The elements that compose seawater, along with the corresponding percents, are shown in the table. Seawater Elements Percent 85.84% Chemical Охудen Hydrogen Chlorine Sodium Magnesium Other elements If a sample of seawater contains 70 ml, how many ml of hydrogen are in the sample? 10.82% 1.94% 1.08% 0.13% 0.19% ... There are ml of hydrogen in the sample. (Type an integer or a decimal rounded to two decimal places.)

A particular dam contains approximately 1,200,000,000,000 cubic feet of water. For a week-long spike flood, water was released at a rate of 25,700 cubic feet per second. a. How much water was released during the flood? b. What percentage of the dam was released during the flood? a. The amount of water released during the week-long flood was (Simplify your answer.) GOOD b.% of the dam was released during the flood. (Type an integer or decimal rounded to the nearest hundredth as needed.)

Statistics Question

Which region has the largest population in this sample? What proportion live in that region? Which region/province has the least people? What is the percentage? How many in the sample were from the Prairies?

Solve the problem. At the Jumping Jack cookie factory, quality assurance inspectors remove broken or otherwise defective cookies from a moving conveyor belt prior to packaging. Based on past studies, the plant manager knows that the inspectors eliminate 98% of the defective cookies at a conveyor belt speed of 9 feet per minute. As the belt speed increases, the factory can produce more cookies per hour, but at the cost of lower quality of the packaged product. Inspectors collect only 60% of defective cookies at a belt speed of 18 feet per minute. QA Inspector Efficiency Inspector efficiency, % defective cookies eliminated 100 90 60 |(9.98) 50- 10 11 12 13 14 15 Belt speed, feet per minute (18,60) 16 17 18 a. Find an equation of the line through the given points. Write the equation in slope-intercept form. Round the slope and y-intercept each to 1 decimal place. b. Use the equation from part (b) to predict the efficiency of the inspectors at a belt speed of 15 feet per minute. Round to…

2

6. Setup: JP was curious about the sodium content of organic cornflakes. To investigate this, twenty 300-gram boxes of organic cornflakes were obtained and the sodium content was measured. The data (in milligrams) are as follows: 131.1, 130.7, 130.9, 129.5, 129.6, 128.8, 130.7, 128.3, 128.2, 129.7, 130.1, 129.3, 128.7, 129.0, 129.4, 130.4, 129.5, 130.1, 129.8, 130.0 Task: Perform a hypothesis test using R to determine if you can support a claim that the mean sodium content of this brand of cornflakes differs from 130 milligrams? Use a = 0.08 to make your decision. R Output: Upon running your analysis in R, you obtain the following results: One Sample t-test data: corn = 0.1121 t = -1.6659, df = alternative hypothesis: true mean is not equal to 130 19, р-value 92 percent confidence interval: 129.3458 130.0342 sample estimates: mean of x 129.69 Questions: (a) State the hypotheses used in performing this test. (b) Using the output above, state the decision (Reject or Not Reject Ho) of the…

Impure cans: A manufacturer of aluminum cans measured the level of impurities in 24 cans. The amounts of impurities, in percent, were as follows. 2.1 1.5 1.3 1.0 2.8 8.2 1.9 1.3 3.2 4.4 9.5 3.8 2.7 4.9 2.1 1.8 8.0 4.5 2.5 1.6 1.9 1.5 2.8 1.6 Construct a boxplot for this sample. Is it reasonable to treat the sample as coming from an approximately normal population? Explain.

220 people are asked how many siblings they have? # of Siblings Frequency Relative Frequency Cumulative Frequency 0   0.2455 54 1 37   91 2 44 0.2   3 45 0.2045 180 4 40 0.1818 220 a. Complete the table (Use 4 decimal places when applicable) b.  What percent of the people have exactly one sibling? %

What percentage of bookcases in the example are large? Large constitute: ______ %