Mini-project: cents and the central limit theorem
1. collect a sample of at least 50 pennies...
Mini-project: cents and the central limit theorem
1. collect a sample of at least 50 pennies by setting aside all the pennies you receive in change for several days. do not use pennies from your penny jar – you want pennies that are in circulation now. for each of your pennies, record its age (subtract its date from the current year).
2. use your data to construct a histogram of the ages of your pennies. describe its shape. are there any outliers? report the mean and standard deviation for the ages of your collection of pennies. you do not have to include your actual histogram.
3. take 20 random samples of size 5 from your collection of pennies (yes, with replacement); for each sample, compute its mean.
4. use your sample means to construct a histogram using the same scale as your histogram from part 2. describe the shape of this new histogram. are there any outliers? why does your histogram have this shape? report the mean and standard deviation for your set of sample means. compare these numbers to the numbers from part 2. what do you observe? you do not have to include your actual histogram.
5. the histogram you made in part 4 is a picture of the sampling distribution of the sample mean for samples of size 5 (chosen randomly from the population of pennies like yours). without actually taking any more samples, describe the sampling distribution of the sample mean for samples of size 25 and say what the mean and standard deviation would be.
Answers: 1
Another question on English
English, 21.06.2019 15:30
Some critics argue that hamlet is a problem play others argue that it is a tragedy explain the difference between a problem playing a tragedy identify the characteristics of hamlet's that are typical probably that those that are typical of tragedy then decide which you believe is it is and explain why your answer should be at least 250 words
Answers: 3
English, 21.06.2019 23:00
Read the excerpt from a supporting opinion of the supreme court’s ruling in plessy v. ferguson, 1896. laws permitting, and even requiring, their separation in places where they are liable to be brought into contact do not necessarily imply the inferiority of either race to the other, and have been generally, if not universally, recognized as within the competency of the state legislatures in the exercise of their police power. how does this relate to the premises of brown v. board of education? the brown case addresses whether state legislatures are equipped to judge the quality of education offered at segregated schools. the brown case addresses whether authorities believe that one race is inferior to another when creating public schools. the brown case addresses whether these laws inherently deny certain citizens equal protection under the law. the brown case addresses the legality of using police power to monitor public places separated by race.
Answers: 3
English, 22.06.2019 03:00
In the odyssey - amphimedon, what motivates odysseus to dress like a beggar? a.)he is trying to be humble. b.)he wants to surprise penelope. c.)he is angry at amphimedon. d.)he wants revenge against the suitors.
Answers: 1
English, 22.06.2019 03:40
Buckminster boy. she glared at him. "lizzie, i swear to you, as sure as i'm standing right here—that's a lie. every bit of it. every single bit." "my granddaddy said it was a lie, too." she leaned her head to one side and looked at him steadily. "so why haven't you been down to the island? " "so only you get to ask questions now? " "yes." she waited. "i haven't been down to the island because my father believes that you were using me to you stay on malaga island." "well," she said slowly. "well." "i didn't believe it, either." the sea breeze lay at their feet panting, hoping they would play with it again. based on what turner and lizzie say, which is the best conclusion that can be drawn? they are angered by the lies the adults have been spreading. neither of them is able to fully trust what the other is claiming. each trusts the other and cares a great deal about their friendship. both are worried about the troubles their friendship may bring.
Answers: 2
You know the right answer?
Questions
Biology, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
English, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
English, 11.12.2020 06:50
Business, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
Computers and Technology, 11.12.2020 06:50
Mathematics, 11.12.2020 06:50
