Questions are in the field of Statistics for business set 1

Questions are in the field of Statistics for business set 1

1. Given the data set 3, 6, 2, 9, 1, 0, compute ??(x + 1)2.A. 25B. 625 C. 175D. 1372. To answer the question, refer to the following list of raw data.63, 71, 72, 77, 77, 78, 86, 77, 88, 88What is the median for the data?A. 77.5B. 88C. 77.7D. 773. Which of the following statements about interpreting standard deviation is true?A. The Empirical Rule cant be applied unless the frequency distribution is mound-shaped and symmetric. Chebyshevs Rule can be applied to any data set, regardless of the shape of its frequency distribution.B. Neither the Empirical Rule nor Chebyshevs Rule can be applied to data unless the frequency distribution is mound-shaped and symmetrical.C. Neither Chebyshevs Rule nor the Emprical Rule require any assumptions about the frequency distribution.D. Chebyshevs Rule cant be applied unless the frequency distribution is mound-shaped and symmetric. The Empirical Rule can be applied to any data set, regardless of the shape of its frequency distribution.4. To answer the question, refer to the following data.Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6What is the variance for the data values?A. 1.6B. 2.844C. 1.687D. 2.565. A study was conducted of the 12-month earnings per share for two categories of airline companies, with the result shown in the chart below. Based on the data, which of the following statements is correct?Large SmallAirlines Airlines$4.36 $1.606.19 1.980.42 1.033.73 0.210.26 1.156.27 4.190.591.521.974.570.05A. The large airlines have a mean earnings per share of 3.40, and the small airlines have a standard deviation of 2.08.B. The large airlines have a variance of 4.04, and the small airlines have a variance of 8.30.C. The large airlines have a standard deviation of 2.88, and the small airlines have a standard deviation of 4.04.D. The large airlines have a mean earnings per share of 3.40, and the small airlines have a mean earnings per share of 1.22.Note: Answer A seems to be the closest, but the values listed do not exactly match the actual values. The actual values are:Large Airlines Small AirlinesMean 3.3983 1.1073Standard deviation 2.8811 2.0101Variance 8.3007 4.04046. Which of the following involves inferential statistics as opposed to descriptive statistics?A. A class of 50 statistics students earned an average grade of 73.5.B. A local cable system, using a sample of 500 subscribers, estimates that 40 percent of its subscribers watch a premium channel at least once per day.C. The city business office reported 35 building permits for new single-family housing units.D. The Alcohol, Tobacco and Firearms department reported that Houston had 1,791 registered gun dealers in 1997.7. Use the following data sample to answer the question.4, 14, 6, 9, 21, 3, 7, 10What is the variance of this data sample?A. 4.31B. 243.5C. 5.90D. 34.798. If there are an odd number of data values in a set, the median will be theA. average of all of the values divided by the number of values in the set.B. value that appears in the center.C. value that appears the greatest number of times.D. average of the two end values.9. Which type of plot takes quantitative data and forms classes out of it, thus turning it into qualitativedata?A. Pie chartB. Dot plotC. HistogramD. Stem-and-leaf plot10. To answer the question, refer to the following list of raw data.63, 71, 72, 77, 77, 78, 86, 77, 88, 88What is the mode for the data?A. 88B. 77.5C. 77D. 77.711. To answer the question, refer to the following list of raw data.63, 71, 72, 77, 77, 78, 86, 77, 88, 88What is the mean for the data?A. 88B. 77.7C. 77.5D. 7712. Several ways to make a bar graph deceptive appear below. Which of these is sometimes used toexaggerate differences from one data value to the next?A. Starting the vertical axis at a point greater than zeroB. Making the graph taller than it needs to beC. Making the graph shorter than it needs to beD. A gap in the vertical axis13. When obtaining data by its most important to inquire about the purposes of the originalexperimenter.A. conducting a surveyB. reading a published sourceC. collecting data observationallyD. performing a designed experiment14. Which of the following statements is true about a stem-and-leaf plot?A. It uses vertical bars to illustrate a probability distribution.B. It separates data at the decimal point, creating horizontal rows whose values are close together.C. Stem-and-leaf plots are histograms whose bars have been arranged in decreasing order of frequency.D. It involves creating columns of dots, one for each datum in the sample.15. If a great many data values cluster to the left of a data distribution, which then tails off to the right, the distribution is referred to asA. uniform.B. rightward skewed.C. leftward skewed.D. normal.16. Use the following data sample to answer the question.4, 14, 6, 9, 21, 3, 7, 10What is the mean of this data sample?A. Theres no mean value.B. 9.25C. 7D. 817. When a sample is taken from a larger population, this suggests that which of the following will be used?A. Independent eventsB. Descriptive statisticsC. Computation of a sample meanD. Inferential statistics18. A population is a collection of about which we will measure certain characteristics orproperties, called .A. people, traitsB. individuals, sample valuesC. data, numbersD. experimental units, variables19. Use the following data sample to answer the question.4, 14, 6, 9, 21, 3, 7, 10What is the median of this data sample?A. Theres no median value.B. 8C. 7D. 9.2520. What is the difference between a histogram and a bar chart?A. A histogram and a bar chart both reflect qualitative data.B. A histogram reflects qualitative data, while the bar chart represents quantitative data.C. The adjacent rectangles in a bar chart have a gap, while those for a histogram dont.D. The adjacent rectangles in a histogram have a gap, while those for a bar chart dont.


Comments are closed.