Posted by **monica** on Tuesday, November 9, 2010 at 4:19pm.

How do I do this? I am very lost.

If you live in California, the decision to buy earthquake insurance is an important one. A survey revealed that only 133 of 337 randomly selected residences in one California county were protected by earthquake insurance. Calculate the appropriate test statistic to test the hypotheses that at least 40% buy the insurance.

- Statistics -
**MathGuru**, Tuesday, November 9, 2010 at 7:49pm
Null hypothesis:

Ho: p = or > .40 -->meaning: population proportion is equal to or greater than .40

Alternative hypothesis:

Ha: p < .40 -->meaning: population proportion is less than .40

Using a formula for a binomial proportion one-sample z-test with your data included, we have:

z = .39 - .40 -->test value (133/337 = .39) minus population value (.40)

divided by √[(.40)(.60)/337]

Note: .60 = 1 - .40

I'll let you finish the calculation.

Hint: Null will not be rejected. You can draw your conclusion from there.

- Statistics -
**Anonymous**, Saturday, November 20, 2010 at 5:42am
In a recent survey, 70% of the community favored building a haelth center in their neighborhood. If 14 citizens are chosen, find the probabilty that exactl 6 of them favore the building of the health center.

- Statistics -
**John**, Monday, April 9, 2012 at 10:47pm
On your TI-84 Calculator Press "2nd" "VARS" for the [Distr] menu. Scroll down to binompdf( and press enter

Then enter in this order

binompdf(14,0.70,6) = 0.023

## Answer This Question

## Related Questions

- Advice - If I want to live in the state of California in the future, there is ...
- statistics - According to the Current Population Survey of the Census Bureau, 67...
- statistics - According to the Current Population Survey of the Census Bureau, 67...
- Math Help ASAP - A movie complex has eight different movie theaters. The manager...
- statistics - Suppose x is a uniform random variable with c=10 and d=70. Find the...
- Statistics - An automatic machine in a manufacturing process is operating ...
- finite - the probability that a randomly selected 4 year old male feral cat will...
- Statistics - 1200 high school freshman were randomly selected for a national ...
- math - The results of a recent television survey of American TV households ...
- Statistics - Suppose that the birth weight of newborn babies in the U.S is ...

More Related Questions