Question

In a study of birth order and intelligence, IQ tests were given to 18 and 19 year old men to estimate the similarity, if any, between mean IQ’s of firstborn sons and second born sons.

          Firstborn: n = 25, mean = 101.5, standard deviation = 13.6

          Secondborn: n=25, mean = 102.4, standard deviation = 9.14

         

Using a 0.10 significance level, test the claim that the average IQ for a FIRSTBORN son is the same as the average IQ for the SECONDBORN son.

• Write each statement.

• H_o(null hypothesis):
• H₁(alternative hypothesis):

• Write the Critical Value here:

• Write the “test statistic” here:

• Write the P-value here:

• REJECT H_o:   YES or NO

What is your conclusion?

Answer 1