The z-value that corresponds to a two-tailed 95% confidence interval is z = +/- 1.96. Then the bounds of the confidence interval can be determined as:
Lower bound = mean - z*SD/sqrt(n) = 20 - 1.96*2/sqrt(100) = 20 - 0.12 = 19.88 hours
Upper bound = mean + z*SD/sqrt(n) = 20 + 1.96*2/sqrt(100) = 20 + 0.12 = 20.12 hours
So the first choice is the correct answer: 19.88-20.12 hours
Answer:
The equation is already in simplest form.
Step-by-step explanation:
you cannot combine any of the numbers because they are not like terms, so it cannot be simplified further.
acknolegde requirements:
straight line.(horizontol or vertical? i dunno)
passes through 3,3
perpindicular to y=-x-4
perpidicular lines have negative recipricals
-1 ---- 1
y-3= 1(x-3)
y-3=x-3
cancel out
y=x
The answer is 2 well that’s what I got