Question

the claim is that the proportion of accidental deaths of the elderly attributable to residential falls is more 0.10 and the sample statistic include n= 800 deaths of the elderly with 15% of them attributable to residentail falls. find the value of the test statistic

Answer 1

p = 0.10

n = 800

= 0.15

x = n*

= 120

Since x > 5 and n-x > 5, sampling distribution of can be approximated by normal distribution with

mean, = p = 0.1

Std. Deviation, =

= 0.011

Test Statistic, z = (-p)/

= (0.15-0.1)/0.011

= 4.5455

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