SOLVED

32) Timing a sample of a worker’s performance and using it as a basis for setting a standard time describes which of the following? A) predetermined time standards B) time studies C) work sampling D) methods time measurement E) left-hand, right-hand charting 33) A manager who is conducting a time study now needs an accuracy of ±0.1 minutes, rather than ±0.2 minutes as in the past. Because of this change in accuracy, the new required sample size becomes: A) one-fourth as large. B) one-half as large. C) twice as large. D) four times as large. E) one-tenth larger. 34) In time studies, normal time is: A) average observed time multiplied by a performance rating factor. B) larger than standard time. C) determined by historical experience. D) converted to standard time by the performance rating factor. E) one hour later during the summer months. 35) The smaller the percentage established for allowances: A) the closer is normal time to standard time. B) the closer is average observed time to normal time. C) the larger is the performance rating factor. D) the larger is the required sample size. E) the larger is the number of observations in the work sampling. 36) In time studies, personal time allowances are often established in which of the following ranges? A) 0 – 2% B) 3 – 5% C) 4 – 7% D) 6 – 10% E) 10 -15% 37) The average observed time for a given job is 10 minutes. The performance rating is 80%, and allowances are set by contract at 10%. What is the standard time? A) 8.80 minutes B) 8.88 minutes C) 10.00 minutes D) 19.00 minutes E) 19.80 minutes 38) The data below represent time study observations for an assembly operation. Assume a 7% allowance factor. What is the normal time for element 3? Observations (times in minutes) Element Performance Rating 1 2 3 4 5 1 100% 1.5 1.6 1.4 1.5 1.5 2 90% 2.3 2.2 2.1 2.2 2.4 3 115% 1.7 1.9 1.9 1.4 1.6 4 100% 3.5 3.6 3.6 3.6 3.2 A) 1.7 min. B) 1.96 min. C) 2.11 min. D) 10.1 min. E) 11.2 min. 39) The accuracy of a labor standard is to be within ± 5%, and the confidence level is 95%. The standard deviation of the sample is 2 and the mean is 8. What sample size should be used? A) 8 B) 10 C) 96 D) 127 E) 68 40) Which of these is the most common predetermined time standard? A) CSD B) TMU C) RCH D) SAE E) MTM 41) A work sampling study requires an acceptable error level of 10 percent and z = 2 for 95.45 percent confidence. The adequate sample size is ________ if the sample proportion is thought to be as large as 50 percent, but ________ if the sample proportion is thought to be about 20 percent. A) 50; 20 B) 100; 64 C) 100; 16 D) 20; 50 E) 200; 80