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An electrical firm produces light bulbs that have a length of life that is approximately normally distributed with a mean of 650 hours and a population standard deviation of 20 hours. A new version of light bulbs is being produced and is assumed to be better than the previous version. To test this claim, a random sample of 52 new light bulbs are tested. Would you agree with this claim if the random sample showed an average of 760 hours? Use a 0.01 level of significance.
It is claimed that a car is driven on the average less than 28700 kilometers per year with a population standard deviation of 2100 kilometers. To test this claim, a random sample of 58 car owners are asked to keep a record of the kilometers they travelled. Would you agree with this claim if the random sample showed an average of 22500 kilometers? Use a 0.01 level of significance
The average height of students in a freshman class of a certain school has been 161.27 cm with a population standard deviation of 6.5 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 45 students in the present freshman class has an average height of 150.6 cm? Use a 0.05 level of significance.
Compound prepared in lab was found to be 3,4 di-bromo hexane write all the possible structures of it and specify them as R and S. Give stereochemical relationship between all the isomers. Can the isomers of the above compound be separated based upon physical properties?
A tax system is progressive if …
Calculate the volume of 0.400 M H3PO4 needed to react with 200.0 mL of 0.200 M NaOH.
The first principle of economics discussed in Chapter 1 of Mankiw’s book is that
people face trade-offs. Use a production possibilities frontier to illustrate society’s trade-
off between two “goods”—a clean environment and the quantity of industrial output.
What do you suppose determines the shape and position of the frontier? Show what
happens to the frontier if engineers develop a new way of producing electricity that emits
fewer pollutants.
(i)Find the volume of the solid that is generated by revolving the region bound by the
graphs of 𝑦 = 𝑥2 and 𝑦2 = 𝑥 about the 𝑦 − 𝑎𝑥𝑖𝑠.
If 0.650% solution of Na2CO3 will be used to precipitate Ca+² from solution, determine the amount of solution,in grams, needed to precipitate 5.00×10² mL of 0.01120M Ca+²?
Structure of assignment/report: Discuss with the presenter the following aspects: 1. Types of food items processed. 2. Different types of tests conducted (conventional or molecular) in the facility, purposes, and limitations of these methods. 3. How to control infections and prevent them. 4. Infections are usually encountered/tested. 5. Treatments if needed/applicable
#340153 on Dec 2023