The Census Bureau's Current Population Survey shows that 30% of individuals, ages 25 and older, have...
Homework Answers
Let X denotes the number of people who will have completed four years of college in a random sample of 9 individuals.
X ~ Binomial(n = 9, p = 0.30)
The probability mass function of X is
Now,
The probability that two or more will have completed four years of college
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The
Census Bureau's Current Population Survey shows that 30% of
individuals, ages 25 and older, have...
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age...
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age of 25 have earned a high school diploma. Suppose we are going to take a random sample of 200 Americans in this age group and calculate what proportion of the sample has a high school diploma. What is the probability that the proportion of people in the sample with a high school diploma is less than 85%? 0.17 (B 0.23 C 0.20 D 0.26...
The table shows the educational attainment of the population of Mars, ages 25 and over, expressed...
The table shows the educational attainment of the population of Mars, ages 25 and over, expressed in millions. Find the probability that a randomly selected martian, aged 25 and over has completed four years of high school only or is a male. Total Years of High School Less than 4 4 only 26 15 53 - 12 Years of College Some (less than 4) 4 or more 22 25 17 50 39 Male Female Total 25 85 27 84 169...
1.)What, me marry? In the United States, 20% of adults ages 25 and older have never...
1.)What, me marry? In the United States, 20% of adults ages 25 and older have never been married, more than double the figure recorded for 1960. Select a random sample of 50 U.S. adults ages 25 and older and let Y = the number of individuals in the sample who have never married. a) Calculate the mean and standard deviation of the sampling distribution of X. b) Interpret the standard deviation from question 1 c) Would it be appropriate to...
A hypothetical population consists of eight individuals ages 13, 15, 17, 20, 22, 24, 28, and...
A hypothetical population consists of eight individuals ages 13, 15, 17, 20, 22, 24, 28, and 30 years. (Enter your answers to three decimal places.) (a) What is the probability that a person in this population is a teenager? (b) What is the probability of selecting a participant older than 30? (c) What is the probability of selecting a participant who is at least 20 years old?
The following frequency distribution shows the ages of India’s 40 richest individuals. One of these individuals...
The following frequency distribution shows the ages of India’s 40 richest individuals. One of these individuals is selected at random. Ages Frequency 30 up to 40 3 40 up to 50 8 50 up to 60 15 60 up to 70 9 70 up to 80 5 SOURCE: http://www.forbes.com. a. What is the probability that the individual is between 50 and 60 years of age? (Round your answer to 3 decimal places.) b. What is the probability that the individual...
4) You have obtained a sub-sample of 1744 individuals from the Current Population Survey (CPS) and...
4) You have obtained a sub-sample of 1744 individuals from the Current Population Survey (CPS) and are interested in the relationship between weekly earnings and age. The regression, using heteroskedasticity-robust standard errors, yielded the following results: EARN= 239.16 + 5.20×Age , R2 = 0.05, SER = 287.21., (20.24) (0.57) where Earn and Age are measured in dollars and years respectively. (a) Interpret the slope and intercept coefficients and the measure of fit. (b) The average age in this sample is...
14. The Census Bureau wants to conduct a survey to determine the percentage ofadults that buy...
14. The Census Bureau wants to conduct a survey to determine the percentage ofadults that buy clothing online. How many adults do they need to survey in order to be confident that the sample proportion is in error by no more that 2 percentage points. 15. An Airliner has a capacity for 300 passengers. If the company overbook a flight with 320 passengers, What is the probability that it will not be enough seats to accommodate all passengers. Assume that...
What percentage of the population live in their state of birth? According to the U.S. Census Bureau's American Community Survey, the figure ranges from 25% in Nevada to 78.7% in Louisiana.† The av...
What percentage of the population live in their state of birth? According to the U.S. Census Bureau's American Community Survey, the figure ranges from 25% in Nevada to 78.7% in Louisiana.† The average percentage across all states and the District of Columbia is 57.7%. The data in the DATAfile HomeState are consistent with the findings in the American Community Survey. The data are for a random sample of 120 Arkansas residents and for a random sample of 180 Virginia residents....
2. Table 1 below shows data from a survey of a random sample of people in the United States in November of 2016 (the Current Population Survey). You arc asked to do a two-sided hypothcsis test to tes...
2. Table 1 below shows data from a survey of a random sample of people in the United States in November of 2016 (the Current Population Survey). You arc asked to do a two-sided hypothcsis test to test the null hypothesis Put another way Wherc pv21 is the probability that a randomly chosen 21 year old votes and p.25 1s the proba- pv.21-pu ,25 bility that a randomly chosen 25 year old votes a) If you assume the null hypothesis...
please explain by steps! very confused 10) The average charitable contribution itemized per income tax return...
please explain by steps! very confused
10) The average charitable contribution itemized per income tax return in Pennsylvania is $792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 60% of contributions. 4:02 < Back Assignment Details STAT-10-06534 The Normal Approximation to the Binomial 11) According to American Airlines, Flight 215 from Orlando to Los Angeles is on time 90% of the time. Randomly select 150 flights and use...
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age of 25 have earned a high school diploma. Suppose we are going to take a random sample of 200 Americans in this age group and calculate what proportion of the sample has a high school diploma. What is the probability that the proportion of people in the sample with a high school diploma is less than 85%? 0.17 (B 0.23 C 0.20 D 0.26...
The table shows the educational attainment of the population of Mars, ages 25 and over, expressed in millions. Find the probability that a randomly selected martian, aged 25 and over has completed four years of high school only or is a male. Total Years of High School Less than 4 4 only 26 15 53 - 12 Years of College Some (less than 4) 4 or more 22 25 17 50 39 Male Female Total 25 85 27 84 169...
14. The Census Bureau wants to conduct a survey to determine the percentage ofadults that buy clothing online. How many adults do they need to survey in order to be confident that the sample proportion is in error by no more that 2 percentage points. 15. An Airliner has a capacity for 300 passengers. If the company overbook a flight with 320 passengers, What is the probability that it will not be enough seats to accommodate all passengers. Assume that...
2. Table 1 below shows data from a survey of a random sample of people in the United States in November of 2016 (the Current Population Survey). You arc asked to do a two-sided hypothcsis test to test the null hypothesis Put another way Wherc pv21 is the probability that a randomly chosen 21 year old votes and p.25 1s the proba- pv.21-pu ,25 bility that a randomly chosen 25 year old votes a) If you assume the null hypothesis...
please explain by steps! very confused
10) The average charitable contribution itemized per income tax return in Pennsylvania is $792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 60% of contributions. 4:02 < Back Assignment Details STAT-10-06534 The Normal Approximation to the Binomial 11) According to American Airlines, Flight 215 from Orlando to Los Angeles is on time 90% of the time. Randomly select 150 flights and use...
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