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QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

Question

A ten-year record of cocoa production in a certain farm is tabulated as follows:

Year	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012
Production (tonnes)	42	52	41	48	64	67	77	66	73	89

Based on a 4-year moving total, the centered moving average for the year 2007 is:
A. 79.5
B. 69.5
C. 59.5
D. 49.5
E. 39.5

Answer

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Tags: Business Statistics, Moving Average, Time series
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

Question

If $r$ is the correlation coefficient calculated for a bivariate data, then which one of the following is correct?

A. $1$
B.
C.
D.
E.

Answer

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Tags: Bivariate Data, Business Statistics, Correlation
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

Question

Which of the following is NOT TRUE about Normal Distribution?
A. Normal distribution is a frequency distribution.
B. Both tails of the distribution approach but never meet the horizontal axis.
C. It is a probability distribution of a continuous variable that fits many naturally occurring distributions.
D. The exact shape of the normal curve depends on the mean of the distribution.
E. The area under the normal curve represents the probability and totals 1 or 100%.

Answer

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Tags: Business Statistics, Normal distribution, Probability
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

Question

The variance of is 4, and the mean is 5. Find the standard deviation.

A. 2
B. 3
C. 2
D. 3
E. 16

Answer

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Tags: Business Statistics, Dispersion, Mean, Standard Deviation, Variance
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

Question

If the monthly salary of the staff of ABC Plc. is distributed as follows:

Monthly salary (N’000)	Number of staff
6 and under 12	2
12 and under 18	13
18 and under 24	16
24 and under 30	10
30 and under 36	2
36 and under 42	1
Total	44

Then, the median salary is:
A. N20,256
B. N20,265
C. N20,526
D. N20,625
E. N20,652

Answer

Find Related Questions by Tags, levels, etc.

Tags: Business Statistics, Frequency Distribution, Median, Salary Distribution
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

Question

A ten-year record of cocoa production in a certain farm is tabulated as follows:

Year	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012
Production (tonnes)	42	52	41	48	64	67	77	66	73	89

Based on a 4-year moving total, the centered moving average for the year 2007 is:
A. 79.5
B. 69.5
C. 59.5
D. 49.5
E. 39.5

Answer

Find Related Questions by Tags, levels, etc.

Tags: Business Statistics, Moving Average, Time series
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

Question

If $r$ is the correlation coefficient calculated for a bivariate data, then which one of the following is correct?

A. $1$
B.
C.
D.
E.

Answer

Find Related Questions by Tags, levels, etc.

Tags: Bivariate Data, Business Statistics, Correlation
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

Question

Answer

Find Related Questions by Tags, levels, etc.

Tags: Business Statistics, Normal distribution, Probability
Level: Level 1

Topic: Statistics
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

Question

The variance of is 4, and the mean is 5. Find the standard deviation.

A. 2
B. 3
C. 2
D. 3
E. 16

Answer

Find Related Questions by Tags, levels, etc.

Tags: Business Statistics, Dispersion, Mean, Standard Deviation, Variance
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2017

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

Question

If the monthly salary of the staff of ABC Plc. is distributed as follows:

Monthly salary (N’000)	Number of staff
6 and under 12	2
12 and under 18	13
18 and under 24	16
24 and under 30	10
30 and under 36	2
36 and under 42	1
Total	44

Then, the median salary is:
A. N20,256
B. N20,265
C. N20,526
D. N20,625
E. N20,652

Answer

Find Related Questions by Tags, levels, etc.

Tags: Business Statistics, Frequency Distribution, Median, Salary Distribution
Level: Level 1

Topic: Data Collection Analysis
Series: MAY 2017

Question Tag: Business Statistics

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QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

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QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q18 – Statistics"

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

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QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

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QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis"

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis"

QTB – May 2017 – L1 – SA – Q18 – Statistics

This question calculates the centered moving average for a specific year in a time series of cocoa production.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q18 – Statistics"

QTB – May 2017 – L1 – SA – Q17 – Statistics

This question checks the range of values for the correlation coefficient r.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q17 – Statistics"

QTB – May 2017 – L1 – SA – Q16 – Statistics

This question asks to identify a false statement about normal distribution.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q16 – Statistics"

QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis

This question involves finding the standard deviation given the variance and mean.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q10 – Data Collection Analysis"

QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis

This question calculates the median salary from a salary distribution.

You're reporting an error for "QTB – May 2017 – L1 – SA – Q8 – Data Collection and Analysis"

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