Total 200 Answer the following: 1. What are the lower and upper limits of the first class? 2. What are the lower and upper boundaries of the first class? 3. The class interval used is the same to all classes of the distribution. What is the interval size?
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- Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum n=1 1000 0 101.99 3.37 106.56 0.11 27.59 67.75 142.05 843.53 n=5 1000 0 100.10 1.40 44.42 14.48 66.11 94.30 123.91 274.72 n=10 1000 0 100.01 0.986 31.19 20.31 77.33 98.98 118.91 240.10 n=30 1000 0 100.29 0.571 18.07 53.27 87.52 98.84 112.38 168.62 n=100 1000 0 100.34 0.324 10.24 68.75 93.62 100.11 106.21 136.17 a) Describe in words, ∑X in context of the problem. Then state the distribution b) Calculate the interval for the middle 65% for the total amount of time spent on homework among the 144 students. Show calculator commands. Display units (Round to 3 d.p.) c) Calculate the probability that the total amount of time spent on homework among the 144 students is more than 14,300 minutes. Show calculator commands.1. An automobile manufacturing company wanted to investigate how the price of one of it's car models depreciates with age. The research department at the company took a sample of 8 cars of this model and collected the following information on the ages (x, in years) and prices (y, in hundreds of pesos) of these cars as shown: Age, x83792546 Price, y18955524140403899 Find the estimated price of a 15 year old carThe target fill weight for a box of cereal is 350 g. Each day a sample of 300 boxes is taken, and the number that are underweight is counted. The number of underweight boxes for each of the last 25 days is as follows: 23121919201921272623262225 303022252729353943413929 a) Compute the upper and lower 3σ limits for a p chart. b) Is the process in control? If not, when is it first detected to be out of control?
- A horticulture student is interested on the antifungal properties of three plant species. Leaf extracts from each species were mixed with agar based growth medium and poured into 5 Petri dishes. The Petri dishes were streaked with fungi isolates and the area in sq mm of fungal growth was measured after seven days. Assuming the areas of growth are not normally distributed, which is the most appropriate analysis for the experiment to find difference? A. Kruskal Wallis B. Friedman C. t-test D. sign testTbe following data represent the results obtained from tbe specific gravity (S.G.) test performed in a soil laboraton ' including many sand santpla. lr the flflli class occurs with greatest frequency and the mode is equal to (2.9793) . Find tile value ofX.I need help with part C please!!! I got 0.9691 and it was wrong. A manufacturer produces lots of a canned food product. Let p denote the proportion of the lots that do not meet the product quality specifications. An n = 33, c = 0 acceptance sampling plan will be used. (a) Compute points on the operating characteristic curve when p = 0.01, 0.03, 0.10, and 0.20. (Round your answers to four decimal places.) c p = 0.01 p = 0.03 p = 0.10 p = 0.20 0 0.7177 0.3660 0.0309 0.0006 (b) Plot the operating characteristic curve. -A graph has a single curve on it. The horizontal axis is labeled Percent Defective in the Lot and ranges from 0 to 22. The vertical axis is labeled Probability of Accepting the Lot and ranges from 0.00 to 1.00. The curve starts at (0, 1.00) and goes down and to the right approximately through the points (1, 0.92), (3, 0.78), (10, 0.43), and (20, 0.18). -A graph has a single curve on it. The horizontal axis is labeled Percent Defective in…
- The data in the contingency table to the right count the number of male and female shoppers who accept or reject a discounted offer in return for supplying a retailer with an email address. Consider using these data to test the null hypothesis that gender and acceptance are independent (H0). Male Female Accept 105 95 Reject 95 105 (c) Find the value of x2(chi-square) for testing H0. The value of x2 (chi-square)for testing H0 is _____. (Round to three decimal places as needed.) (d) Find the p-value for testing H 0. (Round to three decimal places as needed.)In independent samples t-tests, power is a function not only of N, but also of how close to equal the ns are in each group. Compute a table showing the power for effect sizes of 0.4, 0.6, and 0.8 when the ns for the two groups are: 10 and 50, 20 and 40, and 30 and 30. Which of the three effect sizes is most affected by the N not being equal? Why?6) An aircraft firm is considering three different alloys for use in the wing construction of a new airplane. Each alloy can be produced in four different thicknesses (1 = thinnest, 4 = thickest). Two test samples are constructed for each combination of alloy type and thickness, then each of the 24 test samples is subjected to a laboratory device the severely flexes it until failure occurs. For each test sample the number of flexes before failure is recorded, with the data shown below. a) Use JMP to fit a two-way ANOVA to the data. Using a = 0.05 draw conclusions for the ANOVA. Make sure you state your conclusion in the context of the problem. b) Does there appear to be a need to include the alloy type / thickness interaction term? c) Use JMP to fit a two-way ANOVA with interaction to the data. Using a = 0.05 draw conclusions for the ANOVA. Make sure you state your conclusion in the context of the problem. Alloy Thickness Flexes Alloy A Thickness 1 804 Alloy A Thickness…
- Researchers investigated how the size of a drinking glass affects how much soda people tend to pour themselves. People were randomly given either a 17 oz or a 25 oz glass, and were invited to pour as much soda as they liked. Did the glass size change the selected portion size? The summaries are shown to the right. Assume any assumptions and conditions are satisfied. Use α=0.05. n ybar sSmall Glass 29 5.33 1.79Large Glass 22 6.67 2.87 Find the T-value and the P-value30-35. A study is being conducted to determine whether there is a relationship between jogging and blood pressure. A random sample of 210 subjects is selected, and they are classified as shown in the table. At α = 0.05, test the claim. 30. What is the appropriate statistical tool to be used in order to test the claim? a) z-test b) wilcoxon rank sum test c) chi-square test d) ANOVA 31. The degrees of freedom in the given problem. a) 1 b) 2 c) 3 d) 4 32. What is the critical value to be used in the given problem? a) 5.991 b) 7.815 c) 10.597 d) 15.202 33. What is the chi-square test value? a) 9.186 b) 0.892 c) 2.394 d) 4.756 34. If we will continue the process of hypothesis testing, which of the following is true? a) test value > critical value, then the decision is to not reject the null hypothesis. b) test value > critical value, then the decision is to reject the null hypothesis. c) test value < critical value, then the decision is to not reject the null hypothesis. d)…