Question

1) Which of the following is true of normal distributions? A) The median and mode are...

1) Which of the following is true of normal distributions?

A) The median and mode are equal.

B) Its measure of skewness is always greater than 1.

C) The range of the random variable X is bounded.

D) Mathematical formulas make it easier to compute normal distributions.

2) Sampling errors occur because the means cannot be accurately estimated using samples. True or False?

Math   Statistics-And-Probability   
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Answer #1

Ans 1)

Option (A) is correct mean =median =mode in case of normal distribution. Hence median is equal to mode.

Option B is incorrect because normal distribution is symmetric so skewness is zero.

Option C is incorrect because x is nit bounded x is all valye in population.

Option d normal distribution is not easier to compute.

Hence option A is correct

Ans 2

Is true.

Sampling error is incurred when statistical characteristics of population are calculated from a subset or sample of that population. Since sample is not containing all parameters of population. Such as mean and quantiles, generally differ from population characteristics.

Every researcher take sample as per convenient. Hence sampling error is occurring means nit estimated accurately using samples.

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