Statistics

posted by .

A recent survey found that 70% of all adults over 50 wear glasses for driving. You randomly select 30 adults over 50, and ask if he or she wears glasses. Decide whether you can use the normal distribution to approximate the binomial distribution. If so, find the mean and standard deviation. If not, explain why.

• Statistics -

Mean = np = 30 * .7 = ?

Standard deviation = √npq = √(30 * .7 * .3) = ?

Note: q = 1 - p

I'll let you finish the calculations.

Similar Questions

1. Statistics

Looking for someone to verify my homework answers on identifying the sample and population...... 1) A group of 50,000 randomly selected adults were survey about whether they drink at least 6 - 8 oz glasses of water each day. Only 35% …
2. statistics

A survey found 70% of adults over 50 wear glasses. In a random sample of 10 adults over 50, what is the probability that exactly six wear glasses and at least six wear glasses
3. Elementary Stats

A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that exactly eight wear glasses?
4. Math

A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that exactly eight wear glasses?
5. Statistics

A recent survey found that 63% of all adults over 50 wear glasses for driving. In a random sample of 80 adults over 50, what is the mean and standard deviation of those that wear glasses?
6. math

A group of 50,000 randomly selected adults were survey about whether they drink at least 6 8-oz glasses of water each day. Only 35% said yes to the question.
7. math

Suppose that the population of a certain townis made up of 45% of men and 55% of women. Of the men, 40% wear glasses, abd of the women, 20% wear glasses. Given that a person chosen at random from the town wears glasses, what is the …
8. Statistics

A recent survey found that 72% of all adults over 50 wear glasses for driving. In a random sample of 100 adults over 50, what is the mean and standard deviation of the numbe who wear glasses?
9. Statistics

A recent survey found that 70% of all adults over 50 wear glasses for driving. You randomly select 30 adults over 50, and ask if he or she wears glasses. Decide whether you can use the normal distribution to approximate the binomial …
10. maths

in a class there are 50 students,15 girls wear glasses 8 do not wear glasses.20 boys don't wear glasses.how many students wore glasses

More Similar Questions