English, 22.08.2019 13:00 ernie27

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

Show answers

Another question on English

English, 21.06.2019 13:10

Iam not sure about this one is there anyway you can ? young, like de sacy and akerblad before him, decided their demotic equivalent must be a group of characters that occurred fourteen times. which answer option best describes the sentence? this sentence is biased because it reflects the belief that young was smarter than de sacy and akerblad. this sentence is biased because it reflects the belief that young’s ideas were unreasonable. this sentence is unbiased because it simply states a fact about something that young believed. this sentence is unbiased because it simply states a fact about why young was more successful than de sacy and akerblad.

Answers: 3

Answer

English, 21.06.2019 22:00

Read the excerpt below and answer the question. she was a small woman, short and straight-waisted like a child in her brown cotton gown. her forehead was mild and benevolent between the smooth curves of gray hair; there were meek downward lines about her nose and mouth; but her eyes, fixed upon the old man, looked as if the meekness had been the result of her own will, never of the will of another. in at least one hundred words, explain how this excerpt uses explicit and implicit details to describe sarah penn.

Answers: 1

Answer

English, 22.06.2019 00:30

Which image from those paintings does not demonstrate the “suffering” auden describes in his poem?

Answers: 2

Answer

English, 22.06.2019 02:30

Which statements describe the last two lines of a shakespearean sonnet? select three options.

Answers: 1

Answer

You know the right answer?

Mini-project: cents and the central limit theorem
1. collect a sample of at least 50 pennies...