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Measurements made on the internally compensated amplifiers listed below provide the dc gain and the frequency at which the gain has dropped by 20 dB. For each, what are the 3 dB and unity-gain frequencies?
(a) 2 × 10z V/V and 5 × 102 Hz
(b) 20 × 105 V/V and 10 Hz
(c) 1800 V/V and 0.1 MHz
(d) 100 V/V and 0.1 GHz
(e) 25 V/mV and 250 kHz
Once again, suppose that the standard deviation of the average or median is $5.00. Which is the probability that the average or median of the sample is greater than $22.50 but less than $25.00?
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
Replacement times for TV sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years. Find the probability that a randomly selected TV will have a replacement time less than 5 years.
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Connie's Apparel was one of Flashner's clients. Connie's Apparel made a profit last year. What is the probability that it was given an original rating of poor?
If one item is chosen at random, what is the probability that it is less than 9.1 inches long? what is the probability that exactly 46 will grow into a healthy plant?
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments.
Shoveling Heart Rates Because cardiac deaths appear to increase after heavy snowfalls, an experiment was designed to compare cardiac demands of snow shoveling to those of using an electric snow thrower.
Calculate the margin of error that would be used to determine a 99% confidence interval for the mean pulse rate of all women.
A hypothesis could be that the rate of teenage crime (13-19 year olds) 50 years ago in the United States was significantly lower than the rate of teenage crime is today.
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
The strength of a standard structural steel for a certain construction project follows a normal distribution with mean 20 N/mm2 and variance 16 N/mm2. Find the probability that a randomly selected specimen from a supply batch of this steel has s..
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