Calculus and Above

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3 questions Suppose a university advertises that its average
3 questions Suppose a university advertises that its average class size is 33 or less. A student organization is concerned that budget cuts have led to increased class sizes and would like to test thi… read more
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N 2016 Americans owed​ $1.3 trillion in student loans. The
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Obtaining a​ driver's license at the earliest eligible age
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The concerns about the impact of technology on our lives are
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According to a government​ agency, the average workweek for
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1. A health journal found that 56.3​% of college students
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Obtaining a​ driver's license at the earliest eligible age
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Regular gasoline averaged ​$2.95 per gallon in February
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According to a government​ agency, the average workweek for
According to a government​ agency, the average workweek for an adult in September 2018 was 34.3 hours. Assume the population standard deviation for the number of hours worked per week is 4.0 hours. A … read more
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A road averages 2,025 vehicles per day with a standard
A road averages 2,025 vehicles per day with a standard deviation of 505 vehicles per day. A traffic counter was used on this road on 36 days that were randomly selected. a. What is the probability tha… read more
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Researchers found that a person in a particular country
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According to​ eMarketer.com, 36​% of mobile phone users in
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In a survey of 3156 adults aged 57 through 85​ years, it was
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According to a survey in a​ country, 38​% of adults do not
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According to a survey in a​ country, 17​% of adults do not
According to a survey in a​ country, 17​% of adults do not own a credit card. Suppose a simple random sample of 400 adults is obtained. Complete parts​ (a) through​ (d) below.​(a) Describe the sampling distribution of ModifyingAbove p with caret​, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of ModifyingAbove p with caret below. A. Not normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis greater than or equals 10 B. Approximately normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis greater than or equals 10 C. Not normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis less than 10 D. Approximately normal because n less than or equals 0.05 Upper N and np left parenthesis 1 minus p right parenthesis less than 10 Determine the mean of the sampling distribution of ModifyingAbove p with caret. mu Subscript ModifyingAbove p with caret Baseline equals nothing ​(Round to two decimal places as​ needed.) Determine the standard deviation of the sampling distribution of ModifyingAbove p with caret. sigma Subscript ModifyingAbove p with caretequals nothing ​(Round to three decimal places as​ needed.)​(b) What is the probability that in a random sample of 400 ​adults, more than 21​% do not own a credit​ card? The probability is nothing.​(Round to four decimal places as​ needed.) Interpret this probability. If 100 different random samples of 400 adults were​ obtained, one would expect nothing to result in more than 21​% not owning a credit card.​(Round to the nearest integer as​ needed.)​(c) What is the probability that in a random sample of 400 ​adults, between 16​% and 21​% do not own a credit​ card? The probability is nothing.​(Round to four decimal places as​ needed.) Interpret this probability. If 100 different random samples of 400 adults were​ obtained, one would expect nothing to result in between 16​% and 21​% not owning a credit card.​(Round to the nearest integer as​ needed.)​(d) Would it be unusual for a random sample of 400 adults to result in 64 or fewer who do not own a credit​ card? Why? Select the correct choice below and fill in the answer box to complete your choice.​(Round to four decimal places as​ needed.) A. The result is not unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is nothing​, which is greater than​ 5%. B. The result is unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is nothing​, which is greater than​ 5%. C. The result is not unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is nothing​, which is less than​ 5%. D. The result is unusual because the probability that ModifyingAbove p with caret is less than or equal to the sample proportion is nothing​, which is less than​ 5%. … read more
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Exit polling is a popular technique used to determine the
Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on the ballot in a large town… read more
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According to a​ study, 73​% of all males between the ages of
According to a​ study, 73​% of all males between the ages of 18 and 24 live at home. ​ (Unmarried college students living in a dorm are counted as living at​ home.) Suppose that a survey is administer… read more
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Suppose a simple random sample of size nequals150 is
Suppose a simple random sample of size nequals150 is obtained from a population whose size is Upper N equals 10 comma 000 and whose population proportion with a specified characteristic is p equals 0.… read more
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