9. See photo The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.2 parts per million (ppm). A consumer health group measured the level of the chemical in a random sample of tomatoesobtained from one producer to determine whether the mean level of the chemical in these tomatoes exceeds the recommended limit. Determine the null and alternative hypotheses.O A. Ho: H=0.2 ppmHa: µ20.2 ppmO B. Ho: H=0.2 ppmHa: µ>0.2 ppmO C. Ho: H<0.2 ppmHa: p>0.2 ppmO D. Ho: H>0.2 ppmHa: H= 0.2 ppm

Answered: Image /qna-images/answer/df1b6e1a-9d16-4a5f-91e1-e64fe311d582.jpg

Answered: The maximum acceptable level of a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In experiments to determine the effectiveness of drugs such as anti-fungal ointments that are applied to the skin, the concentration of the drug in a patient’s skin must be measured. The article “Determining Bioequivalence of Topical Dermatological Drug Products by Tape- Stripping” (W. Navidi, A. Hutchinson, et al., Journal of Pharmacokinetics and Pharmacodynamics, 2008:213–220) describes an improved method of measuring that is designed to ensure that all the drug in the skin is recovered. Assume that in an experiment using the old method, the mean amount of drug recovered from a sample of 49 patients was 105 ng with a standard deviation of 20 ng, and that in an experiment using the new method the mean amount of drug recovered in a sample of 35 patients was 117 ng with a standard deviation of 15 ng. Find a 98% confidence interval for the difference in the mean amounts recovered between the two methods.
A nationwide study of undergraduate students reported that the mean number of drinks consumed per week during the spring semester is 7.96. The mean number of drinks consumed per week at USC is 7.64 (s.d.=2.55, N=412 Health services is concerned that USC students are consuming significantly more alcohol per week than the national average. Using an alpha level of .05, Is there sufficient evidence to be concerned? Be sure to select the correct critical value for the alternative hypothesis, and then use this evidence to make your conclusion
State the t critical value that would be used for a 99% interval based on a sample size of 37.
An article reports the following values for soil heat flux of eight plots covered with coal dust. 37.9 37.8 37.9 35.1 35.5 27.5 18.3 24.1 The mean soil heat flux for plots covered only with grass is 29.0. Assuming that the heat-flux distribution is approximately normal, does the data suggest that the coal dust is effective in increasing the mean heat flux over that for grass? Test the appropriate hypotheses using ? = 0.05.State the appropriate hypotheses. H0: ? = 29Ha: ? > 29H0: ? = 29Ha: ? < 29 H0: ? = 29Ha: ? ≠ 29H0: ? ≠ 29Ha: ? = 29 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = State the conclusion in the problem context. Reject the null hypothesis. There is sufficient evidence to conclude that there was an increase in mean heat flux.Do not reject the null hypothesis. There is sufficient evidence to conclude that…
In an Omani factory, a machine that produces "W-product" has been set so that the true average diameter of the "W-product" it produces is 0.602 in. If its diameter is within 0.04 in. of this target value, this is acceptable. Suppose, however, that the setting has changed during the course of production, so that the products have normally distributed diameters with mean value 0.601 in. and standard deviation 0.002 in. What percentage of the "W-product" produced will not be acceptable
Based on a sample of 80 people, the sample mean GPA was 2.77 with a standard deviation of 0.08. The critical value is:
A food delivery company making a large number of deliveries would like to keep their costs down; the manager sets a goal of attaining an average fuel efficiency greater than 26 miles per gallon for all of their deliveries. To check if their goal has been met, a random sample of 42 randomly chosen company deliveries was taken, yielding a mean of 27 mpg.(a) Which hypotheses should be tested in order to determine if their fuel efficiency goal has been met?H0: Ha: (b) The test statistic is 1.5361. What is the p-value? (Use 4 decimals.) (c) Should the company conclude their fuel efficiency goal has been met, for ? = 0.05? (No, Yes) , there is (insufficient, sufficient) evidence to conclude the average fuel efficiency for all of their deliveries is (equal to, greater than) 26 mpg.(d) Suppose the company took a larger sample size.How would this affect the standard error and test statistic?A larger sample size would result in a (smaller, larger) standard error, and a (larger, smaller) test…
A brochure claims that the mean maximum height for a certain type of fern is 0.7 m. A master gardener suspects that this estimate is not accurate locally due to soil conditions. A random sample of 40 mature plants is taken. Using a significance level of 0.10, test the claim that the mean height is less than 0.7m. x¯¯¯=0.65 ms=0.21 mn=40x¯=0.65 ms=0.21 mn=40
A manufacturer producing cocacola drinks wanted to set the specification of production to achieve process capability. He set his Upper Control Limit (UCL) = 0.03, proportion of defective items as 0.02. Calculate the number of sample observations (n) to be used to ensure 99.74 of the value.
Two samples, one of size 20 and the second of size 19, are selected to test the difference between two independent population means. How many degrees of freedom are used to find the critical value? Assume the population standard deviations are unknown but equal. Multiple Choice 39 38 37 20
A random sample of 11 size AA batteries for toys yield a mean of 2.98 hours with standard deviation, 1.19 hours. (a) Find the critical value, t?/2, for a 99% CI. ??/2 = (b) Find the margin of error for a 99% CI.
Calculate the average values of the Cp and Cpk capabil-ity indices for the BOD data , assuming that LSL=5 mg/L and USL=35 mg/L. Do these val-ues of the indices indicate that the process performance is satisfactory?

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