Statistics – NBC Institute

QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

Question

Two events are said to be mutually exclusive if
A. The occurrence (or non-occurrence) of one event does not affect the occurrence (or non-occurrence) of the other event
B. Both events can occur simultaneously
C. The occurrence of one event precludes the occurrence of the other event
D. Both are impossible events

Answer

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Tags: Mutually Exclusive Events, Probability, Statistics
Level: Level 1

Topic: Probability
Series: NOV 2014

QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

Question

The following data gives the distribution by age of licensed automobile drivers in a city in the year 2011:

Age Group	Number of Drivers (in thousands)
14 – 19	5
20 – 25	48
26 – 31	124
32 – 37	205
38 – 43	86
44 – 49	72
50 – 55	53
56 – 61	13

You are required to calculate the lower quartile (Q1) and upper quartile (Q3) of the age of the drivers.

Answer

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Tags: Drivers' Age, Frequency Distribution, Quartiles, Statistics
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2015

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

Question

The algebraic sum of the deviations of a set of numbers from their mean is:

A. The mean of the numbers
B. The modal number
C. The median of the numbers
D. Zero
E. One

Answer

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Tags: Deviations, Mean, Statistics
Level: Level 1

Topic: Statistics
Series: MAY 2015

QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

Question

In a study commissioned by Ofo Stores, the researcher examined the spending habits of the residents of Kojokrom. He found the spending habits to be normally distributed with a mean of GH¢700 and a standard deviation of GH¢70.

Required:
i) Determine the probability that a resident selected at random spends:

Less than GH¢620 (3 marks)
More than GH¢1,000 (3 marks)
Between GH¢800 and GH¢900 (4 marks)

ii) Calculate the amount:

Above which 80% of the residents will spend in a week (2 marks)
Below which 30% of the residents will spend in a week (2 marks)

Answer

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Tags: Continuous Variables, Normal distribution, Probability, Spending Habits, Statistics
Level: Level 1

Topic: Probability
Series: NOV 2018

QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

Question

Answer

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Tags: Mutually Exclusive Events, Probability, Statistics
Level: Level 1

Topic: Probability
Series: NOV 2014

QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

Question

The following data gives the distribution by age of licensed automobile drivers in a city in the year 2011:

Age Group	Number of Drivers (in thousands)
14 – 19	5
20 – 25	48
26 – 31	124
32 – 37	205
38 – 43	86
44 – 49	72
50 – 55	53
56 – 61	13

You are required to calculate the lower quartile (Q1) and upper quartile (Q3) of the age of the drivers.

Answer

Find Related Questions by Tags, levels, etc.

Tags: Drivers' Age, Frequency Distribution, Quartiles, Statistics
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2015

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

Question

The algebraic sum of the deviations of a set of numbers from their mean is:

A. The mean of the numbers
B. The modal number
C. The median of the numbers
D. Zero
E. One

Answer

Find Related Questions by Tags, levels, etc.

Tags: Deviations, Mean, Statistics
Level: Level 1

Topic: Statistics
Series: MAY 2015

QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

Question

Required:
i) Determine the probability that a resident selected at random spends:

Less than GH¢620 (3 marks)
More than GH¢1,000 (3 marks)
Between GH¢800 and GH¢900 (4 marks)

ii) Calculate the amount:

Above which 80% of the residents will spend in a week (2 marks)
Below which 30% of the residents will spend in a week (2 marks)

Answer

Find Related Questions by Tags, levels, etc.

Tags: Continuous Variables, Normal distribution, Probability, Spending Habits, Statistics
Level: Level 1

Topic: Probability
Series: NOV 2018

Question Tag: Statistics

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QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

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QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

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QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

You're reporting an error for "QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis"

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

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QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

You're reporting an error for "QT – Nov 2018 – L1 – Q5b – Probability"

QTB – Nov 2014 – L1 – SA – Q1 – Probability

Determines the correct definition of mutually exclusive events.

You're reporting an error for "QTB – Nov 2014 – L1 – SA – Q1 – Probability"

QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis

This question requires calculating the lower and upper quartiles for the age distribution of licensed automobile drivers using cumulative frequency.

You're reporting an error for "QTB – May 2015 – L1 – SB – Q5b – Data Collection Analysis"

QTB – May 2015 – L1 – SA – Q16 – Statistics

Identifying the algebraic sum of deviations from the mean in a dataset.

You're reporting an error for "QTB – May 2015 – L1 – SA – Q16 – Statistics"

QT – Nov 2018 – L1 – Q5b – Probability

Solve normal distribution problems related to spending habits of residents in Kojokrom.

You're reporting an error for "QT – Nov 2018 – L1 – Q5b – Probability"

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