Difference between Sample and Population in Statistics

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What is the main difference between a sample and a population?

A population refers to a subset of the sample, while a sample describes the whole population.

A sample is the entire set of outcomes, while a population is a subset of the sample.

A sample is used for descriptive statistics, while a population is used for inferential statistics.

A population includes all outcomes, while a sample is just a subset of those outcomes. (correct)

Which type of statistics is used when stating 'By 2040 at least 3.5 billion people will run short of water'?

Prescriptive statistics

Descriptive statistics (correct)

Inferential statistics

Predictive statistics

What level of measurement would 'Rankings of golfers in a tournament' fall under?

Ratio-level

Ordinal-level (correct)

Interval-level

Nominal-level

'Categories of magazines in a physician’s office' belong to which level of measurement?

Nominal-Level Signup and view all the answers

'Marital status of nurses in a hospital' would be classified as which type of variable?

Qualitative Signup and view all the answers

'Time it takes to run a marathon' is an example of what type of variable?

Quantitative Signup and view all the answers

What is the mean undergraduate GPA for the top-ranked medical schools?

3.714 Signup and view all the answers

What is the median number of short-term parking spaces at the airports?

1479 Signup and view all the answers

In the undergraduate GPA data, what is the mode?

3.80 Signup and view all the answers

What is the mid-range of the number of short-term parking spaces at the airports?

$rac{1479 + 9822}{2}$ Signup and view all the answers

Which city has more variable number of stories in the tallest buildings according to the data provided?

Accra Signup and view all the answers

Based on the waiting times provided, which group of patients' waiting times is more variable?

Discharged patients Signup and view all the answers

What is the sample variance for the amount of Ghanaian auto sales for the 6 years shown in the data?

1.13 million dollars Signup and view all the answers

If the mean waiting time for admitted patients changes to 90.2 minutes with a standard deviation of 8.5 minutes, how would this affect the variability compared to discharged patients?

Discharged patients become more variable Signup and view all the answers

If Kumasi had a standard deviation of 5.7 for the number of stories in its tallest buildings, what effect would this have on the comparison with Accra?

Accra is still more variable Signup and view all the answers

If one more year of auto sales data had a value of 16.3 million dollars, how would this affect the sample variance compared to before?

Sample variance increases Signup and view all the answers

Which of the following variables can be classified as qualitative?

Colors of automobiles in a parking lot Signup and view all the answers

Which measure of central tendency should be used when there is an extreme value in the data set?

Median Signup and view all the answers

What type of variable is the number of students making appointments with a math tutor each day?

Discrete Signup and view all the answers

For which situation is the mean the most appropriate measure of central tendency?

When further statistical computations are needed Signup and view all the answers

If the sum of five values is 320 and the mean is 64, what is the sum of these values?

$380$ Signup and view all the answers

In a set of five values where four are given as 6, 10, 7, and 12, if the mean of all five values is 8.2, what is the fifth value?

$6$ Signup and view all the answers

What is the mode of the compensation costs for production workers in U.S. dollars?

5 million dollars Signup and view all the answers

What is the modal class for the compensation costs of production workers?

22.52–27.52 Signup and view all the answers

What is the mean hourly compensation cost for production workers in U.S. dollars?

$17.68 Signup and view all the answers

Which class has the highest frequency for the production workers' compensation costs?

17.51–22.51 with a frequency of 7 Signup and view all the answers

What is the mode of the compensation costs in U.S. dollars?

$17.51–22.51 with a frequency of 7 Signup and view all the answers

How many modal classes are there for the compensation costs of production workers?

2 Signup and view all the answers