A model being fitted is said to be adequate if the residual plot:
displays random pattern
A model is said to be adequate if the residual plot displays a random pattern. This indicates that the model has successfully captured the underlying structure of the data, and there are no remaining patterns to be explained by the model.
The mean absolute deviation of 25, 30, 27, 40 and 35 is:
If a large sample of size n is taken from a normal population with mean μ and standard deviation σ, the 95% confidence interval for the unknown parameter μ is:
Suppose a sample of size 36 is drawn from a population with mean 2 and variance 25 using simple random sampling with replacement. The standard error of x̄ is:
For an experiment with sample space S, the events Ai, i = 1, 2, 3, ... are mutually exclusive and exhaustive if:
From a population of a large number of workers with a standard deviation of 5, a sample is drawn and the standard error is found to be 0.5. What is the sample size?
If x̄ is the mean of a sample from N(μ, 1), then the maximum value of x̄ is:
Let N be the size of a population and n be the size of the sample. Then the efficiency of SRSWOR with respect to SRSWR is:
Pearson's correlation coefficient is ____________________.
If the sum of the squares of difference of ranks of 6 candidates in two criteria is 21, the rank correlation coefficient is __________.
A doctor finds of all patients that visits his clinic the probability that a patient is alcoholic given that the patient has liver disease is 0.08. The probability that a patient is alcoholic is 0.06 and the probability that a patient has liver disease is 0.12. Find the probability that a patient has liver disease given that he or she is alcoholic?
Which of the following are correct about Questionnaire?
(a) In open ended question, specific responses are taken through ranking, scaled items and categorical responses.
(b) In ranking, respondent place the response in a rank order according to some criteria.
(c) In scaled item, respondent indicate the strength of their agreement only.
(d) In categorical response, respondent are given only two responses such as 'yes' or 'no'.
Choose the correct option from the codes :
Arrange in sequence the steps involved in the sampling process
A. Choose between probability and nonprobability sampling
B. Specify sampling unit
C. Validate sample
D. Determine the necessary sample size
E.Select appropriate sampling frame
Choose the correct answer from the options given below:
Which one of the following is NOT an essential characteristic of data?
The mean absolute deviation of 25, 30, 27, 40 and 35 is: