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The average age of vehicles registered in the United States is 96 months. Assume the population is NORMALLY DISTRIBUTED with a standard deviation of 15 months. Find the probability that the mean age of a sample of 36 vehicles is between 98 and 100 months
Choose one time-series describing Spirit Airlines and make a line chart. (b) Describe the trend (if any) and discuss possible causes.
Waiting time at a bank drive-in widow the average waiting time at a drive-in window of local bank is 10.3 minutes,
Discuss the underlying causes that might explain the trend. (c) Use Excel, MegaStat, or MINITAB to fit three trends (linear, quadratic, and exponential) to the time series.
a random variable x follows a normal distribution with a mean of 10 and standard deviation of 3. a standardized value
The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes
Construct and interpret the 90% Confidence Interval for the mean starting salary of college graduates in developmental psychology. Salaries are in thousands.
The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model.
here is data withnbspynbspas the response variable. xy
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
USA today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip? What kind of sampling method is this?
Household expenditure for long distance telephone service in City A and average monthly expenditure in City B extends from X to Y, determine the value of X?
A state-wide sample survey is to be made. First, the state is subdivided into counties. Seven counties are selected at random and further sampling is concentrated on these seven counties.
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