某公司擬推動品管圈,一部門被選定為實驗單位,用以瞭解推行品管圈後,該單
位之工作品質是否較為提昇,經由實驗結果來判斷是否全面實施,各部門全面實
施將較以往多出10%的人事與獎金預算。
(1) 指出上述實驗檢定之H0。(5分)
(2) 指出上述實驗檢定之Type I error 與Type II error。(10 分)
(3) 上述實驗檢定之顯著水準若由α = 0.05降為α = 0.01,對H0、Type I error、
Type II error 分別會造成什麼影響?(10 分)
A regression function for variables X and Y was derived as
y = 7.6 − 3.2x . Which of the following statements about X and Y is
true?
The correlation coefficient associated with this function would be
positive
X causes Y
If the correlation coefficient is 0, this indicates that there is no
relationship between X and Y
None of the above
When the error terms at successive points in time are significantly related.
The correlation in error terms is named.
Multicorrelation
Autocorrelation
Parallel correlation
Canonical correlation
Application of the least squares method results in values of the y
intercept and the slope which minimizes the sum of the squared deviations
between
the observed values of the dependent variable and the estimated values
of the dependent variable
the actual values of the dependent variable and the estimated values of
the independent variable
the observed values of the independent variable and the estimated
values of the independent variable
the actual values of the independent variable and the estimated values
of dependent variable
Which of the followings is a characteristic of the normal probabilities
distribution?
mean = media = mode
The standard deviation = 1
The mean = 0
The normal distribution is the limiting case of a Poisson distribution as
the sample size becomes large
Assume the test scores for 100 students in a course had a mean of 80 and
a variance of 25. Use Cebyshev’s theorem to estimate that at least how
many students pass the test (i.e. 60 ≤ score ≤ 100 )? __________.
the time between arrivals of customers at a particular intersection follows
an exponential probability distribution with a mean 15 minutes. The
probability that there will be 30 or more minutes between arriving
customers is __________.
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