3. The data from 200 endothermic reactions involving sodium Final Temperature Conditions Number of bicarbonate are summarized as follows: Reactions Detemine the cumulative distribution function for X. 266 K 48 271 K 60 274 K 92
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- (a)The following table shows the amount of melted plastic (in grams) at various temperatures of the plastic (in Celsius). Temperature (Celcius) 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Melted Plastic (in grams) 8.1 7.8 8.5 9.8 9.5 8.9 8.6 10.2 9.3 9.2 10.5 (I)Find the linear regression equation of the amount of melted plastic temperature. (ii)Estimate the amount of melted plastic at temperature 1.75 Celcius. (iii)Calculate the coefficient of correlation and comment on the relationship between temperature and amount of melted plastic. (iv)Calculate the Spearman’s rank correlation coefficient for the above data. (b)A random sample of twelve students were chosen, and their midterm test score ( y), assignment score (x1), and missed classes (x2) were…Textbook prices have a seasonal structure on Ebay. At the end of a term, the supply of used books outstrips demand, and the price is lower. Near the start of a term, many students are looking for books, and the price is higher. Suppose we can classify sales for a particular chemistry textbook into these two time periods and an "other" time period in the proportions shown below. We have also listed the average price the textbook sells for in each of these three time periods Start of Term End of Term Other Sales Proportion Average Price 0.43 0.31 0.26 97.97 49.93 73.83 For example, about 45% of Ebay auctions for this chemistry textbook occur at the start of the term and the books sell for an average of $82.52 during this time. Using the information above, compute the average price of the textbook over all seasons. (Do not put a dollar sign in your answer). Round your answer to two decimals. Average Price over all seasons = $ch 10
- 1. The years of experience X for the 250 employees of Vandermerer Construction were distributed as follows: years | relative frequency 50%0-5 | 50%5-10 | 30%10-15 | 20% The median experience (in years) is approximately a. 7.5 b. 5.0c. 2.5 d. 6.02. Volcanologists have measured the hydrogen content (in % of total number of atoms) of samples of gases collected from the 1970 Moumt Etna volcanic eruptions. Values are given in the following table: 1970 Hydrogen content (%) 35.8 44.5 35.5 32.0 52.0 39.0 37.0 47.0 42.0 57.0 42.5 54.5 35.0 592.5 43.5 48.0 45.0 44.6 38.5 53.0 55.0 40.0 37.5 57.7 38.5 36.0 46.5 35.5 45.5 37.0 36.0 33.0 Enter the data in Excel. Now find out the following information. Median for 1970 Hydrogen content Mode for 1970 Hydrogen content SEM for 1970 Hydrogen content Standard deviation for 1970 Hydrogen content 99% Lower confidence limit 1970 Hydrogen content 99 Upper confidence limit 1970 Hydrogen content Do you things this sample of data give vou a normal distribution curve? and Why? الترکبر ENG )The following data was reported on total Fe for four types of iron formation (1 carbonate, 2 silicate, 3 magnetite, 4 hematite). 1: 21.0 28.1 27.8 27.0 27,8 25.2 25.3 27.1 20.5 31.5 2: 26.2 24.0 26.2 20.2 23.6 34.0 17.1 26.8 23.7 25.0 3: 29.6 34.0 27.5 29.4 26.4 26.2 29.9 29.5 30.0 35.5 4: 37.1 44,2 34.1 30.3 31.8 33.134.1 32.9 36,3 25.3 A USE SALT Carry out an analysis of variance F test at significance level 0.01. State the appropriate hypotheses. H at least two 's are equal Ho Hi= Ha = H4 H at least two 's are unequal O Ho = = 4 H al four s are unequal H all four 's are equal
- People living in a town are grouped according to their age into five groups. The number of persons lived during a calendar year and the number of deaths recorded during the same period are as follows: Age Group (in years) 0-10 10-30 30-50 50-70 70 and above No. of Persons 5,000 10,000 15,000 10,000 2,000 No. of Deaths 125 30 30 200 1,000 Calculate crude death rate of the town.(b) If 500 consumers were surveyed, give the frequency distribution for these data. Frequency Distribution Table Product Frequency X Y (d) If we wish to depict these data using a pie chart, find how many degrees (out of 360) should be assigned to each of products W, X, Y, and Z. (Round your answers to 1 decimal place.) Product Degrees Y1-What these statistics tell you about the kurtosis of the variables:
