Practice Normal Distribution (5.1) - Introduction to Statistics

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a normal distribution?
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Think about the bell-shaped curve.
Question 2.
What does the 68-95-99.7 rule state?
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Remember how much data is around the mean.
3Question 3.
What is the shape of a normal distribution curve?
- Square
- Bell-shaped
- Triangle
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Think of how it appears on a graph.
4Question 4.
In a normal distribution, the mean, median, and mode are?
- True
- False
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Consider the properties of the distribution.
Question 5.
Given a normal distribution with a mean of 50 and a standard deviation of 5, calculate the probability of a data point being less than 55.
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Use the Z-score formula and Z-table to find your answer.
Question 6.
In an experiment, the height of plants is normally distributed with a mean of 30 inches and a standard deviation of 6 inches. If you want to find the height threshold for the top 10% tallest plants, what Z-score do you need and what height corresponds to this Z-score?
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Look up the Z-score for the top 10% and apply it correctly.

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