Data Analysis and Survey Conclusions

The video tutorial explains how to use data from a random sample to make inferences about a population. It covers the concept of population versus sample data collection and demonstrates how to analyze survey data from a streaming service and a T-shirt color preference survey. The tutorial includes calculating percentages and making true or false inferences based on sample data.

What is the main reason for using a sample instead of the entire population when collecting data?

• It is more practical.

• It is more comprehensive.

• It is more accurate.

• It is less time-consuming.

What is an inference in the context of data analysis?

• A random guess.

• A statistical error.

• A conclusion based on evidence and reasoning.

• A hypothesis.

Why did the streaming service company choose to survey only 40 subscribers?

• To save time and resources.

• To ensure accuracy.

• To avoid bias.

• To include all possible opinions.

What percentage of the surveyed subscribers preferred cooking channels?

• 50%

• 40%

• 25%

• 10%

How is the percentage of subscribers who prefer sports channels calculated?

• By dividing the number of sports channel preferences by the total number of cooking channels.

• By dividing the number of sports channel preferences by the total number of surveyed subscribers.

• By dividing the number of sports channel preferences by the total number of channels.

• By dividing the number of sports channel preferences by the total number of sports channels.

What was the conclusion about the percentage of subscribers likely to watch sports channels?

• More than 40% are likely to watch.

• Exactly 40% are likely to watch.

• Less than 40% are likely to watch.

• None are likely to watch.

What percentage of the channels should be comedy according to the survey?

• 35%

• 30%

• 25%

• 22.5%

What was the ratio of sports channels to cooking channels in the survey?

• 4 to 3

• 1 to 1

• 3 to 2

• 2 to 3

What was the purpose of Coach Harris's survey at the dance competition?

• To evaluate the dance team's performance.

• To find out the preferred T-shirt colors.

• To determine the most popular dance moves.

• To assess the competition's popularity.

How many people preferred tie-dye T-shirts according to the survey?

• 125

• 55

• 81

• 135