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A researcher reports the following equation for a best-fitting straight line to a set of data points: Yˆ=?1.01X+3.24. Which value is the y-intercept? Explain your answer.
Yˆ
X
-1.01
3.24
Which has mean of 88 and standard deviations 16. Find the probability that the difference between the sample mean. a)is more than 8. b)is less than by 18.
Suppose a certain brand of Westinghouse light bulbs has a population life expectancy of 3000 and a population standard deviation equal to 100. (Assume the distribution of the population is normal). What is the probability that a sample of 30 light..
Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.
An insurance agent has appointments with four prospective clients tomorrow. From past experience the agent knows that the probability of making a sale on any appointment is 1 out of 5.
The random variable x, which is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number..
hurricane katrina forced insurance companies to examine policy rates and originally determined that the average claim
during the dry month of august one u.s. city has measurable rain on average only two days per month. if the arrival of
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
assume that the number of customers who arrive at a water ice stand follows the poisson distribution with an average
Assume the arrival of these emails is approximated by the Poisson distribution.
Second treatment had M = 52 with s^2 = 36. Do these data point to significant difference between two treatments? Use the two-tailed test with α = .05.
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