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You win a game if you roll a die and get a 2 or a 5. You play this game 60 times.
a) What is the probability that you win between 5 and 10 times (inclusive)?
b) What is the probability you will win the game at least 15 times?
c) Probability you will win 40 times?
d) What is the most likely number of wins?
e) What is the probability of obtaining the number of wins in d?
Calculating the mean, do you expect it to be greater than the median or less than the median. Why?
What step-by-step methods might make this material easier to learn and internalize? Are the formulas really as terrifying as they might first appear?
How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence?
Two t-curves have degrees of freedom 12 and 20, respectively. Which one more closely resembles the standard normal curve? Explain your answer.
If two American adults are randomly selected, what is the probability that neither of them has ever experienced a migraine headache?
Does Lavastatin reduce the risk of heart attack? In a Texas Study, researchers gave Lovastatin to 2,325 people, and a inactive substitute to 2,081 people, with an average age of 58. After 5 years, 57 of the lovastatin group suffered a heart attack..
A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.
Using the 0.05 level of significance, is there evidence that the population mean is above $300? What is your answer in (a) if s = $90 and the 0.10 level of significance is used?
A doctor knows from experience that 20% of the patients to whom he gives a high blood pressure drug will have undesirable side effects. Assume the doctor gives that drug to ten of his patients
According to a national survey of 1,500 Silverman Sachs customers, 1,050 of them were either satisfied or very satisfied with their financial advisor.
Choose at random 4 of those under 21 to interview about attitudes toward alcohol. You have given every student the same chance to be interviewed. What is that chance?
Perform exploratory data analysis on all variables in the data set. Realizing that you have six groups, be sure that your exploratory analysis is broken down by group. When possible, include appropriate graphs to help illustrate the dataset.
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