QMB3200 EXAM COMPLETE ALL QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW!!

QMB3200 EXAM COMPLETE ALL QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW!! The standard deviation of a point estimator is the - Answer- standard error Cluster sampling is - Answer- a probability sampling method The interquartile range is the difference between the - Answer- first and third quartiles A __________ can be used to graphically present quantitative data. - Answer- both a histogram and a stem-and-leaf display are correct The measure of variability easiest to compute, but seldom used as the only measure, is the - Answer- Range As the sample size increases, the variability among the sample means - Answer- decreases In a standard normal distribution, the range of values of z is from - Answer- minus infinity to infinity The t value with a 95% confidence and 24 degrees of freedom is - Answer- 2.064 The number of customers that enter a store during one day is an example of - Answer- a discrete random variable Quantitative data that measure how many are ________; quantitative data that measure how much are ________. - Answer- discrete; continuous Exhibit 2-3 The number of sick days taken (per month) by 200 factory workers is summarized below. Number of Days Frequency 0 - 5 120 6 - 10 65 11 - 15 14 16 - 20 1 Refer to Exhibit 2-3. The midpoint of the first class is - Answer- 2.5 For the standard normal probability distribution, the area to the left of the mean is - Answer- 0.5 Convenience sampling is an example of - Answer- a nonprobability sampling technique A p-value is the - Answer- Probability, when the null hypothesis is true, of obtaining a sample result that is at least as unlikely as what is observed A Type II error is committed when - Answer- a true alternative hypothesis is mistakenly rejected If a hypothesis is not rejected at a 5% level of significance, it will - Answer- also not be rejected at the 1% level Data collected at the same, or approximately the same, point in time are - Answer- cross-sectional data The level of significance in hypothesis testing is the probability of - Answer- Rejecting a true null hypothesis Z is a standard normal random variable. The P(1.05 £ z £ 2.13) equals - Answer- 0.1303 The standard deviation is the - Answer- positive square root of the variance __________ is a spreadsheet package. - Answer- Microsoft Excel If a hypothesis test leads to the rejection of the null hypothesis, a - Answer- Type I error may have been committed A researcher has collected the following sample data. 5 12 6 8 5 6 7 5 12 4 Refer to Exhibit 3-1. The 75th percentile is - Answer- 8 A frequency distribution is - Answer- a tabular summary of a set of data showing the number of items in each of several nonoverlapping classes A method of assigning probabilities that assumes the experimental outcomes are equally likely is referred to as the - Answer- Classical method A numerical measure computed from a sample, such as sample mean, is known as a - Answer- sample statistic