Question
Use the Edit menu in your browser to copy the 1000 numbers obtained in the coin tossing experiments. (d) Go back to LinuStats and choose
Use the Edit menu in your browser to copy the 1000 numbers obtained
in the coin tossing experiments.
(d) Go back to LinuStats and choose the descriptive statistics page.
(e) Use the Edit menu in your browser to paste the 1000 numbers into the
data window.
(f) Choose a minimum value of 0, maximum value of 1, and window of
0.1
(g) Analyze the data by clicking the appropriate button.
(h) Copy the resulting relative frequency table and transform it into a cumulative distribution function
(i) Copy the Mean and SD (Standard Deviation) of the 1000 numbers.
Explain what this standard deviation means. I'll call these numbers
X and ?X
(j) Compare the obtained cumulative distribution function with that predicted by a Gaussian distribution with mean X and standard deviation
?X
Suppose that you take a random sample of 10,000 Americans and find that
1,111 are left- handed. You perform a test of significance to assess whether the
sample data provide evidence that more than 10% of all Americans are lefthanded, and you calculate a test statistic of 3.70 and a p-value of .0001.
Furthermore, you calculate a 99% confidence interval for the proportion of lefthanders in America to be (.103,.119). Consider the following statements: The
sample provides strong evidence that more than 10% of all Americans are lefthanded. The sample provides evidence that the proportion of left-handers in
America is much larger than 10%. Which of these two statements is the more
appropriate conclusion to draw? Explain your answer based on the results of
the significance test and confidence interval.
36. A student wanted to study the ages of couples applying for marriage licenses in
his county. He studied a sample of 94 marriage licenses and found that in 67
cases the husband was older than the wife. Do the sample data provide strong
evidence that the husband is usually older than the wife among couples
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