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Quiz

STA 205 Quiz: ReviewEXAM1Exam


Department
Statistics
Course Code
STA 205
Professor
Brooke Buckley
Study Guide
Quiz

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=147747&uid=11461 1/7
Grade Book Detail
Damico , Emily
Exam 1 Review
Started: September 11, 2018, 10:13 pm
Last change: September 12, 2018, 1:17 am
Time spent: 185 minutes
Total time questions were on‑screen: 84 minutes.
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ThebatterylifefornewiPadsisnormallydistributedwithameanof591minutesandastandarddeviationof
30.6minutes.
a.Betweenwhattwovalueswouldweexpectthebatterylifeof68%ofnewiPadstofall?(4pts)
between and minutes
b.WhatistheprobabilitythebatterylifeforanewiPadisbetween531and618minutes?(6pts)
z1= 
z2= 
probability= 
c.IfaniPad’sbatterylifeisinthebottom4%,thebatteryisinspectedfordefects.Whatbatterylife
resultsinaninspection?(5pts)
z= 
batterylife= minutes
Answer:560.4
Answer:621.6
Answer:1.96or0.88
Answer:1.96or0.88
Answer:0.7856
Answer:1.75
Answer:537.45
Question 1: 15 (parts: 2, 2, 2, 2, 2, 2, 3) out of 15 (parts: 2, 2, 2, 2, 2, 2, 3)in 1 attempt(s)

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=147747&uid=11461 2/7
Doyouthinkthattextbookcostsarereasonable?
DoyouplantovisitCampusRecthismonth?
Didyouattendallyourclassesthefirstweek?
Threesamplesof100studentseachwereselectedfromalargeuniversity.Onesamplewasasked"doyou
thinkthattextbookcostsarereasonable?";onesamplewasasked"didyouattendallyourclassesthefirst
week?";andthelastsamplewasasked"doyouplantovisitCampusRecthismonth?".Theresponsesare
summarizedinthegraphsbelow:
a.Matchthebargraphsabovetothequestiontheymostlikelysummarized.(6pts)
b.Whichofthethreesampleshasthemostvariability?Thatis,whichsamplewouldyouhavethehardest
timepredictingaresponseformanyoneindividual?(2pts)
Sample3
Sample2
Sample1
Answer:Sample3Sample2Sample1
Answer:Sample2
Question 2: 8 (parts: 4, 4) out of 8 (parts: 4, 4)in 2 attempt(s)
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