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1) A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
Following are the American College Test (ACT) scores attained by the 25 members of a local high school graduating class:
21
24
23
17
31
19
20
25
16
28
14
18
Find P99, P90, and P80 for the ACT scores. [Hint: Use nk/100 to find the location in the ordered data for each percentile.] All work must be show in order to get your assignment graded
2) How is a "discrete" variable different from a "continuous" variable? Please give one example of each, and describe how these examples differ from one another.
Identify what makes flipping a coin and keeping track of tails a binomial experiment .
3)If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not?Then find the z-score for the standard normal distribution where:
Area=0.32 in the left tail.
question the police chief in montgomery wants to know if the citys population feels that the police are doing a good
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
What size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 3 percent?
What results in your departments seem to be correlated or related to other activities? How could you verify this? Create a null and alternate hypothesis for one of these issues. What are the managerial implications of a correlation between these v..
a survey of 25 randomly selected iphone owners showed that the purchase price has mean of 440 with a sample standard
Use either Linear Programming module or Transportation module of Cd to minimize the shipping costs involved in move.
1. suppose you interview 10 randomly selected workers and ask how many miles they commute to work. youll compute the
a random sample of 300 citibank visa cardholders accounts indicated. a sample mean debt of 1220 with a sample standard
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? What is the probability that a randomly chosen stock investor also invests in fixed income instruments?
using one mean t test to determine whether or not to support the claim.the t-test ia another hypothesis test that works
The English Department wants to know whether there is a difference in the proportions of female students taking Eng 110 and Eng 100 courses. Samples are collected from each class: Eng 110 sample found 16 out of 29 students in class and Eng 100 ..
urn 1 has 5 red and 7 blue balls and urn 2 has 6 red and12 blue balls. pick 3 uniformly and randomly from each of the 2
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