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A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours.
A sample of high school seniors showed that 18 of 60 who owned PlayStation 3 spent more than an hour a day playing games, compared with 32
Systolic Blood Pressure for Women: Systolic blood pressure results from contraction of the heart. Based on past results from the National Health Survey
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml.
An experiment was performed to measure the effect of sleep deprivation on cognitive performance. twenty college juniors were randomly selected from a group
a)Make a scatter plot of the data. What does it suggest about the correlation between X and Y? (b) Use Megastat or Excel to calculate the correlation
The lower the level of significance, the harder it is to reject the null. In sum, you want to be REALLY sure that your alternative hypothesis is correct
Supposed you were interested in knowing the mean score for a certain quiz in a statistics class with 20 students.
A recent prospective cohort study analyzed the effect of calcium plus vitamin D supplement use on the development of osteoporosis (weak and brittle bones).
CherryBerry Soda, Inc. claims that 15 percent of the population can identify its products.
Describe the five step process for hypothesis testing. Which is the most difficult step, and why
American Demographics reported the results of a survey on the planning habits of men and women.
A poll of 1,068 Americans reveals that 48% of the voters surveyed prefer the Democratic candidate for president.
Use Excel to find the mean of your players' slugging percentages and the mean of your players' salaries.
The listed values are waiting times (in minutes) of customers.
A data shows how many hours of south park do fisheries and wildlife student watch per week and then further analyzed by male / female.
StreetInsider.com reported 2002 earnings per share data for a sample of major companies (Feb. 12, 2003) Prior to 2002, financial analysts
Bob loves making candy, especially varieties of caramel, including plain, chocolate dipped caramels and chocolate dipped caramels with pecans
Using a significance level of 0.05 I want to conduct 3 hypothesis tests using the data below. I need to state my alternative and null hypotheses
I am in the military and I took a granade launcher and launched 30 rounds at a target and then measured how far from the target I was.
An independent testing laboratory has been commissioned to determine the relative fuel economy of cars, light trucks, and sport utility vehicles.
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college
Can students save money by buying their textbooks at Amazon.com? To investigate this possibility, a random sample of 15 textbooks used during the Spring
Does the type of display used in a supermarket affect the sales of products? As the regional sales manager for Aldi's Foods
A real estate agency wants to estimate the difference in the appraised values of single-family homes in two communities