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A client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual Nissan Sentra owners purchased at the gas pump last month. Your client wants to know if the data set represents a normal distribution. Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
A researcher is looking at the relationship between home-schooling and achievement. She is hypothesizing that the home-schooled children will score higher than non home-schooled children on a standardized achievement test.
the population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a
If we repeated this procedure many, many times, only 5 percent of the 95 percent confidence intervals would fail to include the mean Math SAT score of the population of all students at this college.
An airline estimates that 98% of people booked on their flights actually show up. If the airline books 76 people on a flight for which the maximum number is 74
File a claim is 0.0005. Suppose they wrote 400 policies for the coming weekend, what is the probability that exactly two claims will be filed?
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process.
Assume that Los Arboles had a special program in place to encourage helmet use. Elucidate to what extent did removal of the outlier improve the fit.
Solve by completing the square: Solve using the square root property:
What are the differences between a two sample t-test and ANOVA hypothesis testing? What is an example of a research idea that would need to be analyzed using an ANOVA?
The researcher wants to determine whether there is a relation between the type of residence owned and the level of the family income. He randomly sampled 100 homeowners and obtained the following data:
It is known that 20% of the children in a school are first graders. If the school is sending a group of 11 randomly selected children to camp, what is the probability that less than 4 of the campers are first graders in this binomial distribution?
If I had 6600 wigets, how many do I have to test with 0 failures to show 95% of them are acceptable with a 95% confidence?
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