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Business and Management Two packages are independently shipped from Fort Collins, Colorado, to the Convention Center in Kansas City, Missouri, and each is guaranteed to arrive within four days. The probability that a package arrives within one day is 0.10, within two days is 0.15, within three days is 0.25, and on the fourth day is 0.50.
Let the random variable X be the total number of days for both packages to arrive. Construct the probability distribution for X.
She randomly surveys 426 schoolmates and finds that 150 report they fear public speaking. Conduct a hypothesis test at the 5% level of significance to determine if the percent at her school is less than 40%
Results from a January 2008 telephone survey conducted by Gallup showed that 57% of urban Colombian adults support a free trade agreement (FTA) with the United States. Gallup used a sample of 1000 urban Colombians aged 15 and older.
Using this percentage and random digits, make a frequency table of the longest run of heads in a sequence of 200 attempts. After following the player for 200 field goal attempts, do you see any evidence of an unusually long streak?
If a population has a mean of 80 and standard deviation of 20, for the distribution of sample means based on n = 16, what is the expected value (of the mean) and the standard error?
A portion of a study by Wechsler (1958) reports that for 100 males taking the Wechsler Adult Intelligent Scale (WAIS), the sample mean and variance on picture completion are X = 9.79 and s = 2.72. Test the hypothesis H0: µ ≥ 10.5 with α = 0.025.
lay out the design for two between-subjects experiments a an experiment involving an experimental group and a control
It is better to use the median rather than the mean for a distribution when:
Find an expression for the mth moment of an Erlang random variable whose PDF is given by function. -and positive n constant b.
In the sample of 80 students, 9 were found to be overweight. At a= 0.01, is there adequate evidence to reject claim using critical values?
If 134 out of a random sample of 235 college students expressed an intent to vote, can we reject the aide's estimate at the 0.05 level of significance? Perform a one-tailed test.
words are displayed on a computer screen with background colors of red and blue. results from scores on a test of word
The U.S. Fish and Wildlife Service's report on the bass population in the North American lakes indicated average weight of the fish to be 3.0 lb.
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