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  3. 1. the weight of 6-week-old poults (juvenile turke

1. The weight of 6-week-old poults (juvenile turkeys) are normally distributed with a mean 8.6 pounds...

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Statistics

1. The weight of 6-week-old poults (juvenile turkeys) arenormally distributed with a mean 8.6 pounds and standard deviation1.9 pounds. Find the first quartile of the weight.

A) 8.80 lb B) 8.06 lb C) 6.60 lb D) 7.33 lb

2. A gardener buys a package of seeds. Eighty-seven percent ofseeds of this type germinate. The gardener plants 130 seeds.Approximate the probability that 81% or more seeds germinate.

A) 0.9761 B) 0.9884 C) 0.9904 D) 0.9842

3. A population has a standard deviation σ = 20.2. Howlarge a sample must be drawn so that a 95% confidence interval forμ will have a margin of error equal to 4.2?

4. A college admissions officer takes a simple random sample of120 entering freshmen and computes their mean mathematics SAT scoreto be 448. Assume the population standard deviation is 116. Basedon a 98% confidence interval for the mean mathematics SAT score, isit likely that the mean mathematics SAT score for entering freshmenclass is greater than 464? (Hint: you should first construct theconfidence interval for the mean mathematics SAT score.). AnswerYes or No and give the reasoning for youranswer.

Answer & Explanation Solved by verified expert
4.4 Ratings (674 Votes)
Question 1 X N 86 19 P X x 25 025 To find the value of x Looking for the probability 025 in standard normal table to calculate Z score 06745 Z X 06745 X 86 19 X 733 P X 733 025 D 733 lb Question 2 Condition check for Normal Approximation to    See Answer
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