Lab: Sampling Bacteria Purpose: Refer to handout sheet. Materials: Refer to handout sheet. Procedure: Refer to handout sheet. Pre-Lab Questions: 1. Why is one dish being reserved for the class as a "control"? Having a controlled variable is important in order to be able to look at what the bacteria would look like if it hadn’t been contaminated and just left as agar. Having a sample of agar that wasnt exposed to any bacteria will provide a clear picutre of what grew on the agar
Premium Bacteria Petri dish Agar plate
[pic] Further Details: Steve McClure Tel: - +441376 536838 / +447703519426 ----------------------- HS&E bulletin 07/2004 Recently‚ a serious incident occurred following the sampling of an LPG vessel. The inspector obtained hydrocarbon liquefied gas samples using two gas sample cylinders‚ commonly called ‘gas bombs’. These cylinders were delivered to a client’s laboratory for testing but the correct procedure for delivering
Premium Natural gas
purpose of this memo is to describe the sampling process and illustrate how sampling can be used during an audit. This memo will begin by defining what sampling is‚ when it should be used‚ and the risks associated with it. The memo will then continue to describe the basic steps involved with sampling‚ define terms within those steps‚ and describe the use of sampling in the audit by identifying two situations in which sampling is used in an audit. Sampling is the objective of which is to make a statement
Premium Scientific method Sampling Sample size
Situation: An opinion poll was done by a TV station through the phoned-in answers to a Yes or no question. What type of Sampling is this???? Answer:Convenience Sampling. Daniella: One day‚ a TV show in the Philippines is having an opinion poll about the effectiveness and use of herbal medicine nowadays through phoned-in answers. Nellen: Now we will be calling some of our televiewers‚ so better hold on to your phones. All you go to do is to answer our question‚ and *tantanaran* Our question
Premium Answer Medicine Bless you
Please write down four factors which affect sampling error and for each factor‚ write down the effect of sampling error (i.e.‚ if a factor is up‚ then what happens to the sampling error) 8. Please write down four factors to decide sample size and for each factor‚ write down the effect of sample size (i.e.‚ if a factor is up‚ then what happens to the sample size) 9. Please write down when the systematic sampling is better than simple random sampling. 10. Please write down why we do
Free Sampling Sample size Stratified sampling
11 (i) SAMPLE DESIGN AND SAMPLING PROCESS Introduction Samples are parts or potions of population. A population is the specified total of study elements. A target population‚ also known as the universe‚ includes all the members of a real or hypothetical set of people‚ event or objects to which we wish to generalize the results of our research. A study population is that aggregation of elements from which the sample is actually selected. Sampling means selecting a given number
Free Sampling
Probability Concepts 1. Fundamental Concepts of Probability 2. Mutually Exclusive and Collectively Exhaustive 3. Statistically Independent and Dependent Events 4. Bayes’Theorem Learning Objectives • Understand the basic foundations of probability analysis • Learn the probability rules for conditional probability and joint probability • Use Bayes’ theorem to establish posterior probabilities Reference: Text Chapter 2 Introduction • Life is uncertain; we are note sure what the
Premium Conditional probability Probability theory
Chapter 1 The Probability in Everyday Life In This Chapter Recognizing the prevalence and impact of probability in your everyday life Taking different approaches to finding probabilities Steering clear of common probability misconceptions You’ve heard it‚ thought it‚ and said it before: “What are the odds of that happening?” Someone wins the lottery not once‚ but twice. You accidentally run into a friend you haven’t seen since high school during a vacation in Florida. A cop pulls you over the
Premium Probability theory Flipism
A group of investors wants to develop a chain of fast-food restaurants. In determining potential costs for each facility‚ they must consider‚ among other expenses‚ the average monthly electric bill. They decide to sample some fast-food restaurants currently operating to estimate the monthly cost of electricity. They want to be 90% confident of their results and want the error of the interval estimate to be no more than $100. They estimate that such bills range from $600 to $2‚500. How large a sample
Premium Statistics Normal distribution Statistical hypothesis testing
Homework #4 - SQL Use the following (denormalized) database schema (and the attached tables) to write the queries. Publishers (custid‚ name‚ city‚ phone‚ creditcode) Bookjobs (jobid‚ custid‚ jobdate‚ descr‚ jobtype) POS (jobid‚ poid‚ podate‚ vendorid) Items (itemid‚ descr‚ onhand‚ price) Po_Items (jobid‚ poid‚ itemid‚ quantity) For each question‚ turn in the Oracle SQL query and the output. You should feel free to do these by hand (paper and pencil)‚ or you may actually run them
Premium SQL