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Occasionally, you will hear of a group of people going in together to purchase a large amount of tickets. Suppose a group of 30 purchases 6,000 tickets.
a) How much would each person have to contribute?
b) What is the probability of the group winning? Losing?
How much would it cost to "buy the lottery", that is, buy a ticket to cover every possibility? Is it worth it?
Based on your knowledge of statistics and regression analysis, how would you explain what happened?
Find the value of the linear correlation coefficient? r, and find the? P-value using alpha (a) =0.05
What is the probability that out of the next 200 customers, 60 or fewer will buy milk? (Answer as a percentage with two decimal places and include the % symbol)
Fair die is rolled 10 times. Determine the probability that the odd number (1, 3 or 5) will occur less than 4 times?
What fraction of the time intervals between successive arrivals will be (i) longer than 2 minutes, (ii) shorter than 4 minutes, (iii) between 1 and 3 minutes.
The correlation between number of older siblings and degree of acceptance of personal responsibility for one's own successes and failures is --37.
How many questions must the test contain in order to reduce the standard deviation of Julie's proportion of correct answers to one-fourth its value for an 100-item test?
Organise the data in appropriate class intervals and draw a histogram of the frequency distribution and find the Mean, Median, Range, Standard Deviation and Coefficient of Variation of the yield for the top 40 Australian companies.
Calculate the mean, SS, and standard deviation for the following sample. Be sure to show all formulas with symbols (and plug in numbers), steps
5460 5900 6090 6310 7160 8440 9930. Find the 99% confidence interval for the mean number of home fires started by candles each year.
Test the solubility of benzyl alcohol (also repeat separately with your unknown) and of phenol in 1 M (or 2 M) sodium hydroxide
Do the empirical rules we learned previously seem to be applicable in working with the Poisson distribution where ? = 2? Explain why or why not.
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