QMB 3200 Guías de estudio, Notas de estudios & Resúmenes

What is the z score formula? - ANSWERS(the observation - mean) / standard deviation What does a z score tell us? - ANSWERShow many standard deviations a value of from the mean How do you find the range? - ANSWERSbiggest value minus smallest value What is the formula used in excel to find the range? - ANSWERS=max(array) - min (array) If a data set has an odd number of observations, the median a. Cannot be determined b. is the value of the middle item when all items are arranged in...

scatter diagram is a graphical presentation of the relationship between two quantitative variables. - True Concerning a frequency distribution, the _______ is the value halfway between the lower and upper class limits. - Class Midpoint Crosstabulation is a tabular presentation that can be used when - one variable is categorical and the other is quantitative, both variables are categorical, or both variables are quantitative.

Describes a model with a few number of terms - Parsimonious model True slope of line in simple linear regression - Beta1 A large sample - N greater than 30 # of dumy variables required to represent a QL var at 3 levels - 2

steps for using excel for statistical analysis - 1. enter/access data 2. enter functions & formulas 3. apply tools 4. editing options data - the facts and figures collected, analyzed, & summarized for presentation & interpretation data set - all the data collected for a particular analysis

point estimator - A sample statistic, such as bar(x), that estimates the value of the corresponding population parameter is known as a _____. narrower - Compared to the confidence interval estimate for a particular value of y (in a linear regression model), the interval estimate for an average value of y will be _____

QMB 3200 Actual Test with Questions and Answers|100% Solution Excel's __________ can be used to construct a crosstabulation. a.COUNTIF function b.PivotTable Report c.Chart Tools d.SUM function - B

In computing the standard error of the mean, the finite population correction factor is not used when: a. n ≥ 30 b. n/N ≤ 0.05 c. N/n ≤ 0.05 d. n/N > 0.05 - b. n/N ≤ 0.05 A sample statistic, such as x bar , that estimates the value of the corresponding population parameter is known as a: a. population parameter b. point estimator c. Both a parameter and a population parameter are correct. d. parameter - b. point estimato

The standard deviation of a point estimator is the - standard error Cluster sampling is - a probability sampling method The interquartile range is the difference between the - first and third quartiles A __________ can be used to graphically present quantitative data. - both a histogram and a stem-and-leaf display are correct

Descriptive Analytics - Describes Past Data Predictive Analytics - Uses past data to predict Future (inference) Prescriptive Analytics - Uses models to find Optimal Solution Scales of Measurement - Nominal & Ordinal (Categorical); Interval & Ratio (Quantitative)

_ data has the benefit of a true zero point - ratio a method of gathering data when subjects are exposed to certain treatments and the data of interest is recorded is known as ______ - experiments collecting data about the television viewers for the Summer Olympics is an example of using statistics in the field of ______ - advertising

QMB 3200 Exam Verified Questions with Correct Answers Graded A+ Data facts and figures collected, analyzed, or summarized Dataset all the data collected in an analysis Element the entity on which data is collected Variable characteristic of interest of an element Observation all variables associated Categorical numeric or ordinal values of measurement Quantitative uses numeric measures Cross Sectional data collected at a similar point in time Time Series data collected over a...