[{"id":59877,"question":"If 1-α = 0.90, the value of Z<sub>a/2</sub> is:","choices":[{"text":"1.645","value":"A"},{"text":"1.96","value":"B"},{"text":"2.326","value":"C"},{"text":"2.575","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":59876,"question":"The following statistic are unbiased estimators:","choices":[{"text":"The Sample mean","value":"A"},{"text":"S<sup>2</sup> =&nbsp;Σ(X - X)<sup>2</sup>/n-1","value":"B"},{"text":"The sample proportion","value":"C"},{"text":"All the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":59875,"question":"The distance between an estimate and the estimated parameter is called:","choices":[{"text":"Sampling error","value":"A"},{"text":"Standard error","value":"B"},{"text":"Bias","value":"C"},{"text":"Error of estimation","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":59874,"question":"By increasing the sample size, the precision of confidence interval is:","choices":[{"text":"Decreased","value":"A"},{"text":"Increased","value":"B"},{"text":"Constant","value":"C"},{"text":"Unchanged","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":59871,"question":"If (1-α) is increased, the with of a confidence interval is:","choices":[{"text":"Decreased","value":"A"},{"text":"Increased","value":"B"},{"text":"Constant","value":"C"},{"text":"Same","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":59870,"question":"(1-α) is called:","choices":[{"text":"Critical value","value":"A"},{"text":"Level of significance","value":"B"},{"text":"Level of confidence","value":"C"},{"text":"Interval estimate","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":59867,"question":"The probability associated with confidence interval is called:","choices":[{"text":"Level of confidence","value":"A"},{"text":"Confidence coefficient","value":"B"},{"text":"Both A and B","value":"C"},{"text":"Confidence limits","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":59865,"question":"The endpoints of a confidence interval are called:","choices":[{"text":"confidence coefficient","value":"A"},{"text":"Confidence limits","value":"B"},{"text":"Error of estimation","value":"C"},{"text":"Parameters","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":59864,"question":"A range of values within which the population parameter is expected:","choices":[{"text":"Confidence interval","value":"A"},{"text":"Confidence coefficient","value":"B"},{"text":"Confidence limits","value":"C"},{"text":"Level of significance","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":59851,"question":"Estimate is the observed value of an:","choices":[{"text":"Unbiased estimator","value":"A"},{"text":"Estimation","value":"B"},{"text":"Estimator","value":"C"},{"text":"Interval estimation","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":59839,"question":"Statistic is an estimator and its calculated value is called:","choices":[{"text":"Biased estimate","value":"A"},{"text":"Estimation","value":"B"},{"text":"Interval estimate","value":"C"},{"text":"Estimate","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":59837,"question":"A single value used to estimate a population value is called:","choices":[{"text":"Interval estimate","value":"A"},{"text":"Point estimate","value":"B"},{"text":"Confidence interval","value":"C"},{"text":"Level of confidence","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":59833,"question":"Estimation is of two types:","choices":[{"text":"One sides and two sides","value":"A"},{"text":"Type I and type II","value":"B"},{"text":"Point estimation and interval estimation","value":"C"},{"text":"Biased and unbiased","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":59821,"question":"Statistical inference has two branches namely:","choices":[{"text":"Level of confidence and degrees of freedom","value":"A"},{"text":"Biased estimator and unbiased estimator","value":"B"},{"text":"Point estimate and interval estimate","value":"C"},{"text":"Estimation of parameter and testing of hypothesis","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":59819,"question":"The process of making estimates about the population parameter from a sample is called:","choices":[{"text":"Statistical independence","value":"A"},{"text":"Statistical inference","value":"B"},{"text":"Statistical hypothesis","value":"C"},{"text":"Statistical decision","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":4590,"question":"","questionImage":"4590_16-q.jpg","choices":[{"text":"best estimators","value":"A"},{"text":"biased estimators","value":"B"},{"text":"unbiased estimators","value":"C"},{"text":"normal estimators","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":4587,"question":"","questionImage":"4587_10-q.jpg","choices":[{"text":"biased","value":"A"},{"text":"unbiased","value":"B"},{"text":"positively biased","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2}]