11. A study was conducted to determine if there was a difference in the driving
ID: 3066012 • Letter: 1
Question
11. A study was conducted to determine if there was a difference in the driving ability of students from West University and East University by sending a survey to a sample of 100 students at both universities. Of the 100 sampled from West University, 15 reported they were involved in a car accident within the past year. Of the 100 randomly sampled students from East University, 12 students reported they were involved in a car accident within the past year. What is the estimate of the difference, d, between the two sample proportions, P, and p2, of students at East University and West University, respectively, who were involved in a car accident within the last year?
Explanation / Answer
Solution:-
11) The estimate of the difference, d betweeen the two sample proportions is 0.03.
x1 = 15
n1 = 100
p1 = 15/100
p1 = 0.15
x2 = 12
n2 = 100
p2 = 12/100
p2 = 0.12
d = p1 - p2
d = 0.15 - 0.12
d = 0.03
8) A)
State the hypotheses. The first step is to state the null hypothesis and an alternative hypothesis.
H0: Year in school and opinion regarding the tuition increase are independent.
Ha: Year in school and opinion regarding the tuition increase are dependent.
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