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Question: Consider the following Table:
Y 0 1 2 3
P(Y) 0.10 0.30 0.40
(a) Complete the Table with the probability of P(X = 3).
(b) Calculate the mean, variance and standard deviation of Y.
(c) Suppose now we have a new random variable X = 2 + 3Y. Construct a 'Bible with the probability distribution of X for each value of Y and X.
(d) Calculate the mean, variance and standard deviation of X.
(e) Use the properties of the expected value and variance to obtain the expected value of X, E(X), and the variance of X, V(X). Compare your answers.
Standard deviation of sample was $3.53. Determine point estimate of population mean. Determine the 95% confidence interval of population mean. Suppose the variable is normally distributed.
a. Determine the sample proportion, p, of households with cellular telephones that can be used to access the Internet. b. If the population proportion is 0.40, determine the standard error of the proportion.
A professor needs to select a volunteer for a project .which of the following would not be an example of a simple random sample ?A)he chooses a number between 00 and 99.
What is the hourly rate for cars entering the tunnel? Given rate is per minute therefore to get the hourly rate we need to x 60. Hourly rate -= 0.5 x 60 = 30 cars/hour.
Use Wilcoxon rank-sum test to test at the .10 level of significance to test the claim that the difference in dosage have significant effect on the length of time it takes guinea pigs to fall asleep.
A cable manufacturer has historically averaged 2.6 flaws per 1000 meters length of wire production.
The marks on a statistics midterm test are normally distributed with a mean of 78 and a standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is more than 75?
Also suppose that the probability that the current player does not reach the semifanals of the tournament is 0.58 and that there is a 0.71 probability that jill is ranked next weekon the WTA circuit. What is the probability that the current player..
What proportion of 330 cci cars fall between 26 to 30 miles per gallon range? Compute the percentage of each of the car models that get 30 or more mpg.
When calculating correlation coefficient, what does a value of -2 indicate? Strong negative correlation, Weak negative correlation.
In a sample of 49 adolescents who served as the subjects in an immunologic study, one variable of interest was the diameter of skin test reaction to an antigen.
The users are then timed in their ability to setup and program the DVD by performing a series of operations. Which statistical analysis technique should be used? What is the null hypothesis? Can the market researcher get an answer? Why or why not?
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