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The final score of games of a certain spot were compared against the final point spreads established by oddsmakers. The difference between the game outcome and point spread (called a point spread error) was calculated for 210games. The sample mean and standard deviation of the point spread errors are x=1.8 and s=14.8. Use the information to test the hypothesis that the true mean point-spread error for all games is larger than 0. conduct the test a=0.10 and interpert the result.
A. Find the test statistic
b. Determine rejection reason
c. What is appropriate conclusion at a=0.10
suppose that in bags of christmas mampms half of the mampms are supposed to be red and the other half green. in a bag
A representative of the environmental protection agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples.How many different samples are possible?
The average daily jail population in the United States is 706,242. If the distribution is normal and the standard deviation is 52,145, find the probability that on a randomly selected day the jail population is:
Use rejection points and previously given sample information to test the hypothesis you set up in part a by setting alpha equal to 010, .05, .01, and .001.
rc-cars purchases batteries which they include with their remote control cars for sale to the consumer. bill the owner
Metal detectors at airports are used to determine whether passengers are carrying weapons. If the null hypothesis states that a passenger isn't carrying a weapon, a type I error would occur whenever
Research question: Are mean crash damages same for these 3 vehicles? Crash1 Crash Damage ($).
an amusement park studied methods for decreasing the waiting time minutes for rides by loading and unloading riders
a sample of 25 pieces of laminate used in the manufacture of circuit boards was selected and the amount of warpage in.
The same survey was mailed to 500 adults aged 25–34 without the gift certificate. There were 65 responses from the first group and 45 from the second group. (a) Perform a two-tailed test comparing the response rates (proportions) at α = .05
a university planner is interested in determining the percentage of spring semester students who will attend summer
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
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