Use the confidence level and sample data to find the margin of error, E, for the mean. 95% confidence, n = 8, sample mean = 38.0, and s = 9.7 (Assume the data has a normal distribution.)

Solve the problem. Find the critical value that corresponds to a degree of confidence of 91%.

When the probability of one event has no effect on the probability of another event’s occurrence, the two events are said to be:

Find the indicated probability. The following table contains data from a study of two airlines which fly to Small Town, USA. If one of the 87 flights is randomly selected, find the probability that the flight selected arrived on time AND was on the Upstate Airlines.  

Use the margin of error, confidence level, and standard deviation,

Fifty part-time students were asked how many courses they were taking this term.  Answer the questions about the frequency table.   # of Courses Frequency 1 30 2 15 3 5   What percent of students take exactly two courses? [answer7]%   What percent of students take one or two courses? [answer8]%  

Find the indicated probability. Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. A vending machine will only accept coins weighing between 5.48 g and 5.82 g. What percentage of legal quarters will be rejected?

The blood type of a sample of people is as follows: [a] have type A, [b] have type B, [c] have type O and [d] have type AB. If a person from this group is selected at random, what is the probability that this person has type O blood? (Enter a decimal rounded to 3 places as needed)

Use the margin of error, confidence level, and standard deviation,

Find P(3) in a binomial experiment for which n = 5 and p = 1/5.