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The probability Mary will receive an A in a class is 0.70. Assuming independence, if she is taking 5 classes this semester, calculate the probability she will receive exactly 3 A's.
Does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in British versus American trade magazines? Please show work.
if i have been approved for a $70,000 loan toward the purchase of a new home at 12% interest. The mortgage is for 30 years. How much are the approximately annual payments of the loan? Hint: Assume you pay yearly.
A component has an exponential time-to-failure distribution with a mean of 10,000 hours. The component has already been in operation for its mean life. What's the probability that it will fail by 15,000 hours?
A population whose shape is unknown has a median of 75. You selected a sample of 40. The standard deviation of the median is 5. Calculate the probability that the median of the sample or average medians is:
Find a 95% confidence interval for the true proportion of voters who approve of the way the government is being run.
If the pilot plant fails, Rob feels the chance of the full-scale facility succeeding is only 20%. The probability that the pilot plant will succeed is estimated at 0.6. Structure this problem with a decision tree and advise Rob what to do.
Describe each of the following methods of statistical inference in detail (Please try to use layman's terms).
A research company stated that 20% of missed school days are due to asthma. If a group of 400 school children are selected at random, what is the probability that fewer than 70 will miss school because of asthma?
The data below shows the time to process an inpatient admission, before and after a system usage training session was given. The following hypotheses were formulated for this study.
Use confidence intervals to determine whether or not (a) we can be 95% certain that the average woman considers herself overweight as compared to her ideal weight.
Which ones are testable and which ones are not testable? Select one claim and develop the null and alternate hypotheses and suggest a possible method of testing the hypothesis and measuring your concept.
A national survey is conducted to assess the association between hypertension and stroke in persons over 55 years of age. Compute the incidence of stroke in persons over 55 years of age
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