Practice Common Distributions (5) - Introduction to Statistics

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What shape does the normal distribution take?
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Think about the symmetry and average.
Question 2.
What are the two outcomes in a binomial distribution?
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Consider scenarios like flipping a coin.
3Question 3.
Which of the following is a characteristic of the normal distribution?
- Flat shape
- Bell shape
- Skewed shape
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Visualize the distribution curve.
4Question 4.
True or False: The binomial distribution can have more than two outcomes.
- True
- False
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Think about the meaning of 'bi' in binomial.
Question 5.
A factory knows the average number of defective items in a batch of 100 is 5. If the defects follow a normal distribution, what is the probability of having 3 defects?
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Calculate using mean and standard deviation.
Question 6.
A call center receives an average of 4 calls per hour. What is the probability of receiving exactly 5 calls in the next hour?
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Remember: P(X=k) = (lambda^k * e^(-lambda)) / k!.

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