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There is a story about Charles Dickens (1812-1870), the English novelist and one of the most popular writers in the history of literature. It is known that Dickens was interested in practical applications of mathematics. On the final day in March during a year in the second half of the 19th century, he was scheduled to leave London by train and travel about an hour to visit a very good friend. However, Mr. Dickens was aware of the fact that in England there were, on the average, two serious train accidents each month. Knowing that there had been online serious accident so far during the month of March, Dickens thought that the probability of a serious train accident on the last day of March would be very high. Thus, he called his friend and postponed his visit until the next day. He boarded the train on April 1st, feeling much safer and believing that he had used his knowledge of mathematics correctly by leaving the next day. He did arrive safely! Is there a fallacy in Dickens; argument? Explain.
Using a p level of 0.05 and a two-tailed test, what is the critical value?- If T = 10, would the researcher reject or fail to reject the null hypothesis? Explain.
Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion of women over 55 who are widows?
Find the expected value and standard deviation of your prospective winnings.- You play twice. Find the mean and standard deviation of your total winnings.
An experiment on elephants in captivity was done to find out whether breeding would occur more often when the elephants were kept together in a herd.
Determine the POS system that you would choose, and provide your rationale for choosing that particular system.
Following are the numbers of daily bids received by the government of a developing country from firms interested in winning a contract for the construction.
Suppose the systolic blood pressure Xand fasting blood sugar Y are jointly distributed as bivariate normal in some population with means 120 and 105, standard deviations 10 and 20, and correlation 0.7. Find the average fasting blood sugar of those..
the mean iq score of adults is 100 with a standard deviation of 15. use the empirical rule to find the percentage of
find the mean and standard deviation for the normal distribution where 50 of the data falls between 73.25 and 86.75.
1 assume that adults have iq scores that are normally distributed with a mean of 105 and a standard deviation of 15.
Identify the type of the two key independent variables in the study, level of bullying and perceived organizational support.
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