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Question 1:
X is normally distributed with a mean of 250 and a standard deviation of 40. What value of X does only the top 15% exceed?
Question 2:
Travelbyus is an Internet-based travel agency wherein customers can see videos of the cities they plan to visit. The number of hits daily is a normally distributed random variable with mean of 10,000 and a standard deviation of 2,400:
a) What is the probability of getting more than 12,000 hits?
b) What is the probability of getting fewer than 9,000 hits?
Find the distribution of the test statistic when the null hypothesis is true, and then show how to get a test size alpha= 0.10
Using a spreadsheet, create a table that shows the relationship among the units of heights of people in centimeters, inches and feet in the range of 150cm to 2m. Use increments of 5cm.
The weight of wrestlers is normally distributed with a mean of 300 pounds and a standard deviation of 40 pounds. What is the probability that a particular wrestler will weigh less than 250 pounds?
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
State the hypotheses for a chi-squared test in the context of this problem. Calculate the expected matrix and describe what it represents. Calculate the test statistic. Describe what this represents and answer the question posed.
The weight of an almond is normally distributed with mean 0.05 ounce and standard deviation of 0.015 ounce. Find the probability that a package of 100 almonds will weigh between 4.3 and 5.3 ounces.
What is the difference between the R and R-squared terms? What does each tell you? How large should the R-squared term be if you want to show that the two variables are practically related?
If 9 measurements are randomly selected from this population, what is the probability that the sample mean will exceed 104?
Sample of 1500 voters was taken and the number who are voting yes is recorded. What is the probability that more than 50% of those 1500 vote yes?
Drug Store News (September2002) provided data on annual pharmacy sales for the leading pharmacy retailers in the United States. Show a stem-and-leaf display.
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales of a product. the data for the sample are shown below?
Either about $800,000 or about $2.2 million depending on which "average" it used. Which type of "average" does the $800,000 represents?
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