MATH 3339 CERTIFICATION PAPER 2026
FULL SOLUTION GRADED A+
● find z score. Answer: qnorm(1-sig/2)
● The best point estimate for the population mean. Answer: is the
sample mean
● The margin of
error. Answer: can be computed from ±z* ⋅ σ/sqrt(n)
● A statement contradicting the claim in the null hypothesis is classified
as the power.. Answer: false
● If we want to claim that a population parameter is different from a
specified value, this situation can be considered as a one-tailed test..
Answer: false
● A 90% confidence interval for a population parameter means that if a
large number of confidence intervals were constructed from repeated
samples, then on average, 90% of these intervals would contain the true
parameter.. Answer: true
FULL SOLUTION GRADED A+
● find z score. Answer: qnorm(1-sig/2)
● The best point estimate for the population mean. Answer: is the
sample mean
● The margin of
error. Answer: can be computed from ±z* ⋅ σ/sqrt(n)
● A statement contradicting the claim in the null hypothesis is classified
as the power.. Answer: false
● If we want to claim that a population parameter is different from a
specified value, this situation can be considered as a one-tailed test..
Answer: false
● A 90% confidence interval for a population parameter means that if a
large number of confidence intervals were constructed from repeated
samples, then on average, 90% of these intervals would contain the true
parameter.. Answer: true
