17 Oct correct interpretation
1) A hydrologist creates a model to predict the volume flow for a stream at a bridge crossing with a predictor variable of daily rainfall in inches.
Volumeflow = 1.6 + 29 rainfall
According to his model, what is the volume flow if the daily rainfall in inches? round your answer to 1 decimal place.
2) The following linear regression model can be used to predict ticket sales at a popular water park.
Ticket sales per hour =-631.25+11.25(current temperature F)
Which of the following is the correct interpretation of the slope?
A) A one degree increase in temperature is associated with an average increase in ticket sales of 11.25 tickets.
B) A one degree increase in temperature is associated with an average decrease in ticket sale of 11.25 ticket.
C) The slope tells us that high temperature is causing more people to buy ticket to the water park.
D) None of these
3) In the game of chess there are 32 pieces: 2 kings, 2 queens, 4rooks, 4bishope, 4 knights, and 16 pawns. If we randomly select a piece what is the probability that is not knight? Leave your answer between 0 and 1 round your answer to 2 decimal place.
4) A recent poll of 300 executives exercise habits revealed that 95 run and 127bike. 49 reported that they bike and run for exercise. If one of these executive is randomly selected, what is the probability that they run and bike for exercise? leave your answer as a number between 0 and 1. Round to two decimal places.
5) In a shipment of 15 room air conditioners, there are 5 defective thermostats. Two air conditioners will be randomly selected (without replacement) and inspected. what is the probability that the selected two are both defective? Round your answer to four decimal places.
6)A research group has reported that the number of text message that a person send tends to decrease with age. The table below contain a random sample of 15 people, along with their ages and the number of text they sent on the previous day.
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