Psychological Statistics Set 2
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This set of Psychological Statistics Multiple Choice Questions & Answers (MCQs) focuses on Psychological Statistics Set 2
Q1 | Which of the following statements is true about sampling distributions?
- distributions formed by sample values
- formed from a population distribution known or assumed.
- a number of sampling distributions is possible from a population
- all of the above.
Q2 | Which of the following is standard error?
- mean of sampling distribution
- standard deviation of population distribution
- mean of population distribution
- standard deviation of sample distribution.
Q3 | Which of the following are true about standard error?
- gives an idea about unreliability of the sample
- gives an idea about confidence limits of parameter values
- both (a) and (b)
- none of these
Q4 | Which of the following is a statistically large sample?
- 29
- 45
- 16
- none of these
Q5 | The term statistical significance refers to ________
- how important the data are for research on the topic
- the conclusion that there are no reasonable alternative explanation
- the representativeness of the sample
- the inference that the observed effects are unlikely to be due to chance.
Q6 | If we take level of significance as 0.01 then the confidence limit will be
- 1%
- 0%
- 99%
- 100%
Q7 | Critical ratio for large independent sample is given by the formula
- z = standard deviation mean
- z = standard error difference between means
- z = se of the difference difference between means
- none of these
Q8 | The critical ratio is found to be 2.63 while testing H0: 1=2 against H1: 1 2. Thenwhich of the following statements is true?
- h0 is accepted at 0.05 level
- h0 is rejected at 0.05 level
- h0 is accepted at 0.01 level
- h0 is rejected at 0.01 level
Q9 | While dealing with small samples, preference is given to
- estimating the population value
- testing a given hypothesis
- both (a) and (b)
- none of these
Q10 | The critical region is the region of
- rejection of h0 when h0 is false
- acceptance of h0 when h0 is false
- rejection of h0 when h0 is true
- none of these
Q11 | ‘Student’ was the pen name of
- ramanujan
- gosset
- garrette
- none of these
Q12 | Under which of the following circumstances ‘t’ distribution is used?
- sample size less than or equal to 30
- population standard deviation is unknown
- both (a) and (b)
- none of these
Q13 | Which of the following are the properties of ‘t’ distribution?
- ranges from minus infinity to plus infinity
- ‘t’ distribution does not vary with ‘n’
- both (a) and (b)
- none of these
Q14 | As sample size increases the ‘t’ distribution approaches a
- binomial distribution
- gamma distribution
- poisson distribution
- normal distribution
Q15 | The degrees of freedom for which the tabled ‘t’ value is found for test of significanceof mean is given by
- n
- n – 2
- n – 1
- none of these
Q16 | The degrees of freedom for testing significance of difference between two means forsmall independent samples is
- n1 + n2
- n1 + n2 -1
- n1 + n2 – 2
- none of these
Q17 | Which of the following is the ‘t’ value for the following data (small independent samples)X1= 12, X2 =11, n1 =5, n2=7, s1 = 1.12, s2 = 2.31
- 8.9
- 0.35
- 0.89
- 0.79
Q18 | Normal distribution was defined specially by ------- a) Laplace b) Gauss c) DeMoivre d) None of these59.Which of the following is significance of normal distribution in statistical analysis?
- many of the dependent variables are commonly assumed to be normally distributed
- many of the statistical techniques in inferential statistics assumes normality of variable.
- the theoretical distribution of the hypothetical set of sample means is approximately normal.
- all of the above
Q19 | Which of the following is incorrect about normal distribution?
- it is symmetrical with respect to the ordinate at mean.
- mean, median and mode coincide
- ordinate is minimum at the mean
- none of these
Q20 | A normal curve shows 1. a distribution of mentally normal persons 2. population distributed equally in various parts3. greater percentage of cases distributed about the mean score 4. lesser percentage of cases belonging to extreme scores
- only 1 and 2 are true
- only 3 and 4 are true
- all are true
- all are false
Q21 | A mesokurtic distribution curve is a
- normal probability curve
- bell shaped curve
- both (a) and (b)
- none of these
Q22 | A leptokurtic distribution shows
- a bell shaped curve
- skewness
- steep rise in the middle
- upto some extent it shows all of these
Q23 | Which of the following statement is true about normal curve?
- the curve extends from - to +
- good model for many naturally occurring distributions.
- fifty percent of the scores are below the mean and fifty percent above it.
- all of the above
Q24 | Which of the following is application of normal curve?
- used to convert a raw score into standard score
- useful in calculating percentile rank of scores
- for normalizing a given frequency distribution
- all of the above