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The new Lucky Lady Casino wants to increase revenue by providing buses that can transport gamblers from other cities. Research shows that these gamblers tend to be older, they tend to play slot machines only, and they have losses with a mean of $182 and a standard deviation of $105. The buses carry 35 gamblers per trip. The casino gives each bus passenger $50 worth of vouchers that can be converted to cash, so the casino needs to recover that cost in order to make a profit. Find the probability that if a bus is filled with 35 passengers, the mean amount lost by a passenger will exceed $50. Based on the result, does the casino gamble when it provides such buses?
Test for single Proportion - Are the data consistent with the model? Answer yes or no, and explain briefly.
What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
Find a 99% confidence interval for the population mean number of weekly miles.
Conduct a one-tailed hypothesis test for the mean at the .025 significance level. State the null and alternative. State the critical value. Draw a diagram. Provide the computation of the test statistics. State your decision in terms of the null hy..
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
A device has a sensor connected to an alarming system. The sensor triggers with probability 0.95 if dangerous conditions exist in a given day and with probability 0.005 if conditions are normal during the day. Days with dangerous conditions occur ..
A researcher is interested in whether social assertiveness might be influenced by training procedures. Two groups of college sophomores are randomly selected. Group A subjects are assigned to the "training sessions" and Group B subjects do not rec..
Compute β-error of test in part (a) if true difference in mean burning rate is 2.5 centimeters per second.
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Determine the 90% confidence interval for average days worked by employees in all payroll departments?
The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis?
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
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