Knowledge quiz

It’s time to put what you’ve learned to the test, get 8 questions right to pass this week.

1.

99.7% of students at a school are between 1.1m and 1.9m tall. What is the standard deviation if you assume that the data is normally distributed?

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2.

In a recent test, you scored 1.0 standard deviations above the average score attained, and the scores are normally distributed. What percentage of students scored lower than you?

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3.

What is indicated if an observation from a normal distribution has a z-score of -2.5?

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4.

Which names can be given to a distribution with zero EXCESS kurtosis?

There are two correct answers.
5.

What type of distribution would you display in a tabular format?

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6.

What value is given for the EXCESS kurtosis of any univariate normal distribution?

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7.

When does a type II error occur?

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8.

68% of the weights of bags of gravel are between 1.2 Kg and 1.6 Kg. What is the standard deviation if you assume that the data is normally distributed?

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9.

What is the P(x > 20) if X is a normally distributed variable with mean μ = 40 and standard deviation σ = 4?

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10.

What common characteristics does a leptokurtic distribution have?

There are two correct answers.

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