4. In a survey, it was found that 64 families bought milk in the following quantities (litres in a particular week. 19 16 22 22 12 39 19 14 23 24 16 18 7 17 20 25 28 18 10 24 20 21 10 7 18 28 24 20 14 23 25 34 22 5 33 23 26 29 13 36 26 !! 37 30 13 15 22 21 32 21 31 17 16 23 12 9 15 27 17 21 Using Sturges' rule, convert the above data into a frequency distribution by 'Inclusive Method".
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- Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector measures 10 spacers and records the following thicknesses: 0.372" 0.376" 0.379" 0.375" 0.370" 0.373" 0.377" 0.378" 0.371" 0.380" Which spacers are defective (above the maximum limit or below the minimum limit)? All dimensions are in inches.b) The amount of money earned in a day by Ms. Anne's craft shop was recorded and displayed in the stem-and-leaf diagram shown below in Exhibit 1. Exhibit Stem-and-leaf of Data: Amount of Money earned in a day in dollars Leaf Unit = 10 N = 59 234 13 3 55779999 (**) 4 0001233 14 4 5569 *** 03344 7788 1 6. 1 (i) What is the range of the distribution? (ii) What are the values of * ** and ***? N 5b) The amount of money earned in a day by Ms. Anne’s craft shop was recorded and displayedin the stem-and-leaf diagram shown below in Exhibit 1.Exhibit 1Stem-and-leaf of Data: Amount of Money earned in a day indollarsLeaf Unit = 10 N = *2 2 595 3 23413 3 55779999(**) 4 000123314 4 5569*** 5 033445 5 77881 6 1 (iv) Use the stem-and-leaf diagram above to draw a box-and-whisker diagram. (v) Comment on the skewness of the distribution.
- b) The amount of money earned in a day by Ms. Anne’s craft shop was recorded and displayedin the stem-and-leaf diagram shown below in Exhibit 1. Exhibit 1Stem-and-leaf of Data: Amount of Money earned in a day indollarsLeaf Unit = 10 N = *2 2 595 3 23413 3 55779999(**) 4 000123314 4 5569*** 5 033445 5 77881 6 1 (i) What is the range of the distribution? (ii) What are the values of *, ** and ***? (iii) What is the median of the distribution?b) The amount of money earned in a day by Ms. Anne’s craft shop was recorded and displayedin the stem-and-leaf diagram shown below in Exhibit 1.Exhibit 1Stem-and-leaf of Data: Amount of Money earned in a day indollarsLeaf Unit = 10 N = *2 2 595 3 23413 3 55779999(**) 4 000123314 4 5569*** 5 033445 5 77881 6 1(i) What is the range of the distribution? (ii) What are the values of *, ** and ***? (iii) What is the median of the distribution? (iv) Use the stem-and-leaf diagram above to draw a box-and-whisker diagram. (v) Comment on the skewness of the distribution.The data below shows car model and the color of vehicles sold at a Car dealership. Hyundai 20 Honda 11 Toyota 6 15.40 8.648 13.51 Red Black White Total Chi Sq = 1.37 0.22 0.28 15 16.95 22 24.65 57 +0.64 I +1.30 + *** 6 9.51 15 13.84 32 +4.18 + 0.00 + 0.02 +0.10 +0.89 + 0.02 18 14.86 26 21.62 50 +0.04 + +0.75 + DF = **** P-Value = ***** No cells with expected counts less than 5 Daihatsu 8 * 9 8.62 12 12.54 29 +0.75= 10.47 Subaru 5 4.59 7 5.05 5 7.35 17 Carefully define the null and alternative hypotheses of the x2 test underlying the generation of the above table. Total 50 55 185
- The table reports the number of weekly death according to age groups and their total for the past ten weeks. The information is retrieved from: https://covidnow.mohgov.my/cases Count of Weekly Death According to Age Groups Time Weekly Death 17 & below 60 & above 18-59 10 weeks ago 72162 10 247 516 9 weeks ago 8 weeks ago 57788 6 160 442 47017 133 382 7 weeks ago 6 weeks ago 5 weeks ago 4 weeks ago 3 weeks ago 2 weeks ago 1 week ago 39522 3 108 329 38265 1 87 291 34163 79 287 39831 2 74 233 39613 78 235 35121 83 209 34661 2 76 197 QUESTIONS: a. Use a scatter diagram and describe the trend in the TOTAL weekly death due to Covid- 19 for the past ten weeks, focusing on the overall ten weeks and the most recent month. b. Based on the reported number of cases within the most recent month (most recent four weeks), forecast the TOTAL death for next week using an appropriate technique for this data set. Explain why you use this technique to predict the total death for next week? Choose between…b) The amount of money earned in a day by Ms. Anne’s craft shop was recorded and displayed in the stem-and-leaf diagram shown below in Exhibit 1. Exhibit 1 Stem-and-leaf of Data: Amount of Money earned in a day in dollars Leaf Unit = 10 N = * 2 2 59 5 3 234 13 3 55779999 (**) 4 0001233 14 4 5569 *** 5 03344 5 5 7788 1 6 1 Use the stem-and-leaf diagram above to draw a box-and-whisker diagram.. A research report from an independent-measures studystates that there are significant differences betweentreatments, F(2, 36) = 3.45, p < .05.a. How many treatment conditions were compared inthe study?b. What was the total number of participants in thestudy?
- The owner of a cell phone store at Greenhills Shopping Center was nothappy when he learned that the average number of cell phones sold dailywas only 8 mobile phones. He hired a new seller and told him to tally the dailysales for 20 days. The following are the number of cell phones sold for thepast 20 days. 9 9 9 8 99 11 12 12 1610 12 8 11 1718 15 14 17 14Do the collected data present sufficient evidence to indicate that the averagenumber of cell phones sold daily has increased? Use 0.05 level ofsignificance. Assume normality in the population.The data below shows car model and the color of vehicles sold at a Car dealership. Hyundai 20 Honda 11 8.648 Toyota 6 13.51 Subaru 5 4.59 15.40 Red Black White Total Chi Sq = 1.37 0.22 0.28 15 16.95 22 24.65 57 6 9.51 15 13.84 32 + 0.64 + 4.18 + 0.00 18 14.86 26 21.62 50 +0.04 + d) Name two limitations of this test. +0.75 + DF = ****, P-Value = ***** No cells with expected counts less than 5 Daihatsu 8 * + 1.30 + *** + 0.02 + 0.10 +0.89 + 0.02 +0.75= 10.47 ******* 9 8.62 12 12.54 29 7 5.05 a) Carefully define the null and alternative hypotheses of the y2 test underlying the generation of the above table. ****** and ******* 5 7.35 17 Total 50 55 ** b) Fill in the missing values **, c) What is the conclusion of this test at the 5% level of significance? Give reasons for your answer. 185The amount of money earned in a day by Ms. Anne’s craft shop was recorded and displayed in the stem-and-leaf diagram shown below in Exhibit 1. Exhibit 1Stem-and-leaf of Data: Amount of Money earned in a day in dollarsLeaf Unit = 10 N = *2 2 595 3 23413 3 55779999(**) 4 000123314 4 5569*** 5 033445 5 77881 6 1 (1) Use the stem-and-leaf diagram above to draw a box-and-whisker diagram. (2) Comment on the skewness of the distribution.
