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Author Archives: Anonymous

About 7.2% of all SMC students say that they plan to transfe…

About 7.2% of all SMC students say that they plan to transfer to a private school.  A random sample of 16 SMC students is chosen.  Find each of the following probabilities. Round each response to four decimal places.  What is the probability that exactly 4 of the 16 chosen students plan to transfer to a private college? [one] What is the probability that at most 4 of the 16 chosen students plan to transfer to a private college. [two]

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About 7.2% of all SMC students say that they plan to transfe…

About 7.2% of all SMC students say that they plan to transfer to a private school.  A random sample of 16 SMC students is chosen.  Find each of the following probabilities. Round each response to four decimal places.  What is the probability that exactly 5 of the 16 chosen students plan to transfer to a private college? [one] What is the probability that at least 5 of the 16 chosen students plan to transfer to a private college. [two]

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A random sample of 2301 people living in Los Angeles indicat…

A random sample of 2301 people living in Los Angeles indicated that 175 agreed with the statement, “I would like to change jobs within the next year.” Complete the following based on this information using only definitions provided in this class.  It is [un] for a person living in Los Angeles to agree with the statement because the probability of [prob] is [less].

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Determine whether the underlined value represents a paramete…

Determine whether the underlined value represents a parameter or a statistic and why.  A bank polled all 60 of its employees and determined that 55% regularly volunteer for charity. 

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240 visitors to Yosemite National Park were polled and asked…

240 visitors to Yosemite National Park were polled and asked whether they were first time visitors or repeat visitors, and what their  main interest for the current visit.  The data is recorded in the table below.  Data Table Plants Animals Hiking Rock Climbing Other First-Time Visitor 27 23 31 44 9 Repeat Visitor 22 13 35 30 6 Find each of the following probabilities.  If rounding is necessary, round to three decimal places.  What is the probability that a randomly chosen visitor is a first-time visitor?  [a1] What is the probability that a randomly chosen visitor’s main interest is plants or they are a repeat visitor?  [a2] If one visitor is randomly chosen and you know they are a repeat visitor, what is the probability that their main interest is plants? [v3]

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Find the area under the standard normal curve to the left of…

Find the area under the standard normal curve to the left of z = 2.06. 

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About 48.2% of all California residents were born in Califor…

About 48.2% of all California residents were born in California.  Suppose a random sample of 15 residents of California is chosen.   Round each of the following to four decimal places. What is the probability that exactly 7 of the sample were born in California?  [ans1] What is the probability that fewer than 7 of the sample were born in California?  [ans2]

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Determine whether or not the following represents a binomial…

Determine whether or not the following represents a binomial experiment.  About 20% of all transactions in U.S. stores are by cash payments.  At a certain store, a clerk records 100 transactions to see how many are paid by cash. 

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Find the area under the standard normal curve to the left of…

Find the area under the standard normal curve to the left of z = 1.57.

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What is the probability that -0.98 < z < 1.48 in a standard...

What is the probability that -0.98 < z < 1.48 in a standard normal distribution?  

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