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A coin is tossed three times.
1. What is the probability that the coin will land heads at least twice?
2. What is the probability that the coin will land heads on the second toss, given that heads were thrown on the first toss?
3. What is the probability that the coin will land tails on the third toss, given that heads were thrown on the first toss?
"If you took 40 employees at random from the corporation, there is a pretty good chance the average number of days absent would be 12 or more. That's what happened to us - chance variation." Is this a good defense? Justify your answer.
let x1...x25 be a random sample from a normal distribution with mean mu and variance 100. the null hypothesis h0 mu50
Chance that David would default on his loan based on your knowledge about David. At a cost of about $1000, the bank can investigate and figure out David's complete credit history.
What are some of the words that form clues? How does one know what is a population parameter and a test statistic?
Construct a 94% confidence interval for the true percentage of smokers among all people who completed four years of college.
1- as the confidence level increases while me stays the same does the required sample size increase decrease or stays
What proportion of the first 70 digits in the table are 0s (there are 40 digits in line 101 followed by the first 30 in line 102)?
a resercher wishes to estimate with 90 confidence the proportion of adults who have high-speed internet access. her
What are the expexted value and standard deviation, respectively, of the number of successful first serves? What is the probability she makes 90 or more successful first serves?
when a newspaper article reports the results of a study and draws a conclusion without stating if the results are
What are the degrees of freedom of the t test statistic when testing whether the number of customers who make purchases affects weekly sales and what is the value of the standard error of the estimate?
an electronics company wants to compare the quality of their cell phones to the cell phones from three competitors.
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