Homework Answers
![PB to B = 11 / 2 = 0.1535 (P-fo) = 0.1325-0.1535 = Focolt] option B . Ho : PA-PB=0; HA: PA-PB + b = DATAB = 1181119 = 0.1451](http://img.homeworklib.com/questions/42b31c40-858c-11eb-9de3-17554dcb247a.png?x-oss-process=image/resize,w_560)
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(10 points) A recent study of two vendors of desktop personal computers reported that out of...
A recent study of two vendors of desktop personal computers reported that out of 879 units...
A recent study of two vendors of desktop personal computers reported that out of 879 units sold by Brand A, 116 required repair, while out of 749 units sold by Brand B, 127 required repair. Round all numeric answers to 4 decimal places. 1. Calculate the difference in the sample proportion for the two brands of computers, ?̂??????−?̂??????= 3. Calculate the pooled estimate of the sample proportion, ?̂= 4. Is the success-failure condition met for this scenario? A. Yes B....
A recent study of two vendors of desktop personal computers reported that out of 877 units...
A recent study of two vendors of desktop personal computers reported that out of 877 units sold by Brand A, 147 required repair, while out of 710 units sold by Brand B, 114 required repair. Round all numeric answers to 4 decimal places. 1. Calculate the difference in the sample proportion for the two brands of computers, p̂ BrandA−p̂ BrandB = 2. What are the correct hypotheses for conducting a hypothesis test to determine whether the proportion of computers needing...
A recent study of two vendors of desktop personal computers reported that out of 898 units sold b...
A recent study of two vendors of desktop personal computers reported that out of 898 units sold by Brand A, 102 required repair, while out of 793 units sold by Brand B, 129 required repair. Round all numeric answers to 4 decimal places. 1. Calculate the difference in the sample proportion for the two brands of computers, p̂ BrandA−p̂ BrandBp^BrandA−p^BrandB = ________ 2. What are the correct hypotheses for conducting a hypothesis test to determine whether the proportion of computers...
Twelve runners are asked to run a 10-kilometer race on each of two consecutive weeks. In one of the races, the runners wear one brand of shoe and in the other a different brand. The brand of shoe the...
Twelve runners are asked to run a 10-kilometer race on each of two consecutive weeks. In one of the races, the runners wear one brand of shoe and in the other a different brand. The brand of shoe they wear in which race is determined at random. All runners are timed and are asked to run their best in each race. The results (in minutes) are given below: Runner Brand 1 Brand 2 31.23 32.02 29.33 28.98 30.50 30.63 32.20...
9 points) A news article reports that "Americans have differing views on two potentially inconvenient and...
9 points) A news article reports that "Americans have differing views on two potentially inconvenient and invasive practices that airports could implement to uncover potential terrorist attacks." This news piece was based on a survey conducted among a random sample of 1163 adults nationwide, interviewed by telephone November 7-10, 2010, where one of the questions on the survey was "Some airports are now using 'full-body' digital x-ray machines to electronically screen passengers in airport security lines. Do you think these...
A package delivery service wants to compare the proportion of on-time deliveries for two of its...
A package delivery service wants to compare the proportion of on-time deliveries for two of its major service areas. In City A, 325 out of a random sample of 382 deliveries were on time. A random sample of 264 deliveries in City B showed that 209 were on time. Calculate the difference in the sample proportion for the delivery times in the two cities. Calculate the pooled estimate of the sample proportion. Is the success-failure condition met for this scenario?...
Recent incidents of food contamination have caused great concern among consumers. An article reported that 33...
Recent incidents of food contamination have caused great concern
among consumers. An article reported that 33 of 80 randomly
selected Brand A brand chickens tested positively for either
campylobacter or salmonella (or both), the leading bacterial causes
of food-borne disease, whereas 69 of 80 Brand B brand chickens
tested positive.
(a)
Does it appear that the true proportion of non-contaminated
Brand A chickens differs from that for Brand B? Carry out a test of
hypotheses using a significance level 0.01....
Help Save & Exit Check my A consumer advocate researches the length of life between two...
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
Twelve runners are asked to run a 10-kilometer race on each of two consecutive weeks. In...
Twelve runners are asked to run a 10-kilometer race on each of two consecutive weeks. In one of the races, the runners wear one brand of shoe and in the other, a different brand. The brand of shoe they wear in each race is determined at random. All runners are timed and are asked to run their best in each race. The results (in minutes) are given below. Runner Brand 1 Brand 2 1 31.23 32.02 2 29.33 28.98 3...
According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the...
According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the proportion of California residents who reported insufficient rest or sleep during each of the preceding 30 days is 0.081, while this proportion is 0.09 for Oregon residents. These data are based on simple random samples of 11505 California and 4766 Oregon residents. Let p1p1 be the proportion of California residents and p2p2 be the proportion of Oregon residents, and report all answers to 4...
Twelve runners are asked to run a 10-kilometer race on each of two consecutive weeks. In one of the races, the runners wear one brand of shoe and in the other a different brand. The brand of shoe they wear in which race is determined at random. All runners are timed and are asked to run their best in each race. The results (in minutes) are given below: Runner Brand 1 Brand 2 31.23 32.02 29.33 28.98 30.50 30.63 32.20...
Recent incidents of food contamination have caused great concern
among consumers. An article reported that 33 of 80 randomly
selected Brand A brand chickens tested positively for either
campylobacter or salmonella (or both), the leading bacterial causes
of food-borne disease, whereas 69 of 80 Brand B brand chickens
tested positive.
(a)
Does it appear that the true proportion of non-contaminated
Brand A chickens differs from that for Brand B? Carry out a test of
hypotheses using a significance level 0.01....
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
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