A survey of 1020 workers in a certain year found that 66% of the respondents spend a total of $40 or less on lunch each week
A survey of 1020 workers in a certain year found that 66% of the respondents spend a total of $40 or less on lunch each week. If 10 of the workers who participated in the survey were chosen at random, what is the probability that at most 3 of them spend a total of $40 or less on lunch each week? (Round your answer to three decimal places.)
Homework Answers
| here this is binomial with parameter n=10 and p=0.66 | |||
| P(X<=3)= | ∑x=0a (nCx)px(1−p)(n-x) = | 0.022 |
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A survey of 1020 workers in a certain year found that 66% of the respondents spend a total of $40 or less on lunch each week
8.4.12 A survey of 1020 workers in a certain year found that 65% of the respondents...
8.4.12 A survey of 1020 workers in a certain year found that 65% of the respondents spend a total of $40 or less on lunch each week. If 10 of the workers who participated in the survey were chosen at random, what is the probability that at most 3 of them spend a total of $40 or less on lunch each week? (Round your answer to three decimal places.)
ol. Stress at work: In a poll conducted by the General Social Survey, 80% of respondents...
ol. Stress at work: In a poll conducted by the General Social Survey, 80% of respondents said that their jobs were sometimes or always stressful. One hundred and ninety workers are chosen at random. Use the TI-84 Plus calculator as needed. Round your answer to at least four decimal places. (a) Approximate the probability that 140 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 155 workers find their jobs stressful. (c) Approximate the probability...
Stress at work: In a poll conducted by the General Social Survey, 78% of respondents said...
Stress at work: In a poll conducted by the General Social Survey, 78% of respondents said that their jobs were sometimes or always stressful. Two hundred workers are chosen at random. Use the TI-84 Plus calculator as needed. Round your answer to at least four decimal places. (a) Approximate the probability that 145 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 159 workers find their jobs stressful. (c) Approximate the probability that the number...
A research company conducted a survey and collected demographic information on the respondents from each country....
A research company conducted a
survey and collected demographic information on the respondents
from each country. To the right is a table showing the number of
people with various levels of education in five countries. Complete
parts a) through d).
and collected A research company conducted a domogranhic information on the respondents from each country Some Primary Post- No answer College Total To the right is a table showing the number of people with various Country levels of education in...
Bonnectmath.com/alekscgl/x/sl.exe/1o_u-IgNsikr7;8P3JH-IV-TghIJBUeBr8WON7n|F20J6p6bnJC_JULy3RSLYwaekZrWorMFDKT7SWNMOGO Stress at work: In a poll conducted by the General Social Survey, 80% of respondents...
Bonnectmath.com/alekscgl/x/sl.exe/1o_u-IgNsikr7;8P3JH-IV-TghIJBUeBr8WON7n|F20J6p6bnJC_JULy3RSLYwaekZrWorMFDKT7SWNMOGO Stress at work: In a poll conducted by the General Social Survey, 80% of respondents said that their jobs were sometimes or always stressful. Two hundred workers are chosen at random. Use the TI-84 Plus calculator as needed. Round least four decimal places. (a) Approximate the probability that 165 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 150 workers find their jobs stressful. (c) Approximate the probability that the number of workers who...
#9 A headline in a certain newspaper states that "most stay at first job less than...
#9
A headline in a certain newspaper states that "most stay at first job less than 2 years." That headline is based on an online poll of 280 college graduates. Among those polled, 71% stayed at their first full-time job less than 2 years. Complete parts (a) through (d). a. Assuming that 50% is the true percentage of graduates who stay at their first job less than two years, find the mean and standard deviation of the numbers of such...
The General Social Survey is an annual survey given to a random selection of about 1500...
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker....
A Gallup poll of 1,236 adults showed that 12% of the respondents believe that it is...
A Gallup poll of 1,236 adults showed that 12% of the respondents believe that it is bad luck to walk under a ladder. Suppose 30 people are selected at random from among the 1,236 were polled, and further suppose we want to calculate the probability that at least 2 of the 30 believe it is bad luck to walk under a ladder. Given that the 30 subjects were selected without replacement, those selections are not independent. Can the probability be...
A survey of 2297 adults in a certain large country aged 18 and older conducted by...
A survey of 2297 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 419 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
A survey of 2288 adults in a certain large country aged 18 and older conducted by...
A survey of 2288 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 415 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
ol. Stress at work: In a poll conducted by the General Social Survey, 80% of respondents said that their jobs were sometimes or always stressful. One hundred and ninety workers are chosen at random. Use the TI-84 Plus calculator as needed. Round your answer to at least four decimal places. (a) Approximate the probability that 140 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 155 workers find their jobs stressful. (c) Approximate the probability...
Stress at work: In a poll conducted by the General Social Survey, 78% of respondents said that their jobs were sometimes or always stressful. Two hundred workers are chosen at random. Use the TI-84 Plus calculator as needed. Round your answer to at least four decimal places. (a) Approximate the probability that 145 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 159 workers find their jobs stressful. (c) Approximate the probability that the number...
A research company conducted a
survey and collected demographic information on the respondents
from each country. To the right is a table showing the number of
people with various levels of education in five countries. Complete
parts a) through d).
and collected A research company conducted a domogranhic information on the respondents from each country Some Primary Post- No answer College Total To the right is a table showing the number of people with various Country levels of education in...
Bonnectmath.com/alekscgl/x/sl.exe/1o_u-IgNsikr7;8P3JH-IV-TghIJBUeBr8WON7n|F20J6p6bnJC_JULy3RSLYwaekZrWorMFDKT7SWNMOGO Stress at work: In a poll conducted by the General Social Survey, 80% of respondents said that their jobs were sometimes or always stressful. Two hundred workers are chosen at random. Use the TI-84 Plus calculator as needed. Round least four decimal places. (a) Approximate the probability that 165 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 150 workers find their jobs stressful. (c) Approximate the probability that the number of workers who...
#9
A headline in a certain newspaper states that "most stay at first job less than 2 years." That headline is based on an online poll of 280 college graduates. Among those polled, 71% stayed at their first full-time job less than 2 years. Complete parts (a) through (d). a. Assuming that 50% is the true percentage of graduates who stay at their first job less than two years, find the mean and standard deviation of the numbers of such...
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker....
A Gallup poll of 1,236 adults showed that 12% of the respondents believe that it is bad luck to walk under a ladder. Suppose 30 people are selected at random from among the 1,236 were polled, and further suppose we want to calculate the probability that at least 2 of the 30 believe it is bad luck to walk under a ladder. Given that the 30 subjects were selected without replacement, those selections are not independent. Can the probability be...
A survey of 2297 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 419 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
A survey of 2288 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 415 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
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