Question

A 1-kHz sine wave is sampled at 1.5 kHz. What is the expected alias frequency (5 points) 1. A certain length measurement is performed 500 times. The mean value is the error in the measurement, how many readings fall within 5.15cm of the 3. The lighting department of a city has installed 2000 electric lamps with an a. After what period of lighting hours would we expect 10% of the lamps b. How many lamps may be expected to fail between 900 and 1300 hrs 2. 5.0m, and the standard deviation is 2cms. Assuming a normal distribution for mean value (5 points) average life of 1000 hrs and a standard deviation of 200 hrs. (10 Points) to fail

Answer 1

2 iv 5-D,0515 515 o SS A. 4-S 22.55 257S 22.575 2. 4l1 ithin 5n of mean value eadings 49

@ probability __ it failure Pro hab ibu ore talae -)-マ31 そーて LCSD : ester 744 hrs 10%-of lan ta fail on hetli een 2 and z is Tcqinced area yom table A.6247 25D eletr is lanps fail bween 90 ars to

1. 0.5kHz

2. 495 readings

3.a)744hrs

b)1250