# Total Quality Management Questions and Answers – Statistics for TQMR – 3

This set of Total Quality Management Question Paper focuses on “Statistics for TQMR – 3”.

1. The collection of all the results of an operation can be called as __________ in statistics.
a) Population
b) Sample
c) Sampling
d) Random

Explanation: The collection of all the results of an operation can be called as ‘population’ in statistics. ‘Population’ is also known as ‘Universe’ in statistics. The inclusion of all observations in a data set can be referred to as ‘population’.

2. The subset of a population is known as ________
a) Population
b) Sample
c) Sampling
d) Random variable

Explanation: The subset of a population is known as ‘sample’ data. For example, people living in a state can be referred to as a ‘population’, but the number of English speaking people from that population can be referred to as a ‘sample’.

3. The process of sample selection in statistics is known as _______
a) Mean
b) Median
c) Sampling
d) Random variable

Explanation: The process of sample selection in statistics is known as ‘sampling’. The sample selection should be judicious and must reflect and resemble the entire population.

4. Sampling can be used when it is impossible to measure the entire population.
a) True
b) False

Explanation: Sampling can be used when it is impossible to measure the entire population. It can be also be used when measuring the whole population is expensive.

5. The Gaussian curve is also known as ______
a) Poisson curve
b) Weibull curve
c) Normal curve
d) Exponential curve

Explanation: The Gaussian curve is also known as the normal curve. It is symmetrical and has a bell-shaped distribution. The mean, mode, and median have the same value.
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6. If the standard deviation is zero, what comment can we make on the type of normal curve formed?
a) Data spread around the mean value is more
b) Data spread around the mean value is less
c) Data spread around the mean value is more in the negative x-axis only
d) No curve is formed

Explanation: If the standard deviation is zero, there is no curve formed. All the values are identical to the mean value. The ‘Normal curve’ is also known as the ‘Gaussian curve’.

7. There are two normal curves with the same mean value. The standard deviation of curve 1 is more than curve 2, what can we comment on the two normal curves?
a) Curve 1 is flatter than Curve 2
b) Curve 1 is peaked than Curve 2
c) Curve 1 is similar to Curve 2
d) Curve 1 and Curve 2 cannot be compared

Explanation: There are two normal curves with the same mean value. Curve 1 is flatter than Curve 2. The data is more spread out in Curve 1. Curve 2 data spread is narrower compared to Curve 1.

8. ‘Parameter’ is a true population estimated by a ‘statistic’ and is often unknown.
a) True
b) False

Explanation: ‘Parameter’ is a true population estimated by a ‘statistic’ and is often unknown. ‘Parameter’ is difficult and expensive to be measured directly.

9. Numerical data measured directly from a sample is known as _______
a) Sampling
b) Statistic
c) Population
d) Parameter

Explanation: Numerical data measured directly from a sample is known as ‘statistic’. It can be utilized in making inferences about a population. ’Parameter’ is estimated from a ‘statistic’.

10. Which of the following is not a type of sampling technique?
a) Stratified sampling
b) Cluster sampling
c) Judgment sampling
d) Sample sampling

Explanation: Stratified sampling, cluster sampling, and judgment sampling are different sampling techniques. Simple random sampling and systematic sampling are the other types of sampling techniques.

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