USE THIS INFORMATION BELOW FOR THE NEXT 3 QUESTIONS (1-3)
In enjoin to prize the mediocre spell late on the computer terminals per student at a topical university, basis were calm from a scantling of 144 transaction students balance a one-week date. Assume the population rule intermission is 1.2 hours.
1. The rule declineacy of the mediocre is approximately
2. With a 0.95 chance, the brink of declineacy is approximately
3. If the scantling mediocre is 9 hours, then the 95% dependence period is approx.
a. 7.04 to 110.96 hours
b. 8.80 to 9.20 hours
c. 7.80 to 10.20 hours
d. 8.74 to 9.26 hours
11. It is desired to prize the mediocre entirety restoration of CEOs in the Service toil. Basis were haphazardly calm from 18 CEOs and the 97% dependence period was congenial to be ($2,181,260, $5,836,180). Which of the subjoined interpretations is redress?
a) 97% of the scantlingd entirety restoration rates prostrate among $2,181,260 and $5,836,180.
b) We are 97% strong that the mediocre of the scantlingd CEOs declines in the period $2,181,260 to $5,836,180.
c) In the population of Service toil CEOs, 97% of them earn possess entirety restorations that decline in the period $2,181,260 to $5,836,180.
d) We are 97% strong that the mediocre entirety restoration of all CEOs in the Service toil declines in the period $2,181,260 to $5,836,180.
Use the advice in the consideration underneath for questions 12 - 16
The subjoined are the durations in minutes of a scantling of long-distance phone calls made amid the continental United States reputed by one long-distance discharger.
Spell (in Minutes) Frequency
0 but hither than 5 0.37
5 but hither than 10 0.22
10 but hither than 15 0.15
15 but hither than 20 0.10
20 but hither than 25 0.07
25 but hither than 30 0.07
30 or past 0.02
12. If 1,000 calls were haphazardly scantlingd, how multifarious calls lasted 10 minutes or past?
13. If 100 calls were haphazardly scantlingd, how multifarious calls lasted hither than 15 minutes?
14. If 10 calls lasted 30 minutes or past, how multifarious entirety calls were in the scantling?
15. What is the cumulative not-absolute number for the % of calls that lasted < 10 minutes?
16. If 100 calls were scantlingd, _______ of them would possess lasted 15 or past minutes.
d) None of the overhead.
17. Since the population bigness is frequently larger than the scantling bigness, then the scantling statistic
a. can never be larger than the population parameter
b. can never be similar to the population parameter
c. can never be zero
d. can never be smaller than the population parameter
e. None of the overhead answers is redress.
18. The gauge of residuum that is the most likely to be influenced by extravagant rates in the basis set is the
e. None of the overhead answers is redress.
19. For a typical disposal, a indirect rate of z indicates
a. a strike has been made in computations, owing z is frequently positive
b. the area identical to the z is indirect
c. the z is to the left of the mediocre
d. the z is to the lawful of the mediocre
e None of the overhead answers is redress.
20. A dependence period was used to prize the correlation of statistics students that are females. A haphazard scantling of 72 statistics students generated the subjoined 90% dependence period: (0.438, 0.642). Based on the period overhead, is the population correlation of females similar to 0.60?
a) No, and we are 90% strong of it.
b) No. The correlation is 54.17%.
c) Maybe. 0.60 is a believable rate of the population correlation based on the advice overhead.
d) Yes, and we are 90% strong of it.
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