# statistics

posted by .

Assume that we collect a large (n>30) simple random sample of annual incomes of adults in the United States. Because the sample is large, can we approximate the distribution of those incomes with a normal distribution ? Why or why not?

• statistics -

Yes, whenever you have a large sample you can approximate it by using the normal distribution.

## Similar Questions

1. ### math

I was given a table that showed a simple random sample of adults' age and annual income living in suburb of a large city. a) What is the probability that a person chosen at random from those in this sample will be the 31-45 age category?
2. ### statistics

Annual household incomes in a certain region have a distribution that is skewed right, with mean 30.25 thousand dollars and a standard deviation of 4.50 thousand dollars. If a random sample of 100 households is taken, then the probability …
3. ### Statistics and Probability

A computer supply house receives a large shipment of blank CDs each week. Past experience has shown that the number of flaws per CD can be described by the following probability distribution, where the random variable X represents …
4. ### Math--Statistics

I have a couple of questions that need review--I've answered them, but I'm not sure if I'm correct. 1.)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll compute the sample mean commute …
5. ### Math

1.)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll compute the sample mean commute distance. Now imagine repeating the survey many, many times, each time recording a different …
6. ### Statistics

Assume that the sample is taken from a large population and the correction factor can be ignored. The average teacher's salary is \$43152. Suppose that the distribution is normal with standard deviation equal to \$7000. If we sample …
7. ### statistics

the mean annual income for adult women in one city is and the standard deviation of the incomes is The distribution of incomes is skewed to the right. For samples of size 30, which of the following statements best describes the sampling …
8. ### Statistics

A random sample of customer incomes yields a mean income of \$35000 with a standard deviation of \$4500. Assume that the distribution of the incomes in normal. What income range would include 90% of the most popular incomes?
9. ### stats

(a) The test had six multiple-choice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed?
10. ### stats

(a) The test had six multiple-choice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed?

More Similar Questions