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The round table of astrologists consists of 144 people. As they examine the laws of the stars, they find that it brings good luck to a Capricorn if a Scorpio sits on his/her right. Calculate the expectation and variance of the number X of lucky Capricorns.
Hint: Write X as the sum of indicators.
According to the data from the College Entrance Examination Board, scores on the SAT-I test have a mean of 1017, and Q1 is 880.
Provide an example from your work or home life; illustrate the difference between the application of descriptive statistics and inferential statistics.
Although Bob raised the price to $1.75, sales of quarter-pound burgers rose to 8,200. Explain why this does not represent a violation of the law of demand.
The U.S. Department of Transportation defines an airline flight as being "on-time" if it landed less than 15 minutes after the scheduled time shown in the carrier's Computerized Reservation System.
Q. An owner of a chain of stores would like to predict weekly sales based on the number of customers who made a purchase. A random sample of 10 stores were selected. The weekly sales are in thousands of dollars.
the equation for a regression line predicting the number of hours of tv watched by children y from the number of hours
company a makes a large shipment to company b. company b can reject the shipment if they can conclude that the
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
Find the probability that a given mouse will live. a. more than 32 months b. less than 28 months c. between 37 and 49 months.
you are told that the population of the scores of iq test takers is normally distributed has a population mean of 100
Certain tubes manufactured by a company have a mean life of 800 hours and standard deviation of 60 hours. Find the probability that a random sample of 16 tubes taken from the group will have a mean life of?
An EMT Service keeps records of emergency calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls as follows.
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