Question 19 {2 points) What effect would increasing the sample size have on a confidence interval? 0 A. The confidence interval would increase in size. 0 B. The confidence interval would decrease in size. 0 C. The confidence interval 'Is unaffected by sample size. 0 D. The confidence interval could either increase or decrease in size. Question 20 {2 points) What is the variance for the following set of scores: 2, 2. 2, 2, 2. Question 11 {2 points) What is the correct decision in a hypothesis if the data produce a t-statistic that is in the critical region? Q A Reject HO O B. Fail to reject HO O c. Reject H1 0 D. Fail to reject H1 Question 12 {2 points) A population has a u=50 and o=10. If these scores are transformed into z-scores, the population of z-scores will have a mean and standard deviation of: O A \"=50 and cr=10 O B. \"=50 and o=1,96 O c.u=1 and cr=0 O D. \"=0 and 0'=1 Question 13 {2 points) To enhance a procedure the control charts and procedures of descriptive statistics are classified into 0 A. Behavioural Tools 0 B. Serial Tools 0 C. Industry Statistics 0 D. Statistical Tools Question 14 {2 points) Of the following Z-score values, which one represents the location closest to the mean? 0 A z=+0.5 O B. z=+1,o Question 15 {2 points) The scale applied in statistics which imparts a difference of magnitude and proportions is considered as O A. Exponential Scale 0 B. Goodness Scale 0 c. Ratio Scale 0 D. Satisfactory Scale Question 16 (2 points) A teacher asks students to identity their favourite reality television show. What type of measurement scale do the different television shows make up? 0 A. Nominal O B. Ordinal O C. Interval O D. Ratio Question 17 (2 points) A perfect random number table would be one in which every digit has been entered O A. Chronologically O B. Sequentially O C. Randomly O D. Arbitrarily Question 18 {2 points) Five-point Likert scales (strongly disagree, disagree, neutral, agreeI strongly agree} are frequently used to measure motivations and attitudes. A Likert scale is a: O A. Discrete and ordinal varriables only. 0 B. Ordinal and categorical variables only. 0 C. Categorical and discete variables only. 0 D. Discrete, ordinal and categorical variables