Question

1. A recent industry report indicated that 60% of drivers involved in a residential accident will be in at least one other traffic accident in the last 3 years. An advisory group decided to investigate this claim, believing it was too large. A sample of 400 traffic accidents this year showed 200 persons were also involved in another accident with in the last 3 years. Use the 0.10 significance level.
   1. Why can we use z as the test statistic?
   2. State the null and alternate hypothesis
   3. Show the decision rule graphically.
   4. Compute the value of z and state your decision regarding the null hypothesis.
   5. Determine and interpret the p value
2. A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information. At the 0.10 significance level, is there a relationship between job pressure and age

Degrees of Job Pressure

age low medium high

less than 25 67 61 60

25 up to 40 43 40 46

40 up to 60 63 52 62

60 up to older 32 22 27

Answer 1