It's proposed that the average life expectancy these days is 71.6, but recent data suggests it might be different from t

[answerhappygod]

It's proposed that the average life expectancy these days is
71.6, but recent data suggests it might be different from that. A
sample size of 86 countries found a sample mean life expectancy of
74 years with a standard deviation of 8.8 years. You want to
formulate and test a hypothesis that can be used to challenge the
validity of the claim at a significance level of 0.10. With
hypotheses H 0 : μ = 71.6 vs H 1 : μ ≠ 71.6 , what is/are the
critical value(s)? (Report answer accurate to 2 decimal places.)
________
What is the test statistic for this sample? (Report answer
accurate to 3 decimal places.) _______
What is the p-value for this sample? (Report answer accurate to
4 decimal places.) _______
Our decision is to
A. reject the null
B. accept the null
C. fail to reject the null
As such, the final conclusion is
A. that there is sufficient evidence to conclude that the
population mean life expectancy is equal to 71.6.
B. there is not sufficient evidence to conclude that the
population mean life expectancy is equal to 71.6.
C. there is sufficient evidence to conclude that the population
mean life expectancy is not equal to 71.6.
D. there is not sufficient evidence to conclude that the
population mean life expectancy is not equal to 71.6.