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How to pass a statistic exam. please tell me how to prepare.
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
a system consists of 4 identical components where at least 3 components need to work for the system to work. each
Calculate the average daily inpatient census data for the 20-bed orthopedic unit based on the following information. Plot your results in a bar graph using Excel with month on the x-axis and average daily inpatient census on the y-axis.
Imagine that you have a portfolio of stocks. You want to compare the performance of your stocks to the market as a whole. You learn that the population mean,μ, of stock returns is 7%, and that the population standard deviation, σ, is 2%.
On average, how many samples will be analyzed before detecting a change in the process mean? Assume that the process mean is now at 110 mm (having moved from 105 mm) and that the process standard deviation is 6 mm. Samples of size 4 are selected f..
answer each question with a minimum of 50 words per question1 describe a scenario where you believe a binomial
in a recent study it was reported that 22 of those who had depression went on to develop dementia compared to only 17
Why do you think measurements with a bell-shaped distribution are so common in nature? For example, why do you think women's heights are distributed.
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference among the means?
1 every time you go to a beach for vacation you take home a little sand to keep as a souvenir. over your lifetime you
The life in hours of a battery is known to be approximately normally distributed, with standard deviation s = 1.25 hours. A random sample of 10 batteries has a mean life of x ¯=40.5 hours. Is there evidence to support the claim that battery life ex..
State a type I error and describe why it happens. Describe the factor that researcher can control to change type I error. Also, describe how type I errors can be avoided.
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