Value of the test statistic | 2.8092 |
Critical value at the 0.05 significance | 1.96 |
Critical value at the 0.01 significanae level | 2.5
A. one-tailed test and can reject his null hypothesis. B. two-tailed test and can reject his null hypothesis. C. one-tailed test and cannot reject his null hypothesis. 更多"An analyst conducted a significance"的相关试题: [单项选择]An analysis conducted a significance test to determine if the relationship between two variables was real or the result of chance. His null hypothesis is the that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different from zero. He developed the following information: Value of the test statistic 2.8092 Critical value at the 0.05 significance level 1.96 Critical value at the 0. 01 significance level 2.58 The analyst conducted a:（）
A. one-tailed test and can reject-his null hypothesis. B. Two-tailed test and can reject his null hypothesis. C. One-tailed test and cannot reject his null hypothesis. [单项选择]An analyst conducts a two-tailed test to determine whether differences between the means of two populations exist: H0:μ1-μ2=0 versus H2:μ1-μ2≠0. Assume that the populations are independent, normally distributed, and have unequal and unknown variances. The critical value with 50 degrees of freedom is 2. 126. The computed test statistic is t=1.753. Using a significance level of x=0.05, which of the following statements is TRUE（）
A. Use a t-test to reject the null hypothesis and accept the alternative hypothesis. B. Use a t-test to accept the null hypothesis and reject the alternative hypothesis. C. Use a z-test to reject the null hypothesis and accept the alternative hypothesis. [单项选择]An analyst conducts a two - tailed test to determine whether differences between the means of two populations exist: H0: μ1-μ2=0 versus H2: μ1-μ2≠0. Assume that the populations are independent, normally distributed, and have unequal and unknown variances. The critical value with 50 degrees of freedom is 2.126. The computed test statistic is t=1.753. Using a significance level of x=0.05, which of the following statements is TRUE（）
A. Use a t- test to reject the null hypothesis and accept the alternative hypothesis. B. Use a t -test to accept the null hypothesis and reject the alternative hypothesis. C. Use a z- test to reject the null hypothesis and accept the alternative hypothesis. [单项选择] Human resource is one of the key factors in determining organizational coping and profitability. Despite adverse market conditions and fluctuations, many organizations have implemented changes that seek to improve their competitiveness. The consequences of organizational change, however, can vary. Sometimes, the employees may accept the change readily; at other times, the change is met with resistance and dissatisfaction of the employees.
Change and stress are closely related. Because of the feelings of uncertainty, insecurity, and threat that it invokes, organizational change can be extremely stressful for the individual. When change occurs, employees may be stressed by role overload, role ambiguity, and role boundary.
According to Selye, a little stress is actually good. When stress is at its optimal level, it can increase human resource potential as it spurs individuals to achieve their best working performances.
However stress can become negative and destructive
A. Change can be the motivation of stress and through their mutual interaction, there will be improvement. B. Stress causes change to occur, and may bring negative effects such as the change of the job and the reduction of the salary. C. Organizational change is a primary cause of stress and when change occurs, employees often experience role stress. D. Change and stress are a pair of phenomena that will both appear in the process of employment. [单项选择]Climate, more than any other single factor, determines the distribution of life on earth. Climatic boundaries establish the limits which organisms can survive. Plants, even more than animals, must be well adapted to climate in order to survive. They cannot move about or take shelter but must be equipped to endure whatever weather conditions are likely to occur. In the harsh conditions of the tundra, for example, low growing mosses, lichens, and a few flowering plants all hug the ground for shelter from icy winds.
Animals, despite their ability to move about and find shelter, are just as much influenced by climate as plants are. Creatures such as the camel and the penguin are so highly specialized that they have an extremely limited distribution. Others, such as bears are flexible enough to adapt to a broad range of climates. Oceandwelling organisms are just as sensitive to climatic changes—in this case temperature and salinity—as land animals. Reef corals can survive only in clear A. kind of weather pattern B. form of sea life C. species of tundra plant D. type of miniature penguin 我来回答: 提交
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