Zim Statistics

Zim Statistics

12th Grade

•

95 Qs

quiz-placeholder

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Zim Statistics

Zim Statistics

Assessment

Quiz

•

Mathematics

•

12th Grade

•

Practice Problem

•

Hard

Created by

Ephraim Mudefi

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95 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

State the difference between a population and a sample.

A population includes all members of a group, while a sample includes only a subset of the group.

A sample includes all members of a group, while a population includes only a subset of the group.

A population is always smaller than a sample.

A sample is always larger than a population.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the importance of randomness in sampling.

Randomness ensures that the sample is biased.

Randomness ensures that the sample represents the population accurately.

Randomness ensures that the sample is larger than the population.

Randomness ensures that the sample is smaller than the population.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the mass of each of the remaining 4 mangoes if the mean mass of 8 mangoes is 120 grams and the masses of four mangoes are 107, 112, 126, and 130 grams.

115 grams

120 grams

110 grams

125 grams

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

State the modal mass of the 8 mangoes.

107 grams

112 grams

126 grams

130 grams

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

State the median mass of the 8 mangoes.

118 grams

120 grams

115 grams

126 grams

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Construct the probability distribution table for the random variable X, which takes values -4, d, and 4 with probabilities 1/4, m, and 1/4 respectively.

X = {-4, d, 4}, P(X) = {1/4, m, 1/4}

X = {-4, d, 4}, P(X) = {1/3, m, 1/3}

X = {-4, d, 4}, P(X) = {1/2, m, 1/2}

X = {-4, d, 4}, P(X) = {1/5, m, 1/5}

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the value of m if the probabilities of the random variable X are 1/4, m, and 1/4.

1/2

1/4

1/3

1/5

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