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A rock concert producer has scheduled an outdoor concert. The producer estimates the attendance will depend on the weather according to the following table.
(a) What is the expected attendance?
(b) If tickets cost $20 each, the band will cost $300000, pluse $55000 for administration. What is the expected profit?
a student suspected claim the average cost of a sturday night date was no longer 30. to test her hypothesis she
A sample of 120 homes sold recently in a big city gave the mean price of homes equal to $270,000 and the standard deviation equal to $70,000. (a) What is the point estimate of the mean price of all homes in the big city?
a survey of 144 retail stores revealed that the average price of a microwave was 375 with a standard error of 20 if 95
Plot the data on U.S. general aviation shipments (b) Describe the patterns and discuss possible causes.(c) Would a fitted trend be helpful? Explain. (d) Make a similar graph for 1992-2003 only.
Assume the probability that a person has the desease is 0.09 for all people, independently of each other, and compute the expected number of tests necessary for the entire group of 154 people.
the mean of the sampling distribution of means is equal to the mean of the population. t-f and why or why
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
if you sample 100 people and 20 turn out to be over 65 inches tall, you get $20. Which is better: a sample of size 100 or a sample of size 1,000? Choose one and explain. Does the law of averages relate to the answer you give?
Choose a variable and collect data for a least three different groups(samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following:
Assume a population standard deviation of 450-kilowatt hours. Determine the standard error of the mean.
Students from one large high school had a mean score of 58. Is there evidence to suggest that this high school is inferior?
Here are numbers of right identifications by 24 children in Active group: 24 children in Passive group had these counts of correct identifications: Is there good evidence which active learning is superior to passive learning?
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