Calculus and Above

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Q18 A presidential candidate's aide estimates that, among
q18 A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at least . If out of a random sample of college students e… read more
Keith Pelletier
Keith Pelletier
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A presidential candidate's aide estimates that, among all
A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at most . If out of a random sample of college students expres… read more
Kofi
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Q14 A presidential candidate's aide estimates that, among
q14 A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at least . If out of a random sample of college students e… read more
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Keith Pelletier
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Q17 A presidential candidate's aide estimates that, among
q17 A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at least . If out of a random sample of college students e… read more
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Keith Pelletier
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A multiple-choice examination consists of 95 questions, each
A multiple-choice examination consists of 95 questions, each having possible choices a, b, c, and d. Approximate the probability that a student will get more than 20 answers correct if he randomly gue… read more
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The manufacturer of a fertilizer guarantee that, with the
the manufacturer of a fertilizer guarantee that, with the aid of the fertilizer, 70% of planted seeds will germinate. Suppose the manufactures is correct. If 9 seeds planted with the fertilizer are ra… read more
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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
DebdattaBhattacharya
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Recorded here are the germination times (in days) for ten
Recorded here are the germination times (in days) for ten randomly chosen seeds of a new type of bean: 13, 12, 19, 11, 21, 19, 17, 15, 22, 15 Send data to Excel Assuming that germination times are nor… read more
akch2002
akch2002
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The lifetime of a certain brand of electric light bulb is
The lifetime of a certain brand of electric light bulb is known to have a standard deviation of 53 hours. Suppose that a random sample of 90 bulbs of this brand has a mean lifetime of 483 hours. Find … read more
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akch2002
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The mean diastolic blood pressure for a random sample of 60
The mean diastolic blood pressure for a random sample of 60 people was 87 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 8 millimeters of mercur… 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
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akch2002
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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
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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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A brokerage survey reports that 34% of all individual
A brokerage survey reports that 34% of all individual investors have used a discount broker (one that does not charge the full commission). If a random sample of 75 individual investors is taken, appr… read more
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I'm going to try to figure out how to snip it... The
I'm going to try to figure out how to snip it... The standard deviation of the daily demand for a product is an important factor for inventory control for the product. Suppose that a pharmacy wants to… read more
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The manufacturer of a fertilizer guarantees that, with the
The manufacturer of a fertilizer guarantees that, with the aid of the fertilizer, 70 %of planted seeds will germinate. Suppose the manufacturer is correct. If 6seeds planted with the fertilizer are ra… read more
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According to a report by the US Fish and Wildlife Service,
According to a report by the US Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolic River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. A… read more
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