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Safe T cigarettes claim that their product has "low tar." Government standards are that this claim is invalid if there are more than 13.5mg tar per cigarette. A sample of five Safe T cigarettes gives 14.0, 13.7, 13.9, 13.8, and 14.1 mg of tar. Is there sufficient evidence at the alpha=0.05 significance level for the government to take action against safe T cigarettes?
My initial thought is:Ho: mean > 13.5Ha: mean <= 13.5
Not sure which test statistic to use.
The function that defines the probability distribution of a continuous random variable is a?For a continuous random variable x, the probability density function f(x) represents.
A test of hypothesis is conducted at the .05 level of significance to test either or not the population correlation is zero.
Sample mean is 12.2 days and sample standard deviation is 10 days. How many personnel files would director have to choose to evaluate to within 2 days with 99% confidence interval?
Strack, Martin, and Stepper (1988) found that people rated cartoons as funnier when holding a pen in their teeth (which forced them to smile) than when holding a pen in their lips (which forced them to frown). For this study, identify the independ..
Find out the probability that the return for common stocks will be more than 0%.
What does the intercept mean in this context? What is the estimated percent decline in visual field per year?
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
Recently, students in a marketing research class were interested in the driving behavior of students. Specifically, the marketing students were interested if exceeding the speed limit was related to gender.
National average for 2-year leases is 30,000 miles. Select the suitable hypothesis.
let Xn be number of people selected until first person with non-blue eyes shows up, and let X be number of people select until first person with different eye color to preceding people shows up. Find out E(Xb), E(Xn) and E(X).
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
Suppose you were preparing two-way tables of percentages for the following pairs of variables. How would you run the percentages?
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