請計算母體比例區間估計所需的樣本數,當信心水準為95%、抽樣誤差小於等於
0.1,且母體比例為0.8。
113
57
93
62
假設抽樣誤差不超過±5%、信心水準為95%、標準差的估計值為25,請問我們
需要抽取多少樣本?
101
85
97
90
何謂古典機率,請說明之。(5%)
請說明常態機率分配為基礎的經驗法則與柴比雪夫定理(Chebyshev’s Theorem)
在統計學上有何相同目的,以及有什麼不同?(10%)
Interaction in an experimental design can be tested in
a completely randomized model
a randomized block model
a two-factor model
all ANOVA models
In testing a hypothesis using the χ 2 test, the theoretical frequencies are
based on the
null hypothesis
alternative hypothesis
normal distribution
none of the above
A computer used by a 24-hour banking service is supposed to randomly
assign each transaction to one of 5 memory locations. A check at the end of
a day’s transactions gave the counts shown in the table to each of the 5
memory locations, along with the number of reported errors.
The bank manager wanted to test whether the proportion of errors in
transactions assigned to each of the 5 memory locations differ. Which test
would be used to properly analyze the data in this experiment?
test for independence
test for difference between proportions
ANOVA F test for main treatment effect
test for goodness of fit
What do we mean when we say that a simple linear regression model is
“statistically” useful?
All the statistics computed from the sample make sense.
The model is an excellent predictor of Y.
The model is “practically” useful for predicting Y.
The Variance Inflationary Factor (VIF) measures the
correlation of the X variables with the Y variable
correlation of the X variables with each other
contribution of each X variable with the Y variable after all other X
variables are included in the model
standard deviation of the slope
北部某濱海公路一危險路段每週發生意外事故的件數以隨機變數X 表示,依據過
去100 週來記錄的下列樣本資料如下:
可觀看題目詳解,並提供模擬測驗!(免費會員無法觀看研究所試題解答)