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Normal approximation to the Binomial distribution.
At a certain community college, 60% of the students are female. If 300 students are randomly selected to be included in a survey, find the probability that at least 195 of the students are female.
Find the test statistic value for testing the equality of population means of the two samples.
A teacher divides her class into two groups. One group is taught a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see that group has better grades.
A human factors psychologist studied three computer keyboard designs.
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).
It has been estimated that 30% of all farms are family-owned. In a sample of 12 farms, what is the probability that exactly three farms are family owned?
Analysis of variance- One way classification - Are there differences among these 3 drugs with respect to how long they are retained in the body?
Find the probability of winning jackpot?
Is it reasonable typical worker does not miss any days during a pay period?
Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9.
Should Martha use an independent-samples t-test or a related samples t-test? Explain your answer.
Make a point estimate and a 95% confidence interval estimate.
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
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