The table gives the coal consumption of a country for selected years. Use the table to answer parts (a) through (f). Year 1950 1960 1970 1980 1990 2000 2010 2012 -> 492.3 397.4 525.7 696.9 905.6 1083.3 1046.5 885.8 Millions of Short Tons (a) Draw a scatterplot, letting t=0 represent 1950. Choose the correct graph below. OA OB. 1200 1200 Q Q C. 1200 Q D. 1200+ (b) Use the quadratic regression feature of a graphing calculator to get a quadratic function that approximates the data. y=0²² +0₁+0 (Round to three decimal places as needed.) 80 Q Q

The table gives the coal consumption of a country for selected years. Use the table to answer parts (a) through (f). Year 1950 1960 1970 1980 1990 2000 2010 2012 -> 492.3 397.4 525.7 696.9 905.6 1083.3 1046.5 885.8 Millions of Short Tons (a) Draw a scatterplot, letting t=0 represent 1950. Choose the correct graph below. OA OB. 1200 1200 Q Q C. 1200 Q D. 1200+ (b) Use the quadratic regression feature of a graphing calculator to get a quadratic function that approximates the data. y=0²² +0₁+0 (Round to three decimal places as needed.) 80 Q Q

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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In a student survey, forty-one part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency Relative Frequency Cumulative Frequency 1 2 3 10 15 0.3659 Search 0.3902 What percent of students take exactly two courses? Frequency Tables Question Help: Written Example Message instructor Submit Question Jump to Answer 25 41 1% B. M W
A biologist exposed a certain type of bacteria to gamma radiation to see how long they would live. He gathered data on the survival time of a number of bacterial cells and organized the data into the histogram below. Use the histogram to construct a frequency table. (The relative frequencies should be in decimal form.) 60+ 50 40 30 10 440 282 Survival Time (in Seconds) 45 124 203 361 519 Survival Time of Bacteria upon Exposure to Gamma Radiation Frequency Survival Time (in Seconds) Relative Frequency 45-124 124-203 203-282 282-361 361-440 440-519 Frequency 20
Recall that a relative frequency histogram is used to graph quantitative data. Classes are chosen to divide the range of values into equal-length subintervals, then plotted along the horizontal axis. A bar is drawn for each class with height equal to the relative frequency for that class. To create a relative frequency histogram, first summarize the following data in a frequency table. 1 N 2 3 4 5 6 7 Class Class Boundaries 8 9 1.3 10 11 14.7 9.0 16.7 4.1 14.9 4.4 2.7 32.3 10.9 9.0 9.0 1.6 18.4 1.0 2.4 2.4 18.0 Since the measurements are all between the values 0 and 33, it will be convenient to choose 11 class intervals of length 3. Using the given data, tally the values within each class interval to determine the frequency of each class, and fill in the following table. 0 to <3 3.5 11.2 18.0 26.7 3.7 3 to 6 6 to 9 9 to 12 12 to < 15 15 to 18 18 to 21 21 to 24 24 to 27 0.2 6.1 13.5 27 to < 30 30 to 33 7.4 8.2 19.2 1 1 2 1 Frequency 10 5 1 4 1 X X 9.4 X 8.7 X 2.0 6.6 3.9 5.9 4.3 3.3 0.2…
Can you answer ONLY 28 G and H thanks i only need G AND H
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The frequency distribution to the right shows the various levels of demand for a particular laptop computer sold by a store during the last 50 business days. Determine the average number of laptops sold per day. Number of Laptops Frquency 0 251 52 63 114 15 2
435 507 448 435 463 440 448 413 432 458 473 465 428 472 439 a. Summarize the data on femur lengths in a frequency table. Use class intervals that start at 400 and have width 20. b. Add a column to your table from part (a) for the relative frequencies. c. Draw a histogram that represents your frequency table. (Use either frequency or relative frequency for the vertical axis.)
Round Round 3 100 MODE. to the nearest tenth place. to the nearest ten-thousandths place. V QUESTION 14 Choose to compare the decimals. -2.6 QUESTION 15 Click Save and Submit to save and submit. Click Save Al
Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…
Finish times (to the nearest hour) for 10 dogsled teams are shown below. Make a frequency table showing class limits, class boundaries, midpoints, frequency, relative frequencies, and cumulative frequencies. Use three classes. (Round your answer for relative frequency to the nearest hundredth and for midpoint to the nearest tenth.) 308 262 310 268 299 249 257 286 239 278
In the frequency distribution below, the first column (class limits) gives the age ranges (in years) of people who participate in a survey. The second column gives the frequency for each age range. a. Determine the class width. If needed, you can use the space below the table. b. Complete the rest of the frequency distribution. For the relative frequency column, round your answers to 2 decimal places. Class Limits Frequency Class Boundaries Class Midpoints Relative Frequency Cumulative Frequency 18-26 16 27-35 24 36-44 38 45-53 34 54-62 26 63-71 12 Total 150