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# I need the answers froM number 1-25 PLEASE 1. The following are...

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1. The following are descriptive statistics EXCEPT A. The chances of you getting a new car is about the same as passing your math class. B. Based from a study, smoking increases the risk of lung cancer. C. A recent survey of 2000 adults having an MBA reported that the average salary is more than \$65,000 a year. D. Last year's attendance at Ateneo's basketball game was 883, 452. 2. It refers to an attribute or characteristic of a population. A. Statistic B. Parameter C. Data D. Sample 3. Why do we use inferential statistics? A. Inferential statistics are used to help us to generalize from the sample to the whole population. B. Inferential statistics are used to help us to show the difference between the sample and the whole population. C. Inferential statistics are used to help us to compare the sample to the whole population. D. Inferential statistics is used to describe the sample. 4. Which of the following plots is most useful for detecting outlying scores? A. Stem and leaf plot B. Box and whisker plot C. Scatter plot diagram D. Histogram

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5. Children in elementary school are evaluated and classified as non-readers (0), beginning readers (1), grade level readers (2), or advanced readers (3). The classification is done in order to place them in reading groups. Which level of measurement is being used in the given scenario? A. Nominal B. Ordinal C. Interval D. Ratio 6. A national random sample of 20 NSAT scores from 2018 is listed below. Calculate the sample mean and standard deviation: 23 23 25 17 22 17 19 29 26 13 12 26 30 30 18 14 12 26 17 18 A. Mean = 20.50; SD = 5.79 B. Mean = 20.50; SD = 5.94 C. Mean = 20.85; SD = 5.79 D. Mean = 20.85; SD = 5.94 7. If the mean is 8, then the mean absolute deviation of the scores 10 9 3 8 10 is A. 1 B. 2 C. 3 D. 5 8. The teacher records the percentage that each student got correct on the last math test. Which level of measurement is being used in the given scenario? A. Nominal B. Ordinal C. Interval D. Ratio 9. In statistics, which of the following is a qualitative variable? A. Salt water freezes at 28.4 degrees Fahrenheit. B. The roller coaster ride is 1 minute, 48 seconds long. C. Your student ID is a 7-digit number. D. My little sister is 5-1/2 years old. 10. Assume that the monthly incomes for 10 people are as follows. P3,400 P2,800 P3, 100 P2,900 P3,000 P3,700 P 4,500 P4, 100 P 5,100 P 12,000 The median for the distribution set is A. P3,400 B. P3,650 C. P3,550 D. P3,700

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11. The names of 70 contestants are written on 70 cards. The cards are placed in a bag and three names are picked from the bag. What sampling method was used? A. Stratified sampling B. Simple random sampling C. Non-probability sampling D. Cluster sampling For numbers 12-13, please refer to the following problem: The following data consist of the present school enrollment of the Dr. Vesse High School. A study on the recent teaching strategies will be conducted in this school. Fourth Year Level First Second Third Population Size 150 185 220 245 12. How many samples should the researcher take if she will use 1% margin of error? A. 8 B. 741 C. 751 D. 761 13. Using stratified random sampling, if 200 will be taken as sample, how many representatives from the first year should be drawn? A. 30 B. 38 C. 76 D. 100 14. The scores of Psychology students in their GMath quiz are presented in stem-and-leaf plot/diagram: 03 C N 224 12333 a lonipho enl to noitomolamont 4 11233356 5 3356 6 24 7 3 Find the midrange and sample variance, A. Midrange = 63; Var = 15.65 B. Midrange = 41.5; Var = 15.34 C. Midrange = 41.5; Var = 245.01 D. Midrange = 63; Var = 235.21

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15. A student's grade in a GMATH course is comprised of exam (40%), quizzes (20%) problem set (20%), and a final project (20%). His scores for each of the categories are 85 (exam), 100 (quizzes), 92 (problem set) and 84 (final project). Calculate his overall grade. A. 90.25 B. 88.2 C. 89.2 D. 86.7 16. The measure of dispersion that is influenced most by extreme values is A. the variance B. the standard deviation C. the range D. the interquartile range For numbers 17-19, please refer to the following: The test scores of 19 students are listed below 36 45 49 53 55 56 59 61 62 65 67 72 77 80 81 85 91 94 96 17. Find the 34th percentile. Interpret the result. A. 59; 59% of the scores falls below 34 B. 61; 34% of the scores falls below 61 C. 59; 34% of the scores falls below 59 D. 61; 61% of the scores falls below 34 18. Find the 7th decile. Interpret the result. A. 77; 7% of the scores falls below 77 B. 80; 7% of the scores falls below 80 C. 80; 70% of the scores falls below 80 D. 77; 70% of the scores falls below 77 19. Find the interquartile range. A. 24 B. 25 C. 26 D. 27 the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in a , recording, or otherwise of any part of this document witho

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IM 'OZ For numbers 20-25, please refer to the following problem: An important application of regression analysis is in the estimation of cost. By collecting data on volume and cost and using the least squares method to develop an estimated regression equation relating volume and cost, one can estimate the cost associated with a particular manufacturing volume. Consider the following sample of monthly production volumes and total costs data for a manufacturing operation for the year 2018. Month Production Volume (units) Total Costs (\$) January 2018 500 6,000 February 2018 350 4,000 March 2018 450 5,000 April 2018 550 5,400 May 2018 600 5,900 June 2018 400 4,000 July 2018 400 4,200 August 2018 350 3,900 September 2018 400 4,300 October 2018 600 6,000 November 2018 700 6,400 December 2018 750 7,000 20. Which of the following is NOT necessarily true about the interpretation of the value of b in the simple linear regression equation y = a + bx for this problem? 1. The monthly total costs will increase by \$7.6437 for every one-unit increase in the 11. production volume. Since b &gt; 0, there is a direct relationship between production volume and total costs. III. Because b &gt; 1, there is a very strong positive linear relationship between production volume and total costs. A. i and ii only B. ii only vino it boo i C. iii only D. ii and ili only vino lili bao lil bro did live use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any ing, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited.

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21. Which of the following statements are true about the dependent (or response) and independent (or predictor) variables for the simple linear model in this problem? 1. 11. Production volume is dependent on total costs. The predictor and response variables are the production volume and total costs, respectively. The total costs can be projected using the simple linear regression equation if the production volume is known. A. i and ii only B. i and iii only C. li and iii only D. i, ii, and ili 22. Calculate the (Pearson) correlation coefficient between production volume and total costs in this problem. A. 0.8391 B. 0.9571 C. 0.9160 D. 0.9783 23. Which of the following is the most suitable interpretation of the (Pearson) correlation coefficient between production volume and total costs in this problem? A. There is a perfect positive correlation between production volume and total costs. B. There is a very strong positive correlation between production volume and total costs. C. There is a strong positive correlation between production volume and total costs. D. There is a positive correlation between production volume and total costs. 24. The equation of the regression line is given by A. y = -116.01 + 0.12x B. y = 1321.32 - 7.64x C. y = 116.01 + 0.12x D. y = 7.64x + 1321.32 25. How much is the estimated total costs if the corresponding production volume for a particular month is 300 units? A. \$274.80 B. \$287.13 C. \$2,293.11 lol ent to rial D. \$3,614.43 ad for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any hanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited. 49

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