Sunday

April 20, 2014

April 20, 2014

Posted by **Morgan** on Saturday, March 29, 2008 at 8:00pm.

A sample of adults in an area was taken.

657 of 750 drink milk.

Do these responses provide strong evidence that the 90% figure is not accurate for this region?

I figured it out and got the P-value to be .028

How do I explain this?

- statistics -
**drwls**, Saturday, March 29, 2008 at 11:21pmWith 750 persons and a 90% probability, the most probable result would be 0.9*750 = 675 and the standard deviation would be sqrt[0.9*0.1*750] = 8.2.

657 is 2.2 sigma less than the mean. That may be consistent with your P-value of 0.028, but I'm not certain what that means.

I do not consider that to be strong evidence that the 90% figure is not correct.

- statistics (reconsidered) -
**drwls**, Saturday, March 29, 2008 at 11:51pmI checked a normal distribution table and found a probability of only 1.4% that the number of milk drinkers would be 657 or less. That does strongly suggest the fraction may be less than 90% for that region.

**Related Questions**

Math 9 - My family went to starbucks. We ordered 3 drinks. My daughter's drink ...

Statistics - In a poll of 1,004 adults, 93% indicated that restaurants and bars ...

Math 9 - My family went to starbucks. We ordered 3 drinks. My daughter's drink ...

Math 9 - My family went to starbucks. We ordered 3 drinks. My daughter's drink ...

Statistics - Looking for someone to verify my homework answers on identifying ...

English - 1. Baby blue whales drink 200 liters of their mother's milk. 2. Baby ...

Biology - What in milk, (Calcium, fat, ...) causes it to be an antidiuretic? In ...

Probability and Statistics - The school superintendent would like to estimate ...

Math - Find how many quarts of 4% butterfat milk and 1% butterfat milk should be...

Health - Based upon the government’s research, they recommend that we do what ...