types of random samples

What are the different types of sampling? => Direct sampling, indirect sampling, random sampling and systematic sampling. or Telephone survey, mail questionnaire, personal interview and direct observations. or Systematic sam..

A pizza shop conducted a study to find out whether age has anything to do with the type of pizza preferred. A random sample survey yielded the result as shown. At α = 0.05, find the chi-square test value. State whether the pizza ordered is related to the age of t..

An experiment repeated under essentially homogeneous and similar conditions results in an outcome, which is unique or not unique but may be one of the several possible outcomes. When the result is unique then the experiment is called a deterministic experiment . Any experiment whose ..

A library authority wanted to find out, ahead of its bulk purchase of books, about library user's preference for the type of books. Towards this, they conducted a random sample survey among males and females and the data is presented in the table: Romance Biographies a..

Overview of methods of data collection: Census Sample survey Experiment Observational study Planning and conducting surveys: Characteristics of a well-designed and well-conducted survey Populations, samples, and random selection Sources of bias..

A survey was conducted among the patients of two hospitals in the city to assess the general facilities in health care. What type of sampling is used? => cluster or stratified or systematic or random..

Let S be a sample space associated with a given random experiment. A real valued function X which assigns to each w i S, a unique real number, X( w i ) = x i is called a random variable . Two types of random variables are 1. Co..

Women constitute 24% of the science and engineering workforce. In a random sample of 500 science and engineering workforce, what is the probability that the sample has exactly 130 women workforce? => 4.23% or 3.24% or 3.42% or 2.54%..

Women constitute 24% of the science and engineering workforce. In a random sample of 500 science and engineering workforce, what is the probability that more than 130 are women? => 13.57% or 63.57% or 86.43% or 86.34%..

Random Variables and Probability Distributions - It is often very important to allocate a numerical value to an outcome of a random experiment. For example, consider an experiment of tossing a coin twice and note the number of heads (x) obtained. Outcome HH HT TH TT No. of heads..