# Question: the mean suicide rate for 183 countries in 2000 was...

###### Question details

The mean suicide rate for 183 countries in 2000 was 10.84 with a standard deviation of 8.54

the rate in same countries in 2016 was 9.27 with stand dev of 6.00

state the null hypothesis for this decline in suicide mortality. choose an alpha level (.05) and corresponding z value to establish a critical region.

calculate the the observed z value

should we accept the null or alternative hypothesis. what's your conclusion.

Please show all work.