Calculus and Above

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1. A health journal found that 56.3​% of college students
1. A health journal found that 56.3​% of college students who lived in coed dormitories consumed alcohol weekly​ (compared with​ 26.5% who lived in​ single-sex dormitories). A random sample of 150 stu… read more
Scott
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A random sample of 375 bolts from machine A contained 41
A random sample of 375 bolts from machine A contained 41 defective bolts, while an independently chosen, random sample of 325 bolts from machine B contained 32 defective bolts. Let p1 be the proportio… read more
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A student is making independent random guesses on a test.
A student is making independent random guesses on a test. The probability the student guess correctly is 0.1 for each question. Assume that the guesses are independent. Find the probability of at leas… read more
rajeevanpillai
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A brokerage survey reports that 25% of all individual
A brokerage survey reports that 25% of all individual investors have used a discount broker (one that does not charge the full commission). If a random sample of 95 individual investors is taken, appr… read more
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An ecologist randomly samples 15 plants of a specific
An ecologist randomly samples 15 plants of a specific species and measures their heights. He finds that this sample has a mean of 18 cm and a standard deviation of 2 cm. If we assume that the height m… read more
Kofi
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Multiple Choice Strategy: Some students have suggested that
Multiple Choice Strategy: Some students have suggested that if you have to guess on a multiple-choice question, you should always choose C. Carl, the student, wants to investigate this theory. He is a… read more
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Multiple Choice Strategy: Some students have suggested that
Multiple Choice Strategy: Some students have suggested that if you have to guess on a multiple-choice question, you should always choose C. Carl, the student, wants to investigate this theory. He is a… read more
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Estion A sociologist is studying the prevalence of crime in
estionA sociologist is studying the prevalence of crime in one major city. In a sample of 200randomly selected residents, 62say that they have been victimized by a criminal. Based on this sample, cons… read more
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A researcher believes that about 70% of the seeds planted
A researcher believes that about 70% of the seeds planted with the aid of a new chemical fertilizer will germinate. He chooses a random sample of 115 seeds and plants them with the aid of the fertiliz… read more
akch2002
Master's Degree
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Suppose that 16 % of the population of the U.S. is
Suppose that 16 % of the population of the U.S. is left-handed. If a random sample of 160 people from the U.S. is chosen, approximate the probability that at most 26 are left-handed. Use the normal ap… read more
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Suppose that of the people in a large city have used a
Suppose that of the people in a large city have used a hospital emergency room in the past year. If a random sample of people from the city is taken, approximate the probability that fewer than used a… read more
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A researcher believes that about 70% of the seeds planted
Second opinion] A researcher believes that about 70% of the seeds planted with the aid of a new chemical fertilizer will germinate. He chooses a random sample of 115 seeds and plants them with the aid… read more
Sandhya_sharma
Master's Degree
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The scores on an examination in biology are approximately
Second opinion] The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this exa… read more
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Master's Degree
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The following data were randomly drawn from an approximately
The following data were randomly drawn from an approximately normal population. 2, 3, 8, 11, 16 Send data to Excel Based on these data, find a confidence interval for the population standard deviation… read more
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Question 1 Assume that the weight loss first month
Question 1 Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform dis… read more
Ryan
Bachelor's Degree
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1. Five males with a particular genetic disorder have one child
1. Five males with a particular genetic disorder have one child each. The random variable x is the number of children among the five who inherit the genetic disorder. Determine whether the table descr… read more
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Bachelor's Degree
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I need help with a intoduction to statistics quiz. 20 questions
I need help with a intoduction to statistics quiz. 20 questions and they are multiple choice.… read more
Stevewh
Teacher
Bachelor's Degree
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1.Assume that the weight loss for the first month of a diet
1.Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution… read more
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