Testname: MAT2058 Week 4 Practice Quiz
Answer Key
1. A; The (total) width of the confidence interval is 0.52 - 0.432 = 0.088; E = half this width, =
0.044.
2. D; First need to solve for p-hat = 69/130
In the test statistic formula can you identify what each variable stands for:
zan-Pi'sortPu-pn
what does
Fm and P stand for?
H, Im Allan. Welcome to Smarthinking
ley again Allan.
FM 2 sample proport
MAT2058 Week 3 Practice Quiz
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and
standard deviation 1.
1)
Shaded area is 0.4013.
1)
_
A)
-0.57
B)
-0.25
C)
0.
MAT2058 Week 4 Practice Quiz
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers
the question.
Express the confidence interval using the indicated format. Please s
Example Using the Continuity Correction
See p. 348 #6.94: 30% of students entering a certain university drop out during or at the end of their
first year. What is the probability that more than 600 of
724
Appendix A
Tables
NEGATIVE 2 Scores
z 0
Table A-2 Standard Normal (2) Distribution: Cumulative Area from the LEFI'
z .02 .03 .04 .05 .03 .07 .03 .09
3.50 and .0001 0196
lower I
3.4 .0003 .0003