1. (5) A communtyclege employs 85 full ime faculy members. To gan random sample

Question

1. (5) A communtyclege employs 85 full ime faculy members. To gan random sample that upcoming buildingproject, consist of 9 faculty members. He numbers the faculty from I to the college president wishes to obtain a simple random sample that will 85. the p fthe provided raer ls83294 74608 890440 82640 038438to determine random the numbers for the 9 faculty members who will be included in the sample.pre 08, 21 29, 40,43, 441%,47,83 Let 69 becase on t's are net th lou (5) The survey has bias, (a) Determine the type of bias. tb) Sugg 2. est a remedy. A pro- free trade advocate w imported goods, He conducts The interviewer asks the ants to estimate the percentage of people who favor decreasing tariffs on s a nationwide survey of 1200 randomly selected adults 18 years and older. (a) Which of these best describes the bias in the survey? Circle you respondents, "Do you favor supporting free trade with our friendly neighbors?" (A) Response bias (B) Nonresponse bias (C) Sampling bias (b) How can the bias be remedied? (A) The interviewer should survey people under 18 as well (B) The interviewer should survey people by phone and in person. (C) The interviewer should reword the question. 3. (10) Match each sampling method described below (A)Stratified (B) Systematic (C) Simple random sample (D) Cluster (a) To estimate the percentage of defects in a recent manufacturing batch, a quality-control manager at Intel selects every 8th chip that comes off the assembly line starting with the 3rd until she obtains a sample of 140 chips. Answer: )To determine customer opinion of its boarding policy, Southwest Airlines randomly select 60 fights during a certain week and surveys all passengers on the fights. Answer:

Explanation / Answer

#7.

a)

b)
53/2250 = 2.36% answered always

c)
Percentage = (366+524)/2250 = 39.56%

d)
Option B

#8.
a)
1 | 1 8
2 | 1 4 4
3 | 3 5 5 5 5 7
4 | 1 7 9
5 | 0

b)
Shape is bell curve i.e. normal distribution

c)
Mean = 33 (sum/15)
Median = 35 (8th position in sorted data is occupied by 35)
Mode = 35 (35 occurs 4 times)

Response Frequency Relative Frequency Never 366 366/2250 0.16 Rarely 524 524/2250 0.23 Sometimes 958 958/2250 0.43 Most of the time 349 349/2250 0.16 Always 53 53/2250 0.02 Total 2250

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