Questions are in the field of statistics for business set 1


1. Given the facts set 3, 6, 2, 9, –1, 0, appraise Σ(x + 1)2.

A. 25

B. 625

C. 175

D. 137

 

2. To reply the investigation, connect to the forthcoming inventory of raw facts.

63, 71, 72, 77, 77, 78, 86, 77, 88, 88

What is the median for the facts?

A. 77.5

B. 88

C. 77.7

D. 77

 

3. Which of the forthcoming statements environing interpreting banner flexuosity is true?

A. The Empirical Rule can't be applied true the estimate division is mound-shaped and symmetric. Chebyshev's Rule can be applied to any facts set, unobservant of the fashion of its estimate division.

B. Neither the Empirical Rule nor Chebyshev's Rule can be applied to facts true the estimate division is mound-shaped and regular.

C. Neither Chebyshev's Rule nor the Emprical Rule demand any assumptions environing the estimate division.

D. Chebyshev's Rule can't be applied true the estimate division is mound-shaped and symmetric. The Empirical Rule can be applied to any facts set, unobservant of the fashion of its estimate division.

 

4. To reply the investigation, connect to the forthcoming facts.

Ten students were exemplificationd at chance from a student population. Each was asked how sundry courses he or she was planning on examineing in the upcoming year. The forthcoming is a inventory of the reputed facts appreciates:

1, 2, 2, 3, 4, 5, 5, 5, 5, 6

What is the disagreement for the facts appreciates?

A. 1.6

B. 2.844

C. 1.687

D. 2.56

 

5. A examine was conducted of the 12-month suitables per portion-out for two categories of airline companies, after a conjuncture the conclusion shown in the chart beneath. Based on the facts, which of the forthcoming statements is correct?

Large                     Small

Airlines                                Airlines

$4.36                     $1.60

6.19                        –1.98

–0.42                     1.03

3.73                        –0.21

0.26                        –1.15

6.27                        4.19

                                0.59

                                1.52

                                1.97

                                4.57

                                0.05

A. The extensive liveliness enjoy a mediocre suitables per portion-out of 3.40, and the fine liveliness enjoy a banner flexuosity of 2.08.

B. The extensive liveliness enjoy a disagreement of 4.04, and the fine liveliness enjoy a disagreement of 8.30.

C. The extensive liveliness enjoy a banner flexuosity of 2.88, and the fine liveliness enjoy a banner flexuosity of 4.04.

D. The extensive liveliness enjoy a mediocre suitables per portion-out of 3.40, and the fine liveliness enjoy a mediocre suitables per portion-out of 1.22.

 

                Note: Reply A seems to be the sealst, but the appreciates inventoryed do not exactly tally the objective   values. The objective appreciates are:

 

                                                                Large Airlines     Small Airlines

                Mean                                    3.3983                   1.1073

                Standard flexuosity          2.8811                   2.0101

                Variance                              8.3007                   4.0404

 

6. Which of the forthcoming involves inferential statistics as incongruous to descriptive statistics?

A. A arrange of 50 statistics students earned an mediocre space of 73.5.

B. A national cable adjust, using a exemplification of 500 subscribers, estimates that 40 percent of its subscribers observe a recompense machine at balanceest unintermittently per day.

C. The city calling service reputed 35 edifice permits for new single-family housing units.

D. The Alcohol, Tobacco and Firearms branch reputed that Houston had 1,791 registered gun dealers in 1997.

 

7. Use the forthcoming facts exemplification to reply the investigation.

4, 14, 6, 9, 21, 3, 7, 10

What is the disagreement of this facts exemplification?

A. 4.31

B. 243.5

C. 5.90

D. 34.79

 

8. If there are an odd estimate of facts appreciates in a set, the median conciliate be the

A. mediocre of all of the appreciates disconnected by the estimate of appreciates in the set.

B. appreciate that shows in the nature.

C. appreciate that shows the highest estimate of times.

D. mediocre of the two end appreciates.

 

9. Which archearchetype of contrive takes induced facts and forms arrangees out of it, thus turning it into induced

data?

A. Pie chart

B. Dot contrive

C. Histogram

D. Stem-and-leaf contrive

 

10. To reply the investigation, connect to the forthcoming inventory of raw facts.

63, 71, 72, 77, 77, 78, 86, 77, 88, 88

What is the mode for the facts?

A. 88

B. 77.5

C. 77

D. 77.7

 

11. To reply the investigation, connect to the forthcoming inventory of raw facts.

63, 71, 72, 77, 77, 78, 86, 77, 88, 88

What is the mediocre for the facts?

A. 88

B. 77.7

C. 77.5

D. 77

 

12. Several ways to perform a bar graph unfaithful show beneath. Which of these is casually used to

exaggerate dissimilitudes from one facts appreciate to the next?

A. Starting the perpendicular axis at a aim elder than zero

B. Making the graph taller than it needs to be

C. Making the graph shorter than it needs to be

D. A gap in the perpendicular axis

 

13. When obtaining facts by _______ it's most important to attempt environing the purposes of the original

experimenter.

A. conducting a survey

B. reading a published source

C. collecting facts observationally

D. performing a intended experiment

 

14. Which of the forthcoming statements is true environing a stem-and-leaf contrive?

A. It uses perpendicular bars to explain a verisimilitude division.

B. It separates facts at the decimal aim, creating vapid rows whose appreciates are seal concertedly.

C. Stem-and-leaf contrives are histograms whose bars enjoy been de- in decreasing adjust of estimate.

D. It involves creating columns of dots, one for each datum in the exemplification.

 

15. If a majestic sundry facts appreciates gathering to the left of a facts division, which then tails off to the suitable,

the division is connectred to as

A. uniform.

B. rightward skewed.

C. leftward skewed.

D. normal.

 

 

16. Use the forthcoming facts exemplification to reply the investigation.

4, 14, 6, 9, 21, 3, 7, 10

What is the mediocre of this facts exemplification?

A. There's no mediocre appreciate.

B. 9.25

C. 7

D. 8

 

17. When a exemplification is enthralled from a extensiver population, this suggests that which of the forthcoming conciliate be used?

A. Independent events

B. Descriptive statistics

C. Computation of a exemplification mediocre

D. Inferential statistics

 

18. A population is a store of _______ environing which we conciliate mete real characteristics or

properties, denominated _______.

A. people, traits

B. individuals, exemplification appreciates

C. data, estimates

D. experimental units, variables

 

19. Use the forthcoming facts exemplification to reply the investigation.

4, 14, 6, 9, 21, 3, 7, 10

What is the median of this facts exemplification?

A. There's no median appreciate.

B. 8

C. 7

D. 9.25

 

 

20. What is the dissimilitude betwixt a histogram and a bar chart?

A. A histogram and a bar chart twain ruminate induced facts.

B. A histogram ruminates induced facts, conjuncture the bar chart represents induced facts.

C. The neighboring rectangles in a bar chart enjoy a gap, conjuncture those for a histogram don't.

D. The neighboring rectangles in a histogram enjoy a gap, conjuncture those for a bar chart don't.