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1. Suppose we randomly select two students from a mathematics class and asked whether the student selected each time is a member of a math-club or not. Write all the outcomes for this experiment. Draw the Venn and Tree diagrams for this experiment.
2. In your class, some students may be in favor of a closed-book exam and others may be in favor of an open-book exam. Suppose you select two students randomly from this class and asked whether they are for closed-book or for open-book exams. How many distinct outcomes are possible? Draw the Venn and Tree diagrams for this experiment.
Assume that you choose a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
What is the idea of "least squares"? What is the connection between "least squares" and linear regression?
An element E has a constant failure rate (lamda) and a reliability at time t of R(t)=p, if p=0.2 and 0.8, What is the effect on Rs(t), and basic reliability, serial MTBF, of adding additional elements to the series baseline system containing a sin..
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
Illustrate is the range of values for a coefficient of correlation. Illustrate degree of relationship do values of the correlation coefficient (r)with magnitudes close to 1.00 indicate.
Which conditional distributions do these statistics refer to, those of y at given catagories of x, or those of x at given categories of y? Set up a table with race of murderers as rows and race of victims as columns, showing the two conditional di..
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
Determine pearsons correlation coefficient and comment on the value obtained. Obtain a regression equation representing the above data. Estimate the production batch size for a direct labour cost of R350-00.
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