SOLUTION: The population standard deviation is unknown. Data from a recent study suggests that 61% of the population that buys a certain product is female. In a sample of n = 200 people tha

Question 1080707: The population standard deviation is unknown.
Data from a recent study suggests that 61% of the population that buys a certain product is female. In a sample of n = 200 people that purchased this product, 136 were female. What is the expected frequency of male purchasers in this sample?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The population standard deviation is unknown.
Data from a recent study suggests that 61% of the population that buys a certain product is female. In a sample of n = 200 people that purchased this product, 136 were female. What is the expected frequency of male purchasers in this sample?
-----
E = n*p = 200*0.39 = 78
--------------
Cheers,
Stan H.
-------------------
RELATED QUESTIONS
How do I determine the correct critical value (s) in each of the following situations... (answered by stanbon)

Hi, - Claim: the population mean is greater than 948. Sample data: n = 100, x-bar = (answered by stanbon)

A recent study of 25 Orlando, FL residents revealed that they had lived in their current... (answered by Boreal)

It is known that the weights of apples from a farm are normally distributed. In order to... (answered by Boreal)

It is known that the weights of apples from a farm are normally distributed. In order to... (answered by CPhill)

Chebychev's Rule states that at least 75.0% of the observations in any data set are... (answered by stanbon)

A recent study suggests that 70% of all elegible voters will vote in the next... (answered by jjthomson83)

To conduct a hypothesis test of the claim that the population mean satisfaction rating of (answered by Theo)

n a random sample of 9 cell phones, the mean full retail price was $505.20 and the... (answered by Boreal)