5. Create a cumulative frequency curve and describe its shape. 100% 75% 50% 25% 0% 157.5 162.5 167.5 172.5 177.5 182.5 Heights S-shaped curve. typical of a normal distribution 6. Use the ogive to estimate the median and quartiles. 1st quartile: Q1 about 167cm Median: about 170 cm 3rd quartile: Q3 About 174cm Estimated from the graph. 7. What is the inter-quartile range? Inter-quartile range: IQR=Q3-Q1=174-166=7cm 2015/6/2 !2 GAC010 AE2 Louis ID 8. Box plot 160 165 170 175
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eaten out during weekdays are as follows: Monday Tuesday Wednesday Thursday Friday Spent(RM) 6.19 5.69 5.95 7.66 14.53 1 a) Calculate the mean (2 marks) b) Calculate the median (2 marks) c) If on Saturday she spent RM8‚ what is the median for these six days? (2 marks) d) Make a sketch of the data‚ showing the mean and median values. Comment on it. (4 marks) 5) Differentiate between discrete random variable and continuous random variable. Give an example for each of this category. (6 marks) 6)
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order to find whether Eagle boys has real-size 12 –inch pizza we have used we have used one variable summary (to see mean and median of Eagle boys pizzas) and Histogram to find out how many Eagle boys pizzas are greater than 12 inch. Inches (Dominos) Inches (EagleBoys) One Variable Summary Data Set #1 Data Set #1 Mean 10.8040 11.4860 Std. Dev. 0.4603 0.2466 Median 10.6024 11.4488 Minimum 10.0433 10.4646 Maximum 11.6772 12.2283
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graphical plot and the positive skewness (0.87) measure‚ the data is skewed towards right. Also‚ the outliers present towards the right end indicate the presence of few extremely high valued houses‚ due to which average price of houses is higher than the median price. The highest density of data is present in two lower quartiles‚ as can be seen from box plot. This shows that low valued houses are present in bulk‚ and thus must available in the market easily. | | Question 2: Though normal distribution
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2 du dv v −u u y = ‚ dx = dx 2 dx ‚ v dy v dy dy du = × dx du dx 10 5 1 2N−F M = L+ C fm Section A 1 Answer all questions The mean of x+ 3‚ 2x – 5‚ x + 7‚ x and 3x + 7‚ is 12 . Find (a) the value of x (b) median [ 4 marks ] Answer : (a) ……………………… (b) ……………………… 2. A set of examination marks a1 ‚ a2‚ a 3‚ a 4‚ a5‚ a6‚ has a mean of 5 and standard deviation of 1.5 Find (i) the sum of the marks‚ ∑ a ‚ (ii) the sum of the squares of the marks‚ ∑a 2
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CONTENT 1.0 QUESTION 1 Q1 (a) Construct a cumulative frequency distribution Q1 (b) Draw Cumulative Frequency Polygon Q1 (c ) Q1 (d ) 2.0 QUESTION 2 Q2 (a ) Type of variable Q2 (b) Histogram Q2 (c ) Q2 (d) Q2 (e ) mean ‚ mode ‚ median Question 1 a ) Construct a cumulative frequency distribution Number of Cars | Frequency | Upper Boundary | Cumulative frequency | 15-19 | 9 | ≤19.5 | 9 | 20-24 | 8 | ≤24.5 | 17 | 25-29 | 4 | ≤29.5 | 21 | 30-34 | 4 | ≤34.5 | 25
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Basics of Statistics Jarkko Isotalo 30 20 10 Std. Dev = 486.32 Mean = 3553.8 N = 120.00 0 2400.0 2800.0 2600.0 3200.0 3000.0 3600.0 3400.0 4000.0 3800.0 4400.0 4200.0 4800.0 4600.0 5000.0 Birthweights of children during years 1965-69 Time to Accelerate from 0 to 60 mph (sec) 30 20 10 0 0 Horsepower 100 200 300 1 Preface These lecture notes have been used at Basics of Statistics course held in University
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AP Statistics Quarter 1 Final (Chapters 1-5) Chapter 1 Sections 1.1 and 1.2 I. Observation vs. Experiment A. Observational study: Record data on individuals without attempting to influence the responses. We typically cannot prove anything this way. B. Experimental study: Deliberately impose a treatment on individuals and record their responses. Influential factors can be controlled. C. Confounding 1. Two variables (explanatory variables or lurking variables) are confounded when their effects
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NAME: ANSWER KEY Econometrics First Test‚ Queens College‚ I. R. Kelly Thursday‚ September 27th‚ 2012‚ 9:25-10:40am Please put all answers on the question sheet. You have one hour and fifteen minutes to finish the test. Best of luck. 1. (6 points) How does a panel data set differ from a regular pooled data set? Give a specific example. A pooled data set is one that combines both time series and cross-sectional data; in other words‚ there are many cross-sectional units over a period of time
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F-2‚Block‚ Amity Campus Sec-125‚ Nodia (UP) India 201303 ASSIGNMENTS PROGRAM: SEMESTER-I Subject Name : Study COUNTRY : Permanent Enrollment Number (PEN) : Roll Number : Student Name : INSTRUCTIONS a) Students are required to submit all three assignment sets. ASSIGNMENT DETAILS MARKS Assignment A Five Subjective
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