2. Volcanologists have measured the hydrogen content (in % of total umber of atoms) of samples of gases collected from the 1970 Moumt Etna volcanic eruptions. Values are given in the following table: 1970 Hydrogen content (%) 38.5 36.0 46.5 35.5 45.5 37.0 36.0 53.0 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 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 you a normal distribution curve?...... and Why?

2. Volcanologists have measured the hydrogen content (in % of total umber of atoms) of samples of gases collected from the 1970 Moumt Etna volcanic eruptions. Values are given in the following table: 1970 Hydrogen content (%) 38.5 36.0 46.5 35.5 45.5 37.0 36.0 53.0 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 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 you a normal distribution curve?...... and Why?

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter5: Exponential And Logarithmic Functions

Section5.5: Exponential And Logarithmic Models

Problem 3ECP: Estimate the age of a newly discovered fossil for which the ratio of carbon-14 to carbon-12 is...

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Estimate the age of a newly discovered fossil for which the ratio of carbon-14 to carbon-12 is R=1/1014.
1. Nine steel specimens were submerged in seawater at various temperatures, and the corrosion rates were measured. The results are presented in the following table: Temperature (°C) 26.6 26 27.4 21.7 14.9 11.3 15 8.7 8.2 Ở Corrosion (mm/yr.) 1.58 1.45 1.13 0.96 0.99 1.05 0.82 0.68 0.59 Construct a scatterplot of corrosion (y) vs. temperature (x). Verify that a linear model is appropriate. b. What is the least-square line (trendline/regression line) for predicting corrosion from temperature? Two steel specimens whose temperatures differ by 10°C are submerged in seawater. By how much would you predict their corrosion rates differ? d. Predict the corrosion rate for steel submerged in seawater at a temperature of 20°C. Construct a table with predicted values from the original dataset. f. Compute the residuals. Which point has the residual with the largest magnitude? g. What is the correlation between temperature and corrosion rate? What is the regression value? What can be said about…
Periodically, the county Water Department tests the drinking water of homeowners for contaminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (g/L) 2.9 0.2 5.1 4.2 5.5 1.2 0.133 0.774 0.214 0.671 0.444 0.234 0.357 0.761 0.176 0.888 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. OSMOSO copper (mg/L) 0.3 1.3 4.9 1.7 (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. OSHSO
USE THE COOROINATES BELOW AND " AREA BY COOROINATES FoemuLA "TO DETEAMINE THE AREA TO THE NEANEST SUARE Fcor ANO DETERMINE THE ACAEAGE TO THE NEAREST THOUSANDTH. YW=5,000.00o XE)= 5,850 coo 2 YA) = 5,000.000 x0=6,05%.130 3. YOS=4,791.302 4 Yas-4,744.30z X6)=5846.351 X() = 6,055.087
Periodically, the county Water Department tests the drinking water of homeowners for contaminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (g/L) copper (mg/L) 2.9 0.2 5.1 4.2 5.5 1.2 0.3 1.3 4.9 1.7 0.133 0.774 0.214 0.671 0.444 0.234 0.357 0.761 0.176 0.888 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. OSASO (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. ≤H≤
Brake wear: For a sample of 9 automobiles, the mileage (in 1000 s of miles) at which the original front brake pads were worn to 11% of their original thickness was measured, as was the mileage at which the original rear brake pads were worn to 11% of their original thickness. The results were as follows: Car Rear Front 1 41.2 32.7 2 35.9 27.6 46.8 35.5 46.3 38.2 38.6 29.2 51.9 43.9 51.3 41.2 46.7 37.6 46.1 38.0 3 4 5 6 7 8 9 Send data to Excel Part: 0 / 2 Part 1 of 2 (a) Construct a 95% confidence interval for the difference in mean lifetime between the front and rear brake pads. Let d represent the mileage of the rear pads minus the mileage of the front ones. Round the answers to two decimal places. A 95% confidence interval for the mean difference in lifetime between front and rear brake pads is kua < Par Part: 1 / 2 of 2 X (b) An automotive engineer claims that the mean lifetime for rear brake pads is more than 10,000 miles more than the mean lifetime for front brake pads. Does the…
For each of the questions 1-4, answer the following (a-h are steps in a Hypothesis Test, see page 376 of your ebook). For steps f and g do both the p-value method and the critical value method: a) Claim in English: b) Claim in Symbolic Form: c) Null and Alternate Hypothesis: d) Significance Level: e) Test Statistic: f) Find Values: g) Make a Decision: h) Restate the Decision in Nontechnical Terms: i) If this is a statistically significant result, is it also a practically significant result?
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The number of years N(r) since two independently evolving languages split off from a common ancestral language is approximated by N(r) = – 4000 lIn r where r is the proportion of the words from the ancestral language that are common to both languages now. a. N(0.9) = (Round to the nearest tens place.) %3D b. N(0.4) = (Round to the nearest hundreds place.) c. N(0.1) = (Round to the nearest thousands place.) d. How many years have elapsed since the split if 60% of the words of the ancestral language are common to both languages today? years have elapsed since the split. (Round to the nearest hundreds place.) e. If two languages split off from a common ancestral language about 2000 years ago, find r. r = (Round to the nearest tenth as needed.)
- One method for determining the %w/w Na2CO3 in soda ash is an acid base titration. When analysts analyze the same sample of soda ash they obtain the results 86.82, 87.04, 86.93, 86.20, 87.00, 87.01, 85.50, 87.32, 86.82. Treat results by calculation all statistical values at t=1.86
Refer to the table to the right summarizing measured amounts of serum cotinine (ng/mL) from a sample of smokers. When nicotine is absorbed by the body, cotinine is produced. How many subjects are included in the summary? Is it possible to identify the exact values of all of the original cotinine measurements? Cotinine (ng/mL) 0-99 100-199 200-299 300-399 400-499 How many subjects are included in the summary? (Type a whole number.) Is it possible to identify the exact values of all of the original cotinine measurements? Frequency 10 14 15 3 2 OA. Yes. The exact data values are equally spaced numbers between the limits of each class. The number of equally spaced numbers is determined by the frequency in each class. OB. No. A frequency table only shows percentages of the sample in each category. OC. No. A frequency table only shows frequencies of data values in each category. OD. Yes. The data values are the frequencies shown in the table.
4. A tank is discharging water through an orifice at a depth (x) meter below the surface of water whose area (A) m². The following are the values of the corresponding values of (A)? A 1.257 1.39 1.52 1.65 1.809 1.962 2.123 2.295 2.462 2.650 2.827 1.5 1.65 1.8 1.95 2.10 2.25 2.40 2.55 2.70 2.85 3.00 Using the formula: 3 (0.018) T = A dx %3D 1.5 Calculate (T) the time in second for the level of water to drop from (3.0 m) to (1.5 m) above the orifice?