#7 Age in Years 0 1 2 Safety Seat 1143 1328 1086 3557 Seat Belt41 93 172 306 No
ID: 3321953 • Letter: #
Question
#7 Age in Years 0 1 2 Safety Seat 1143 1328 1086 3557 Seat Belt41 93 172 306 No Restraint 270 249 368 887 1454 1670 1626 4750 The table gives the number of infants involved in automobile accidents over a 5 year period categorized by age and the type of restraint used. A Chi-square test was run and the value of the appropriate test statistic was 6.4808 (a) What is the appropriate reference distribution? (b) What exactly were the null and alternative hypotheses being tested? (o) Under the null hypothesis, How many one year olds would be expected among the infants inv auto accidents who used no restraints?Explanation / Answer
a) Chisquare distribution
b)
H0: There is no assocation between age and type of restraint used
H1: There is assocation between age and type of restraint used
Let the los be alpha = 5%
c)
The expected among the infants involved in auto acidents who used no restraints is (887*1670) / 4750 = 311.8505
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.