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An airport ventilation system takes 2.5 m^3/s air at 100 kpa, 17 C into a furnace, heats it to 52C, and delivers the flow to a duct with cross-sectional area 0.4 m^2 at 110 KPa. Find the mass flow rate and the velocity in the duct.
a scientist attempts to perform a difficult experiment. she is successful in about 80 of her attempts. she attempts the
The weights of adult males is normally distributed with a mean of 200 pounds and a standard deviation of 40 pounds. Calculate the probability that an adult male weighs less than 130 pounds.
Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92. Assume that the following questions about the cost of a hospital emergency room visit for this medical service.
Explain the difference between a logarithm of a product and the product of logarithms and give examples of each.
You randomly select 425 students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
The average age of the women was 45.582 with a standard deviation of 5.143. He uses this information to calculate a 95% confidence interval for the differnce in means, (-11.41, -5.422). The best interpretation of this interval is which of the foll..
The residents play both shuffleboard and poker, find the probability that a resident plays poker, given that they garden (that is, find P(poker | garden).
Sstandard deviation was found to be 3.3 minutes. Is there evidence to reject the manager's claim at alpha =.02? Perform an appropriate hypothesis test.
The team wins 55% of their night games, and 85% of their day games. According to today's newspaper, they won yesterday. What is the probability the game was played at night?
Explain the general process and the steps included in conducting a hypothesis test? What is the difference between parametric and nonparametric hypothesis testing?
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
Would you classify these data as time series or cross-sectional and which of the variables are quantitative and which are qualitative?
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