Question

1. In a standard normal distribution, the

Group of answer choices

mean is 1 and the standard deviation is 0.

mean and the standard deviation can have any value.

mean is 0 and the standard deviation is 1.

mean and the standard deviation are both 1.

2.

For the density curve below, which of the following is true?

Group of answer choices

It is skewed left.

The mean is about 0.7.

The total area under the curve is 1.

It is symmetric.

3. Suppose that a survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales tax.Suppose that 40% of all adults in Ohio support the increase. We independently select 7 adults at random and record their status in supporting the increase. What type of distribution does the above scenario satisfy?

Group of answer choices

Binomial distribution

Uniform distribution

Continuous distribution

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Answer 1

1. In a standard normal distribution, the

mean is 0 and the standard deviation is 1.

2. For the density curve below, which of the following is true?

The total area under the curve is 1.

3. Suppose that a survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales tax.Suppose that 40% of all adults in Ohio support the increase. We independently select 7 adults at random and record their status in supporting the increase. What type of distribution does the above scenario satisfy?

Binomial distribution