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An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. At the end of the semester, she has the following grades.
A B C D F
6 14 22 8 4
Find the critical value. Use alpha= 0.05
A) 9.236
B) 7.779
C) 11.070
D) 9.488
From the given research, compare the major players better at batting than 20 years ago using five step hypothesis.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
Find the probability using the Poisson distribution.
The closing price of a company's stock tomorrow can be lower, higher or the same as today's closed. Without any prior information that may affect the price of the stock tomorrow, the probability that it will close higher than today's close is 1/3
At 0.05 level of significance, is there evidence that proportion of claims processed under this new system is higher than article reported for previous system?
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Determine the value of population mean? What is the best evaluate of this value?
would this prove that they are exceeding their goal, using α = .025?
The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
Tom works the night shift at a gas station on the edge of Champaign. One night he mixed 3 stale doughnuts in with 13 fresh doughnuts. That night 6 customers bought one doughnut each, selecting them at random. What is the probability that at least ..
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
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