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Use a significance level of a=0.05 to test the claim that p1=p2. Use the given sample sizes and numbers of successes to find (a) the pooled estimate p, (b) the z statistic, (c) the critical z-values, and (d) the P-Value.
n1=400, n2=800, x1=40, x2=100
barrons conducts an annual review of online brokers including both brokers who can be accessed via a web browser as
Let n be number of documents in (millions) labeled as classified in year that is t years since 2000. Determine the equation of linear model to explain the data.
For the following data set, indicate whether the shape of the distribution is normal, positively skewed, or negatively skewed. Provide evidence for your answer by calculating the mean, mode, and median.
Determine the probability that a randomly selected teacher earns more than $525 per week?
The stem-and-leaf display below gives the test scores for the students in Prof. Jones' economics class. Use the display to answer the following questions.
Sketch the distributions involved, and (c) explain your answers to someone who has never had a course in statistics.
transrail is bidding on a project that it figures will cost 400000 to perform. using a 25 markup it will charge 500000
Determine the first two cumulants also the ratio between the standard deviation and average energy. Explain why distribution becomes extremely narrow.
There is significant evidence, alpha =0.05, to show that there is a difference in the proportions of patients who show improvement between treatments 1 and 2
question the manager of a frozen yogurt store claims that a medium-size serving contains an average of more than 4
a man and a woman make an appointment to meet between 5 p.m and 6 p.m at a certain location and they agree that
what do you conclude about the claim below? do not use formal procedures or exact calculations. use only the rare event
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