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In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 106. What is the probability that the sample proportion will be within 7 percent of the population proportion? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamaps approach and calculations Answer 0.0485 (Enter your answer as a number accurate to 4 decimal places.)
A Food Marketing Institute found that 34% of households spend more than $125 a week on groceries. Assume the population proportion is 0.34 and a simple random sample of 362 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.35? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamaps approach and calculations (Enter your answer as a number accurate to 4 decimal places.)
A Food Marketing Institute found that 46% of households spend more than $125 a week on groceries. Assume the population proportion is 0.46 and a simple random sample of 76 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is more than than 0.38? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamaps approach and calculations. Answer-1.0000* (Enter your answer as a number accurate to 4 decimal places.)
Aeng agarine ikan) pord t e number of weeks an individual s nemployed is 38 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 38 weeks and that the population standard deviation is 6 weeks. Suppose you would like to select a random sample of 35 unemployed individuals for a follow-up study. Find the probability that a single randomly selected value is less than 39. P(X<39) 03949 Find the probability that a sample of sizen 35 is randomly selected with a mean less than 39. P(M< 39)0.0220 Enter your answers as numbers accurate to 4 decimal places.
A leading magazine (like Barrons) reported at one time that the average number of weeks an individual is unemployed is 35 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 35 weeks and that the population standard deviation is 3.1 weeks. Suppose you would like to select a random sample of 87 unemployed individuals for a follow-up study. Find the probability that a single randomly selected value is greater than 35.3 PX> 35.3)- (Enter your answers as numbers accurate to 4 decimal places.) Find the probability that a sample of size n 87 is randomly selected with a mean greater than 35.3. PM> 35.3)- Enter your answers as numbers accurate to 4 decimal places.)
A leading magazine (like Barrons) reported at one time that the average number of weeks an individual is unemployed is 32.9 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 32.9 weeks and that the population standard deviation is 8.6 weeks. Suppose you would like to select a random sample of 143 unemployed individuals for a follow-up study. Find the probability that a single randomly selected value is between 31.5 and 32.8. P(31.5<X< 32.8)-10.0600 Find the probability that a sample of sizen 143 is randomly selected with a mean between 31.5 and 32.8 P31.5M 32.8)- 03267 Enter your answers as numbers accurate to 4 decimal places.
math   Statistics-And-Probability   
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b.i 160 sample 와39,n= こ19-070 > 10 ane I 60 0-1075 0.03923 ガew means to be uhre en 0.7(-0,07 . anol o.7S+0.07 ie. 0.68 and o. 02. Thus ร์ 0 3423 О, Зу 2-3 δ (0,2 ou 5)- (-0,2045)wlation and Sampee 362 p( tte 8annbee hoor hon eb heve e holdo 햐endent move tho < 의о-ого-ay)-P(1Ko.yoIS ?( 玉(o.yol 6)二 군 2 0 02y 0.6S91 ニ Inu) OWGxbSy 0.0572 b76 P(24-1, 3g): 1-玉(-1,399) 本(1,899)ニ. 0.9177 dz ㄷ 1_6 6 0.5636 A 6 6 XN30, 1.oryz,) 0192 서 V) 35-3 XEN3s, 0 3323) 스 o.3323. 0.331 6 3323 03323 】一軍(0,9 02), 1-0.0389 0 16

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