Ask Experts Questions for FREE Help !
Ask
    erinpape's Avatar
    erinpape Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 8, 2008, 11:17 AM
    Statistics and probability
    Assume we want to estimate the mean IQ for the population of statistics professors. How many must be randomly chosen for IQ tests if we want 95% confidence that the sample mean is within 2 IQ points of the population mean?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
    		  
    #2

    Aug 8, 2008, 02:49 PM
    Were you given a standard deviation?
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Probability in statistics [ 3 Answers ]

One medical textbook states that only 6% of th human population has blood type O-Negative. Assume that a simple random sample of 45 people are selected. A. Find the probability that 5 of the selected people have blood type O-Negative. Would this be considered unusual. Why or why not? B. Find...

Statistics probability [ 1 Answers ]

Forget I thought this was a help site-

Statistics and Probability [ 1 Answers ]

I should have paid more attention in Statistics and Probability in college … but then again, I’m so old … I’d have forgotten by now anyway. :eek: So here are my problems. Event A = 8% chance of occurring. Event B = 67% chance of occurring. 1) What is the probability that at least one...

Statistics probability [ 1 Answers ]

I'm new to statistics and have a simple probability problem: The probabilities associated with the expected principal source of payment for hospital discharges in the United States in the year 1990 are listed below: Principal Source of Payment Probability Private Insurance 0.387...

View more questions Search