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When testing for the difference between the variances of two population with sample sizes of n1=8 and n2=10, the number of degrees of freedom are?
A survey was conducted to measure height off men. In survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.2 inches and a standard deviation of 2.0 inches.
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
a manufacturer wants to increase the absorption capacity of a sponge. based on past data the average sponge could
an instructor for a stat class of 250 students decided that she was going to curve the exam grades if the average is
construct 90 95 and 99 percent confidence intervals for the population mean and state the practical and problistic
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
The heights of north American women are normally distributed with a mean of 64 inches and a standard deviation of 2 inches.
a random variable x follows a normal distribution with a mean of 10 and standard deviation of 3. a standardized value
a survey of affluent americans those with incomes of 75000 or more indicated that 56 would rather have more time than
In a survey on the quality of customer service at Car Toys, customers were asked to rate the service on a scale from 1 to 10, with 10 being that a customer was completely satisfied.
Suppose a 1/2-pack-or-more-of-cigarettes-a-day smoker has a 200% increased risk of a certain type of serious facial skin condition. How do you interpret this?
suppose that 3 of the 2 million high school students who take the sat each year receive special accommodations because
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