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It is currently difficult to hire in the technology sector. Your company believes that the chances of successfully hiring this year are 0.13. Given that your company is successful in hiring, the chances of finishing the project on time are 0.78, but if hiring is not successful, the chances are reduced to 0.53.
a. Draw a probability tree for this situation.
b. Find the probability of finishing the project on time.
Test the hypothesis that the mean price at 7-Eleven is more than the mean price at Vons, at the 0.05 level. Assume that the sampling is random.
six individuals including a and b take seats around a circular table in a completely random fashion. suppose the seats
A positive integer valued random variable N is a stopping time with respect to the discrete time stochastic process {X1, X2, · · · } if for every n, the event {N = n} is determined by the values of {X1, X2, · · · , Xn}.
Choose the Hypothesis. Specify the Decision Rule. Calculate the Test Statistic. Make the Decision. Give an interpretation of the Decision
The class ends the year with a mean of 68 and a stadard deviation of 9, the prof decides to bell curve the marks so that the top 10% gets an A (80%). What z score must a student achieve to recieve an A? What raw grade does this correspond to?
In general, how does increasing the sample size affect the standard deviation of the sampling distribution of possible sample means?
The article "Can We Really Walk Straight?" (American Journal of Physical Anthropology [1992]: 19-27) reported on an experiment in which each of 20 healthy men was asked to walk as straight as possible to a target 60 m away at normal speed. Constru..
someone working for a survey organization approached the rst 100 students they saw on campus and noted that 52 of these
what is the percentage of the total area under the normal curve within plus and minus 2.1 standard deviations of the
A random sample of 64 observations produced a sample mean of 98. Using a = .01, would you reject the null hypothesis?
No children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude?
a consumer group decides to test the effectiveness of a new organic laundry detergent. they intentionally get grass
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