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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.
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
Explain what an outlier is. Then, if there are any outliers in the Project 1 Data Set, what are they? If there are no outliers, say no outliers.
Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 44. Determine the value of x from the following information.
Define the rejection region. State the statistical decision.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
At 95% confidence using the critical value approach, test to see if the percentage of defective systems produced by x-Game has exceeded the industry standard.
What is the probability that the average will be 140 lbs or longer if the individuals are randomly selected and calculate the z-score for an x of 21.5 from a sample of size 25.
The 95% confidence interval is defined as ____. a) an interval such that we are 95% confident that the population value lies within the interval b) an interval such that the probability is 0.95 that the interval contains the population value
If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.
a. What is the mean of the sampling distribution?
The grades of a sample of 5 students, selected from a large population, are given below. Determine a point estimate for the variance of the population.
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