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To help fill its seats for a particular flight, an airline offers a special nonrefundable fare of $200 for customers who make a reservation at least 21 days in advance and satisfy other restrictions. Thereafter, the fare will be $600. A total of 100 reservations will be accepted. The number of customers who have requested a reservation at full fare for this flight in the past always has a normal distribution with mean 40 and standard deviation 10. Determine how many seats should be reserved for customers who pay full fare.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds tha..
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Please give an example on higher wages vs. education level using a sample population of 30 men and women. Compute the measures of central tendency, dispersion, and skew for your data
A check of dorm rooms on a large college campuses revealed that 38% had refrigerators, 52 percent had TVs and 21 percent had both a TV and a refrigerator. What's the probability that a randomly selected dorm room has.
Single group post-test and internal validity threats - Answer the question either by writing the design name or by describing the design using standard notation
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Construct a stem-and-leaf diagram for the data:
To determine whether two categorical variables are independent, one should use the:
What is the probability that the first and the last ones on the EP are the relationship songs?
The following table describes the asset allocation of your portfolio with the corresponding return in percentage, X, and the proportion of that specific asset in the portfolio, P(X).
Is it reasonable to conclude that this set of n = 16 people is not a representative random sample of registered voters?
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
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