In a recent poll, 58% of the surveyed said that they will take shorter trips to keep the vacation expenses down. If 3 people are randomly selected, what is the probility that all 3 will take shorter trips?
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In a recent poll, 58% of the surveyed said that they will take shorter trips to keep the vacation ...
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The probability in recent polls of vacation expenses is examined.
1. Letter and Digit. A new computer owner creates a password consisting of two characters. She randomly selects a letter of the alphabet for the first character and a digit (0,1,2,3,4,5,6,7,8,9) for the second character. What is the probability that her password is "k9"? Would this password be effective as a deterrent against so
1. Find the probability that a standard normal random variable will assume a value between:
a. z = 1.5 and z = .75
b. Greater than 1.25
c. Find a z such that 70% of the area is above that value.
2. In recent years, the use of the telephone as a data collection instrument for opinion polls has been steadily incr
1) A student reads that a 95% confidence interval for the mean body mass index (BMI) of young American women is 26.8 ± 0.6. Asked to explain the meaning of this interval, the student says, "95% of all young women have BMI between 26.3 and 27.4." Is this explanation correct? Explain your answer.
2) You ask another student to
A poll was taken to determine the birthplace of a class of college students. Below is a chart of the results.
a. What is the probability that a female student was born in Orlando?
b. What is the probability that a male student was born in Miami?
c. What is the probability that a student was born in Jacksonville?
Gender
The Republican party is interested in studying the number of Republicans that might vote in a particular Congressional district. Assume that the number of voters is binomially distributed by party affiliation (either Republican or not Republican).
If ten people show up at the polls, determine the following:
Binomial distri
The Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip. 19% responded that it was for an internal company visit. Suppose 950 business travelers are randomly selected.
a. What is the probability that more than 25% of the business traveler
Can anyone give me 2 or more examples of a comparison between the old times and the present day? For example: Why do people care about their weight in the present day than in the olden days? Can you formulate a hypothesis similar to this statement that can be tested, and how would it be tested?
Problem 2. A recent study of the hourly wages of maintenance crew members for major airlines showed that the mean hourly salary was $20.50, with a standard deviation of $3.50. If we select a crew member at random, what is the probability the crew member earns: a. Between $20.50 and $24.00 per hour? b. More than $24.00 per hour?
