R Programming for Statistics and Data Science - Distributions

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Mathematics
•
9th - 10th Grade
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary focus of inferential statistics?
Describing data using graphs
Predicting population values from sample data
Calculating the mean of a dataset
Organizing data into tables
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which distribution is characterized by symmetry around the mean?
Bimodal distribution
Uniform distribution
Skewed distribution
Normal distribution
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is a probability distribution different from a frequency distribution?
It shows how often scores occur
It represents data visually
It is always symmetrical
It describes the likelihood of scores occurring
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example of unicorn sightings, what does a higher frequency in certain months suggest?
The sightings are random
Unicorns are equally likely to appear in all months
The data is incorrect
Unicorns are more common in those months
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key feature of the standard normal distribution?
It is used only for small datasets
It has a mean of 1
It has a mean of 0 and a standard deviation of 1
It is skewed to the right
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are Z scores important in statistics?
They are only used in descriptive statistics
They are used to calculate the mean
They help in organizing data
They allow comparison of scores from different distributions
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of standardizing a variable?
To decrease its standard deviation
To increase its mean
To convert it into a standard normal distribution
To make it more complex
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