The molecular weight of a particular polymer should fall between 750 and 1,035. Thirty samples of this material were analyzed with the results X-bar = 902 and s = 90. Assume that molecular weight is normally distributed.
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- If P(AUB)=0.7, P(AUB')=0.9 what is P(A)?In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states: Nickel Charge Proportions Found 0 0.17 +2 0.34 +3 0.33 +4 0.5-0.34 Determine the mean of the nickel charge. Please enter the answer to 2 decimal places.A group of laboratory mice were massed and the results are as follows: 504 g, 340 g, 450 g, 499 g, 201 g, 550 g, 525 g and 505 g. After removing the 550 g mouse from the study, what is the change in the average of the mass of the mice? O Average went up by 15g O Average went up by 50g O Average went down by 50g O Average went down by 15g 77°F Rip Current ype here to search Del F12 Prt Sc Insert F10 F11 F9 F8 F6 F7 F5 F4 Backspace & % @ #3 7 8 9 5 6 4
- QUESTION 2 The molecular weight of a particular polymer should fall between 167 and 479. Fourty samples of this material were analyzed with the results X-bar = 271 ands = 65. Assume that molecular weight is normally distributed. Attach File Browse Local Files Browse Content CollectionThe shelf life of a particular dairy product is normally distributed with a μ of 12 days and a σ of 3 days. What percent of the products last 15 or more days?A sample of ore is found to be 0.0022% gold and 0.059% silver. What is the percentage of matter in the ore that is neither gold or silver?
- In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states: Nickel Charge Proportions Found 0 0.17 +2 0.33 +3 0.33 +4 0.5-0.33 Determine the variance of the nickel charge. Please enter the answer to 3 decimal places.6 8. 7. 6. 5. ) & «Previous O D. 704.3 rpm OC. 901.5 rpm O B. 450.7 rpm O A. 7.5 rpm puo Each tire of an automobile has a radius of 1.25 feet. How many revolutions per minute (rpm) does a tire make when the automobile is traveling at a speed of 59 feet per %24If SSY is 25.5 and SSY' is 18.3, what is SSE?
- The hemoglobin count (HC) in grams per 100 milliliters of whole blood is approximately normally distributed with population mean 14 for healthy adult women. Suppose a female patient has had 16 laboratory blood tests during the past year. Her average HC is 16.94 with s = 1.05. Is %3D there evidence that her average HC is not 14? (a) State the null and alternative hypotheses: (Type "mu" for the symbol u, e.g. mu >1 for the mean is greater than 1, mu <1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1) Ho : На (b) Find the test statistic (give to at least 3 decimal places), t ="From the following data find out the missing frequencies : (AB) = 100 , (A) = 300 , (N) = 1,000 , (B) = 600 %3DStaff members of an oil refinery believe that the octane reading of a particular petrol depends on one of its raw materials. A sample of the related raw material (x) and octane number (y) was collected and the measurements below were found. E-1 X = 401.90 E-1 x;? = 23,126,35 El-1 yi = 644.00 El-1y? = 59,254.08 El-1 Xi Yi = 36,966.83 i) Estimate and interpret a fitted linear regression model for the data collected. ii) Test the hypotheses Ho : B1 = 0 versus H : B1 # 0 at a 10% level of significance. Include a p-value in your test. ii) Construct a 90% confidence interval for the estimated intercept of the linear regression model. iv) Conduct an F test at a = 0.10, to determine whether the regression model obtained in (i) is significant. v) Calculate and interpret the coefficient of determination, R². Using this value, determine whether the regression model adequate. vi) Suppose that another regression model was constructed from a similar data set where its adjusted R2 was found to be R2…
