Towards statistical inference

Question 1

statistical inference

Answer 1

decision making about a population based in measurements of a random sample from that population

• basis of confidence intervals
• basis of hypothesis testing techniques

Question 2

null hypothesis

Answer 2

mean lifetime of new bulbs is the same as old

Question 3

p value

Answer 3

if it is really low the chance of the sample value if the all hypothesis is correct is also low and therefore reject null