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An increase in the rate of consumer savings frequently is tied to a lack of confidence in the economy and is said to be an indicator of a recessional tendency in the economy. A random sampling of n = 200 savings accounts in a local community showed the mean increase in savings account values to be 7.2% over the past 12 months, with standard deviation 5.6%. Estimate the mean percentage increase in savings account values over the past 12 months for depositors in the community. Place a bound on your error of estimation.
When solving a quadratic equation using the quadratic formula, it is possible for the b2 - 4ac term inside the square root (the discriminant) to be negative, thus forcing us to take the square root of a negative number.
a selfless person approaches jones and smith with a 100 bill and offers to sell it to the highest bidder but both the
The owner of the Burger Doodle Resturant is considering two ways to expand operation: open a drive-up window or serve breakfast. Th increase in profits reulting from theise proposed expansions depend on weather a competitor opens franchise down th..
find the moment generating function for y2 where y is an independent standard normal random
find the variance and standard deviation of this data set 20 29 25 25 22 11 16 24 show
the frequency distribution below shows the distribution for checkout time in minutes in umuc minimart between 300 and
a random sample of 30 students results in a sample mean age of 20 years with a sample standard deviation of 1.5 years.
With the exponential function e^x and logarithmic function log x how do I graphically show the effect if x is doubled?
Using a single-server queuing system with Poisson arrivals of 10 units per hour and a constant service time of 2 minutes per unit. How do I go about calculating how long the customer waiting time will be in seconds, on average?
Seventy-five percent of households say they woud feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings.
prizes and the chances of winning in a sweepstakes are given in the table below.prizechances250000001 chance in
Compute the correlation coefficient and interpret it. Compute the mean square error MSE. Compute the standard error of the estimate. Compute the estimated standard deviation of b1.
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