Question

In: Statistics and Probability

1. The sampling distribution of the sample mean is approximately normal for all sample sizes. a....

1. The sampling distribution of the sample mean is approximately normal for all sample sizes.

a. true

b. false

2. If all possible samples of the same size have the same chance of being selected, these samples are said to be random samples.

a. true

b. false

3. The population of sample means of every possible sample size (n) is known as the ______ distribution of the mean.

4. A sample size of 49 drawn from a population with a mean of 36 and a standard deviation of 15 for the size of an English class. What is the probability the class will have 33 or less?

a. .5808

b. .1608

c. .0808

d. .4192

Expert Solution

Solution :

1)

False

2)

True

3)

Sampling

4)

= / n = 15 / 49

P( 33) = P(( - ) / (33 - 36) / 15 / 49 )

= P(z -1.4)

= 0.0808

orchestra answered 2 years ago

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