Multiple choice test
A multiple choice test consists of 5 questions each with 4 possible answers. What is the probability that a student will
A) Guess them all wrong
B) Guess at least 4 correct
C) Guess less than 3 correct
Expected delivery within 24 Hours
A national manufacturer of unattached garages discovered that the distribution of the lengths of time it takes two construction workers to erect the Red Barn model is normally distributed with a mean of 36 hours and a standard deviation of 5 hours
The mean of a normal distribution is 406 pounds. The standard deviation is 10 pounds. What is the area between 422 pounds and the mean of 406 pounds?
Compute the population standard deviation for this random variable and use your answer from the previous question in order to complete the following observation: Out of a population of 10000 customers, on average _____ customers make additional pu
Suppose you know that the distribution of sample proportions of the residents of one town over 70 years old in samples of 110 residents is normal with a mean of 0.12 and a standard deviation of 0.03.
IS there evidence to suggest the proportion of males who feel air travel is now safer is greater than the proportion of females? Complete your analysis based on odds ratios.
In 1998 20% of university undergraduate students had at least one tattoo. A health practitioner obtains a random sample of 1029 university undergraduates and finds that 230 have at least one tattoo. Has the proportion of university undergraduate
Subjects are randomly and independently assigned to two groups where one is giving the leading product and the other given a new drug about to be released. Subjects then record the time it takes to realize relief from pain. Is there evidence to su
Determine the sample size that would be required to estimate the true proportion of defective chips if we wanted our estimate, p^, to be within 1.25% of the true proportion, with 99% confidence.
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