Business Statistics and Research Methods MCQs

Which of the following statements relating to the sampling theory are correct? i. The values of the statistical measures based on the sampled units ae called values of statistic. ii. In the simple random sampling technique, the element of the population and the unit of the sample are different. iii. Snow-ball sampling technique is a probability based sampling technique. iv. The 'law of statistical regularity' and the 'law of inertia of large numbers' are the main bases of the sample to become representative of the population. Choose the correct answer from the options given below:

Previous probabilities in Bayes Theorem that are changed with help of new available information are classified as:

Yates has suggested a correction in chi-square value, when cell frequencies are

Statement I When a null hypothesis gets rejected in statistical hypothesis testing, it is known as II type error in hypothesis testing. Statement II When a sample is small sized and parametric value of the standard deviation is not known, Z-test is the most appropriate test for hypothesis testing.

A machine produced 20 defective articles in a batch of 400. After overhauling, it produced 10% defectives in a batch of 300. Which test of hypothesis can be applied to the above situation to examine whether the machine has improved?

Z-test is closely related to which of the following test?

Identify which of the following steps would be included in hypothesis testing. 1. State the null and alternative hypothesis. 2. Set the significance level before the research study. 3. Eliminate all outliers. 4. Obtain the probability value using a computer programme such as SPSS. 5. Compare the probability value to the significance level and make the statistical decision. Select the correct answer using the options given below

Correlation coefficient is taken to be significant, if

Which of the following is not a type of non-probability sampling as it seems to be more objective in nature?