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To help assess student learning in her developmental math courses, a mathematics professor at a community college implemented pre- and posttests for her students. A knowledge-gained score was obtained by taking the difference of the two test scores.
The direction of the pigeons" loft is 149 degrees from their release point. Do the pigeons, on average, fly directly to the loft?
if i go into a pizza house and i have the choice of having one of 3 different types of dough with one of 7 different
In a study relating the amounts of time required for room service delivery at a newly opened Radisson Hotel, 20 deliveries had a mean time of 24.2 min and a standard deviation of 8.7 min. The sample data appears to have a bell-shaped distribution...
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
Create a hypothesis test which will investigate the variances. Label all steps for your test and show and label each step of the test procedure at a .1 level of significance.
Mutual funds are classified as large-cap funds, medium cap funds, or small-cap funds, depending ont eh capitalizaiton of the companies in the fund.
Biologist estimates that 50% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Use the following graph of a function f to determine x or y to the nearest integer as indicated. Some problems may have more than one answer.
consider 16 gallons of genetically modied tomatoes. suppose that 75 of those tomatoes have an increased resistance to
Department decided to conduct the test at the 0.05 level of significance whether the modification actually increased the life of the AAA battery. What was their decision rule?
in the past year 17 of local businesses have eliminated jobs. if 25 businesses are randomly selected what is the
You then sort by random numbers in ascending order. Finally, you take the first 50 sorted employees as your sample. Does this approach constitute a statistical or a nonstatistical sample?
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