![]() ![]() A numerical value used as a summary measure for a sample, such as sample mean, is known as a For Z =5, state the Chebychev's inequality.ĭirections: Answer all Questions and please give me a justification on why you chose that answer. The descriptive measure of dispersion that is based on the concept of a deviation about the mean isĤ0. only when the data are from a populationģ9. ![]() whenever computer packages for descriptive statistics are unavailableĭ. only when individual data values are unavailableĬ. as much as possible since computations are easierī. When should measures of location and dispersion be computed from grouped data rather than from individual data values?Ī. The measure of dispersion that is influenced most by extreme values isģ8. the grouped data computations are used only when a population is being analyzedģ7. the grouped data result is more accurate than the ungrouped resultĬ. data values are treated as if they occur at the midpoint of a classī. In computing descriptive statistics from grouped data,Ī. the data set could be either a sample or a populationģ6. If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?Ĭ. Which of the following is not a measure of dispersion?ģ5. The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway.ģ2. The standard deviation of the sample equalsĪ researcher has collected the following sample data.Ī researcher has collected the following sample data. The variance of a sample of 81 observations equals 64. The standard deviation of a sample of 100 observations equals 64. This is an example ofĢ0.Ě tabular summary of a set of data showing the fraction of the total number of items in several classes is aĢ1. On the basis of this information, the professor states that the average age of all the students in the university is 21 years. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example ofġ9.Ě statistics professor asked students in a class their ages. In a sample of 800 students in a university, 160, or 20%, are Business majors. The most frequently occurring value of a data set is called theġ8. ![]() The value that has half of the observations above it and half the observations below it is called theġ7. sometimes greater than and sometimes less than zero, depending on the data elementsġ6. The sum of deviations of the individual data elements from their mean isĬ. is the average value of the two middle items when all items are arranged in ascending orderġ5. is the average value of the two middle itemsĭ. If a data set has an even number of observations, the medianī. Which of the following is not a measure of central location?ġ4. The difference between the largest and the smallest data values is theġ3. The cumulative relative frequency for the class of 10 - 19ġ2. can not be determined from the information givenġ1. The relative frequency of students working 9 hours or lessĭ. can not be determined without the original dataġ0. The number of students working 19 hours or lessĭ. The following data show the number of hours worked by 200 statistics students.Ĩ. Since the mode is the most frequently occurring data value, it In a five number summary, which of the following is not used for data summarization?ħ. The sum of the percent frequencies for all classes will always equalĦ. computed by summing all the data values and dividing the sum by the number of itemsĥ. computed by summing the data values and dividing the sum by (n - 1)ĭ. always smaller than the mean of the populationĬ. always equal to the mean of the populationī. can never be smaller than the population parameterĪ. can never be equal to the population parameterĭ. can never be larger than the population parameterī. Since the population size is always larger than the sample size, then the sample statisticĪ. In the following multiple choice questions, circle the correct answer.ġ.Ě numerical value used as a summary measure for a sample, such as sample mean, is known as aĢ. This content was COPIED from - View the original, and get the already-completed solution here! Not what you're looking for? Search our solutions OR ask your own Custom question. ![]()
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