Which of the following steps is needed in stratified random sampling? Select the best answer. A....
Which choice best describes a simple random sample? O a selection of members of a population chosen because of their convenient accessibility and proximity O when a population is first sorted into groups that share a similar characteristic and individuals are randomly chosen from each of the groups O a selection of members from a population in such a way that every possible sample of the same size has an equal chance of being chosen O when a population is...
Identify which of these types of sampling methods is used: random, simple random, systematic, convenience, stratified, or cluster. A researcher wants to investigate whether body mass index (BMI) depends on gender. From each group of females and males he then randomly selects 50 individuals. A quality control engineer selects every 100th thermometer that is produced by the company. A researcher randomly selects ten blocks in the Village of Newport, and then asks all adult residents of the selected blocks whether...
(1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. B. a sample of size n chosen in such a way that every set of n units in the population has an equal chance to be the sample actually selected. C. a sample of size...
1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has a known nonzero chance of being selected. B. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. C. a sample of size n chosen in such a...
Identify which type of sampling is used: random, stratified, cluster, convenience, voluntary response, or systematic. 1. A local business man attends a community event highlighting local businesses and asks attendees how they feel about one of his new products. 2. A large company drug tests its employees once a month. It is too expensive to test all the employees so the company assigns a number to each employee and has a computer randomly generate 15 numbers each month. The numbers...
3. Determine which sampling (simple random, stratified, cluster, systematic, or convenience) is used in the following situation: a. If we have a population of 100 elements and we want a sample of 50 elements, first of all, we establish the selection interval that will be equal to 5. If we choose the first element, randomly taking a number between 1 and 5, and, at from it we obtain the remaining elements of the sample. 8. Identify if the following situation...
Please answer number 4 and if possible, upload a picture showing
all the necessary steps
The serum cholesterol levels of a population of 12-14 year olds follow a normal distribution with a mean of 162 mg/dl and a standard deviation of 28 mg/dl. Consider randomly selecting 9 individuals of this population, measuring each individual's cholesterol level, and then computing the sample mean of these 9 subjects 3. 1 pt If X is the sample mean cholesterol level of the 9...
CLUSTER SAMPLING WITH ESTIMATION Suppose a population of size N is divided into K- N/M groups of size M. We select a sample of size n -km the following way: » First we select k groups out of K groups by simple random sampling . We then select m units in each group selected on the first step by simple random sampling . The estimate of the population mean is the average Y of the sample. Let μί be the...
Fill in the blank (#1-10) Fill in the blank on the following questions with the corresponding vocabulary word. 1. The number of classes a given student is registered for this semester would be an example of a variable type. 2. The sample standard deviation (s) is an example of a that describes the_. because it is a number is a subset of the population in which data is collected from. 4. A is a number that describes the population. S....
I just need the answer for E and F, thank you:)
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean p=123 days and standard deviation = 13 days. Complete parts (a) through (1) below. (a) What is the probability that a randomly selected pregnancy lasts less than 118 days? The probability that a randomly selected pregnancy lasts less than 118 days is approximately 0.3503). (Round to four decimal places as needed.) Interpret this...