3. A certain alphabet has 50 different letters. If a person types at the rate of...
1.The Greek alphabet has 24 letters, in how many ways can 3 different Greek letters be selected if order DOES matter? 2.The Greek alphabet has 24 letters, in how many ways can 3 different Greek letters be selected if order does NOT matter?
A digital signal has a baud rate of 20K levels/sec. What is the baud interval? A device sends data at 200K baud using 8 bits per level. How many bits per second does the device send?
A certain lottery game asks a person to choose five numbers between 1 and 50 (nonrepeating) and then one "powerball" number between 1 and 30. In order to win the jackpot, all 6 numbers must match. (a) What is the probability of winning the jackpot? (b) To win the second grand prize, the person must match only 3 of the 5 numbers and cannot match the powerball number. What is the probability of winning the second prize?
1. A mono audio signal has a bit rate (sampling rate times bits per sample) of 35 MB/sec. How many seconds of such audio can be stored on a CD of 700 MB? 2. An audio signal is sampled at a rate of 256 samples per second and 8 bits are assigned to each sample. Calculate the file size of 4 seconds of stereo audio. 3. Following is(are) advantages of digital audio as compared to analog audio duplication flexibility environmental...
Three types of drill bits can be used in a certain manufacturing operation. A bright high-speed steel (HSS) bit is the least expensive to buy, but it has a shorter life than either gold oxide or titanium nitride bits. The HSS bits will cost $3500 to buy and will last for 3 months under the conditions in which they will be used. The operating cost for the HSS bits will be $2000 per month. The gold oxide bits will cost...
Manufacture of a certain component requires three different machining operations. The amount of time each operation requires (operation time) is normally distributed with mean 10 and variance 4. The three operation times are independent. Referring to the previous manufacturing example, now suppose that the cost for the first machining operation is $1 per minute. That for the second and third operations are $2 per minute and $3 per minute, respectively. What is the probability that total cost for making the...
Problem 3: Two types of drill bits are being tested for wear. The two types of drill bits are each tested on 10 different machines, each used for a variety of parts. The data on wear in mm, over a 2-week testing cycle is shown below. Drill Bit Machine 1 2.6 1 2 3 2.9 3.2 3.0 2.4 1.4 3.4 1.8 3.3 2.4 2.0 2.8 2.7 3.5 3.0 2.7 3.1 3.6 10 2.8 (a) Is there evidence to suggest that...
A person is recording a song on their computer, using a sampling rate of 48 kHz with each sample having a size of 2 bytes. i.How many bits are in each sample? ii.How many bits per second are processed while the song is being recorded? Write your answer in scientific notation. iii.If the song is 3 minutes and 14 seconds long, how many bits are processed in total? Write your answer in scientific notation. iv.If the song had been recorded...
and are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. Use the two-sample t test at significance level 0.01 to test Hi H, - H, = -10 Suppose versus H - l, < -10 for the following data: m = 7, x = 115.8, s = 5.08, 7, y = 129,4, and s = 5.31. Calculate the test statistic and determine the P-value. (Round your test statistic...
5. A certain model of laptop computer has hardware failures of three different types: hard drive failure, battery failure, and other hardware failure. It was found that: 54% 43% 30% 18% 10% 1% of failures did not involve the battery at all of failures did not involve the hard drive at all of failures were of only the battery of failures involved a failure of hardware other than a battery or hard drive of failures involved neither the battery nor...