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Suppose that y is a random variable having a normal distribution with a mean equal to 250 and standard deviation equal to 10.
a) Show that the event y< 260 has the same probability as z<1
b) Convert the event y> 230 to the z score equivalent
c) Find P(y<260) and P(y> 230)
d) Find P(y>265), P(y<242) and P(242<y<265)
Exponential distribution with a mean of 4 minutes. What is the probability that a person is served in less than 3 minutes on at least 4 of the next 6 days.
the question states an a.c. voltage v comprises of a fundamental voltage of 100 v rms at a frequency of 120hz a 3rd
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in random sampling each item or element of the population has an equal chance of being chosen at each draw. a sample is
a. Generate a scatter diagram that includes the best-fit linear equation for these data. b. Does there appear to be any relationship between the variables? If so, is the relationship direct or inverse? c. Interpret the slope of the equation generated..
ACT scores of high school seniors. The scores of high school seniors on the ACT college entrance examination in 2003 had mean JL = 20.80 and standard deviation (J = 4.80. The distribution of scores is only roughly Normal.
At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
The results for college x was a mean of 5 hours and an estimated population variance of 2 hours: for college y, m= 4, s 2 =1.5; and for college Z, M= 6, s 2 =2.5 what should you conclude? Use the .5 level.
This confidence interval can't be trusted to give information about the spending plans of all adults. Why not?
Can the human resource manager conclude, at the 5% significance level, that the job enrichment workshops increase sales consultants' job satisfaction levels? Present your findings to the human resource manager.
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