Each day, a weather forecaster predicts whether or not it will rain. For 80% of rainy days, she correctly predicts that it will rain. For 90% of non-rainy days, she correctly predicts that it will not rain. Suppose that 10% of days are rainy and 90% are non-rainy. a) What proportion of the forecasts are correct? b) Another forecaster always predicts that there will be no rain. What proportion of these forecasts are correct?

Q: A survey of 1000 college students yielded the following information: 396 students favored capital…

A: (a)   Given: A survey of 1000 college students yielded the following information: 396 students…

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A: Bayes' Theorem :  Bayes’ theorem is a mathematical formula used to determine the conditional…

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A: It is given that, $3.25 (in dimes and nickels) are distributed among 45 boys.

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A: We can find the sample proportion as below

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Q: 2. A manager samples the receipts of every fifth person who goes through the line. Out of 50 people,…

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Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: Hey there! Thank you for posting the question. Since there are multiple subparts are posted,…

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Q: Of 5,040 cellphones, 227 are found to be defective. What angle of a circle (in degrees) would show…

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Q: 4. What proportion, percent, and number of people of the people had well-being scores less than 120…

A: Answer:   X ~ Normal distribution X~ N (μ, σ) The given values are Mean = μ = 100 Standard…

Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: A company that provides and sells insurance is called insurance company.

Q: A survey of Hoosiers found that 47% are Pacers fans, 34% are Colts fans, and 35% are Pacers fans but…

A: Solution: Let A be the event that Hoosiers are Pacers fans and B be the event that Hoosiers are…

Q: If the sampled tilapia number 500, how many of these are expected to weigh between 330 and 394…

A: Given that mu =370.2 , s.d = 32.7

Q: 4) 57% of kids can't wait for spring break. How many kids on average would we need to survey to find…

A: Geometric Distribution: Let us assume there is a sequence of trials, each having two outcomes, say…

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A: Researchers use probability table to represent probabilities of occurrence of two events.

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A:

Q: If only 15% of people asked to mail in a survey respond, this is an example of

A: Given that  Only 15% of people asked to mail in a survey respond.  We know that  Response bias :…

Q: In Fall 2013, 10.5 million undergraduate students attended a 4-year institution full-time. Of those,…

A: Total students in institution = 10.5 million number of Students under age 25 = 8,540,000 number of…

Q: Say that there are five populations, and we need to test for difference of population means.  If we…

A: Say that there are five populations, and we need to test for difference of population means. We test…

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Q: A survey of Hoosiers found that 57% are Pacers fans, 44% are Colts fans, and 35% are Pacers fans but…

A: Let P= Pacer fans  C= Colt fans So, P(P)= 57% = 0.57  P(C)=44%=0.44 So, 57% - 35%=22%= 0.22 are…

Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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A: From the given information, k=3 n=10 The total number of participants in between subjects design is…

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A: Let p be the population proportion of full-time employees.

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Q: An estimated 333 out of every 252525 men are left-handed. What percent of men are left-handed?

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Q: A survey of 600 school employees yielded the following information: 325 were instructors, 442 were…

A: Given data, instructors= 325 full-time faculty=442 instructors were full-time faculty=255   No of…

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Q: The national Park service monitors streams in Rainier national park for pollution and fish spawning…

A: Solution: Let A be the event that a stream polluted is 0.62 and B be the event that the streams in…

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Q: In a sample of 310 people, 186 completed only high school, 24 completed only some college, 93…

A: Given data A sample of 310 people is given. 186 completed only high school. 24 completed only some…

Q: Suppose that insurance companies did a survey. They randomly surveyed 450 drivers and found that 300…

A: Part a:          x = 300         n = 450         p' = 300/450 = 0.6667   Part b:  X is the number of…

Q: veterinary clinic reports that out of 3,412 animals registered at the clinic, 1,712 are dogs, 1,012…

A: Given : A veterinary clinic reports that out of 3,412 animals registered at the clinic, 1,712 are…

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A: Given information: Total number of students n=30 The scores achieved by the respective number of…

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A: Given data: The given table is, Blood Types A+ A- B+ B- AB+ AB- O+ O- Percent 35.9 6.3 9.5 1.5…

Q: A survey of a magazine's subscribers indicates that 50% own a home, 80% own a car, and 90% of the…

A: Givensubscribers own a home = 50%subscribers own a car = 80%subscribe own a car given that they own…

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A: Price of tablet = $243 Price of laptop computers = $763 Price of Cell phone = $ 158 Price of DVR =…

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Q: In a survey of 3367 adults aged 57 through 85​ years, it was found that 84.2​% of them used at least…

A: A survey of 3,367 adults aged 57 through 85​ years. There is 84.2​% of them used at least one…

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Q: time a 10-year-old American child spends playing outdoors per day is between 19.28 and 24.08…

A: Given Data Lower limit = 19.28 upper limit = 24.08

Q: The article "Economy Low, Generosity High" (USA TODAY, July 28, 2009) noted that despite a weak…

A: a) The data represents the percentage of “Americans volunteered in their communities in 2008” for…