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If a person bought 1 share of Google stock within the last year, what is the probability that the stock on that day closed at less than the mean for that year? Hint: Use percentiles, do not calculate the mean. The answer is easy.
If a person bought one share of Google stock within the last year, what is the probability that the stock on that day closed at more than $800? Hint: Use Excel to find the mean and standard deviation. Then find the z score. Then find the probability using the Standard Normal Table. If a person bought 1 share of Google stock within the last year, what is the probability that the stock on that day closed within $45 of the mean for that year? Hint: Find two z scores and use the Standard Normal Table. Suppose a person within the last year claimed to have bought Google stock at closing at $700 per share. Would such a price be considered unusual? Explain by using the Empirical Rule; do not find the max or min values of the daily closing prices. At what prices would Google have to close at in order for it to be considered statistically unusual? You should have a low and high value. Use the Empirical Rule.What are Q1, Q2, and Q3 in this data set? Use Excel to find these values.
Is the normality assumption that was made at the beginning valid? Why or why not? Hint: Construct a histogram and include this in your submission.
Find the probability that the mailed item was First Class or it went to a home.Find the probability that the mailed item was an Ad.
Construct a 90% confidence interval for the mean percentage of hotel reservations being cancelled on the day of the booked stay that falls between 1.1%-3.4%.
What is the probability that the difference between the sample mean and the population mean is less than 0.01? 5. What is the likelihood the sample mean is greater than $ 3.87?
Estimate the relative risk of neurological impairment for children exposed to secondary smoking, and calculate a 95% con?dence interval for this risk.
Is it reasonable to conclude that the mean weekly salary of school teachers is lower at a .05 level of significance? Why?
They have collected data on gender, shoe size, and height to see if they can change their business model to include only one size of shoes regardless height or gender of the wearer.
Set up a hypothesis test to validate this claim. Using a significance level of .01 to test this hypothesis, what is your decision rule
A bookcase contains 3 statistics books and 4 biology books. If 2 books are chosen at random, find the chance that both are statistics books.
Explain to someone who knows no statistics why the two polls can give such widely differing results and which poll is likely to more reliable.
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
Your population mean has always been 9 customers per hour. The sample standard deviation is 4. The sample size is 25. The sample mean is 8.
Determined that their mean waiting time was 15 minutes and that the standard deviation was 4 minutes. The 88% confidence interval for the population mean of waiting times is?
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