts they've had in the past month and plotted the data on a histogram. Based on the nature of the data, what shape do you expect the histogram to take?

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We surveyed 150 UCR undergraduate students about the stress level they've had in the past month and plotted the data on a histogram. The students come from both highly stressful majors like engineering and less stressful majors like liberal arts. Based on the nature of the data, what shape do you expect the histogram to take?

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We examined all the countries in the world, gathering data on two variables: life expectancy and GDP per capita. We then plotted a scatter plot that shows an increasing trend between these variables. What can you infer from this plot?

• Countries with higher GDP per capita tend to have higher life expectancy.

• Countries with higher GDP per capita tend to have lower life expectancy.

• There is no relationship between GDP per capita and life expectancy.

• Life expectancy causes an increase in GDP per capita.

John is a risk-averse individual who is currently job-hunting. He wants to ensure that he can make a stable living to support his family and cover all expenses like rent and utilities. He is comparing two companies, Company A and Company B, based on their offered salaries to employees. He looks at both the mean and the variance of the salaries.

• Company with a higher mean salary and higher variance

• Company with a higher mean salary and lower variance

• Company with a lower mean salary and higher variance

• Company with a lower mean salary and lower variance