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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