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Let X be the random variable for the number of times a fair dice is tossed before a six appears. Find E[X]. I tried by making X a geometric distribution and got E[X]=6. However the answer that is given says its 5. Can some one help me out with this?
Calculate table T t . Calculate Computed T c .
the route used by a certain motorist in commuting to work contains two intersections with traffic signals. the
She believes that the number of customers served on weekdays follows a normal distribution. Construct an 99% confidence interval of the average number of customers served on weekdays.
compare the means of the following sets of yield data from catalysts aampb. determine if we can state the mean yield of
Several questions will be asked but the main outcome measure of interest will be the percentage of customers who were completely satisfied and plan to return and the average amount spent.
for a certain type of electronic component the lifetime x in thousands of hours has an exponential distribution with
What is the difference between statistical significance and practical significance? Can a hypothesis test result be statistically significant and yet practically useless.
A small pilot study is being conducted to determine the association between maternal age and birth weight. First, from all the single births in 2009 at Hospital X with mothers aged ? 20 years, we randomly selected 15 records.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter.
Is there a meaningful relationship between grades and SAT scores? If a student scores a 450 on the SAT what will her GPA be?
A sample of 420 families revealed the following. At the 0.05 significance level, is there a difference in the proportion of customers that prefer each day of the week?
What are some examples of each of the trend types (Secular/Linear)? What external factors might affect each of the different types of trending?
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