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1. In a second grade class containing 13 girls and 7 boys, 2 students are selected at random to give out the math papers. What is the probability that both are girls?
2. If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
Any value which is based on having measured a sample is called:
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
At.01 significance level, is there relationship between job pressure and age?
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
If is the proportion of the next 100 shoppers that buy a packet of the crackers after tasting a free sample, then the probability that fewer than 30% buy a packet after tasting a free sample is approximately.
Among 500 freshmen pursuing a business degree at a university, 347 are enrolled in an economics course, 204 are enrolled in a mathematics course, and 160 are enrolled in both an economics and a mathematics course.
Find the probability of getting a head and rolling a six
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
Developing the histogram and pie chart for the sample data.
Make a stem plot for the men height data. Calculate the five-number summary for the women.
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
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