Question
A group of social scientists wanted to determine if police officers have a higher IQ than the general public. To test this theory, they took
A group of social scientists wanted to determine if police officers have a higher IQ than the general public. To test this theory, they took a sample of 140 police officers and administered an IQ test. The mean score for officers was 112 with a standard deviation of 10. A second sample of 150 citizens from the general population yielded a average IQ score of 105 with a standard deviation of 15. Utilize the t-statistic to test the following hypotheses:
Ha: Police Officers are significantly more intelligent than the general public
Ho: Police officers are not significantly more intelligent than the general public
What is the calculated value of t for this problem?
A. 1.49
B. 2.22
C. 4.68
D. 7.00
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