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You are estimating the cost of engine overhauls a sample of 99 repairs showed an average overhaul of 285 hours with a standard deviation of 60 hours. Calculate a 95% confidence interval for the average overhaul.
A federal bank examiner is interest in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. Calculate a 90% confidence interval for the mean balance of defaulted loans over the past three years.
What score would Sandra need to beat 91 percent of her mathematics class? The mean score was 73, and the standard deviation was 12.
The bombers success rates for bomber A, B and C are: 30%, 45% and 60% respectively. Find the probability that:Bomber A will succeed, but bomber B and C will fail.
an ap statisctics group asked an srs of 20 boys at their school how many shoes they have. a 95 confidence interval for
Welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
Conduct test to find out if average sales invoice this month differs from the historical data. Level of significance a = .05
Make a graph to display the distribution of doctors per 100,000 people.Write a brief description of the distribution.Are there any outliers?If so, can you explain them.
Let's treat race of offenders as the independent variable and race of victims as the dependent variable. If we first ignore the independent variable and try to predict race of victim, how many errors will we make?
consider two independent random variables xsub1 and xsub2 having same cauchy distributionfx1pi1x2 from negative
The questions below should be answered completely and carefully. Refer to the 'Escape Fire Bb Upload' document for statistics and other information which may help you to formulate your answers.
Standard deviation of sample was $3.53. Determine point estimate of population mean. Determine the 95% confidence interval of population mean. Suppose the variable is normally distributed.
an average american family spends 927 dollars on christmas gifts with standard deviation of 200.what is the probability
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