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4. A recent survey of 1 047 employees of a certain company found that 28% (.28)...
A recent survey of 1044 employees found that 34% of them would lay off their bosses...
A recent survey of 1044 employees found that 34% of them would lay off their bosses if they could. Complete parts a through d below based on a random sample of 10 employees. a. What is the probability that exactly three employees would lay off their boss? The probability is ____ (Round to four decimal places as needed.) b. What is the probability that three or fewer employees would lay off their bosses? The probability is ____ (Round to four...
A recent survey of 1010 employees found that 25% of them would lay off their bosses...
A recent survey of 1010 employees found that 25% of them would lay off their bosses if they could. Complete parts a through d below based on a random sample of 10 employees. a. What is the probability that exactly three employees would lay off their boss? The probability is 0.2503 . (Round to four decimal places as needed.) b. What is the probability that three or fewer employees would lay off their bosses? The probability is 0.7759. (Round to...
in a recent survey of high school students, it was found that the amount of time...
in a recent survey of high school students, it was found that the amount of time spent on rading books per week, was normally distributed with a mean of 23 minutes. Assume the distribution of weekly reading time follows the normal distribution with a population standart deviation of 2 minutes. Suppose we select a sample of 11 high school students. A- What can we say about the shape of the distributiob of the sample mean time? ….. B- What is...
A recent survey found that 76% of all adults over 50 wear glasses for driving in...
A recent survey found that 76% of all adults over 50 wear glasses for driving in a random sample of 70 adults over 50, what is the mean and standard deviation of those that wear glasses? Round the answers to the nearest hundredth O A B O mean 15.40. standard deviation 3.47 mean: 54.60, standard deviation 3.47 C. mean 15.40, standard deviation: 7:39 D. mean: 54 60 standard deviation 7 39 O
In a survey of 35 adult Americans, it was found that the mean age (in years) that people would like to live to is 87.9 with a standard deviation of 15.5. a crtic of the survey company thought that the...
In a survey of 35 adult Americans, it was found that the mean age (in years) that people would like to live to is 87.9 with a standard deviation of 15.5. a crtic of the survey company thought that the mean age would have been lower.. at 83 years. the company used the sample data to create a 95% confidence interval and found that interval to be ( 82.58, 93.22) could the crtitics age of 83 be a plausible mean...
1) A recent survey found that a bike on a roof rack resulted in a 28%...
1) A recent survey found that a bike on a roof rack resulted in a 28% reduction in mpg (miles per gallon) for sedan cars. A random sample of 100 people is selected. Source: Consumer Reports, “The Better Way to Haul a Bike”, p. 18, May 2020. a) the standard error of all possible sample proportions of reductions in mpg in sedan cars is ________. b) 95% of the samples proportions symmetrically around the population proportion will have between ________%...
A recent national survey found that parents read an average (mean) of 10 books per month...
A recent national survey found that parents read an average (mean) of 10 books per month to their children under five years old. The population standard deviation is 5. The distribution of books read per month follows the normal distribution. A random sample of 25 households revealed that the mean number of books read last month was 12. At the .01 significance level, can we conclude that parents read more than the average number of books to their children?
A recent survey found that 76% of all adults over 50 wear glasses for driving in a random sample of 70 adults over...
A recent survey found that 76% of all adults over 50 wear glasses for driving in a random sample of 70 adults over 50, what is the mean and standard deviation of those that wear glasses? Round the answers to the nearest hundredth O A B O mean 15.40. standard deviation 3.47 mean: 54.60, standard deviation 3.47 C. mean 15.40, standard deviation: 7:39 D. mean: 54 60 standard deviation 7 39 O
(1) A survey found that the American family generates an average of 17.2 pounds of glass...
(1) A survey found that the American family generates an average of 17.2 pounds of glass garbage each year. Assume that standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between more than 18 pounds. Assume that the sample is taken from a population normally distributed. (2) The average weight of 40 randomly selected minivans was 4150 pounds. The population standard deviation was 480. Find the 99%...
A recent national survey found that high school students watched an average (mean) of 7.0 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.0 DVDs per month with a population standard deviation of 0.60 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 43 college students revealed that the mean number of DVDs watched last month was 6.50. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? a. State the null...
A recent survey of 1010 employees found that 25% of them would lay off their bosses if they could. Complete parts a through d below based on a random sample of 10 employees. a. What is the probability that exactly three employees would lay off their boss? The probability is 0.2503 . (Round to four decimal places as needed.) b. What is the probability that three or fewer employees would lay off their bosses? The probability is 0.7759. (Round to...
A recent survey found that 76% of all adults over 50 wear glasses for driving in a random sample of 70 adults over 50, what is the mean and standard deviation of those that wear glasses? Round the answers to the nearest hundredth O A B O mean 15.40. standard deviation 3.47 mean: 54.60, standard deviation 3.47 C. mean 15.40, standard deviation: 7:39 D. mean: 54 60 standard deviation 7 39 O
A recent national survey found that parents read an average (mean) of 10 books per month to their children under five years old. The population standard deviation is 5. The distribution of books read per month follows the normal distribution. A random sample of 25 households revealed that the mean number of books read last month was 12. At the .01 significance level, can we conclude that parents read more than the average number of books to their children?
A recent survey found that 76% of all adults over 50 wear glasses for driving in a random sample of 70 adults over 50, what is the mean and standard deviation of those that wear glasses? Round the answers to the nearest hundredth O A B O mean 15.40. standard deviation 3.47 mean: 54.60, standard deviation 3.47 C. mean 15.40, standard deviation: 7:39 D. mean: 54 60 standard deviation 7 39 O
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