Identify which of these types of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster. A market researcher has partitioned all residents of a certain region into categories of unemployed, employed full time, and employed part time. She is surveying 42 people from each category.

The department head of a private secondary school in Marikina City surveyed randomly selected students from each grade level to know their readiness in limited face-to-face classes. a. Simple Random Sampling b. Systematic Sampling c. Stratified Sampling d. Cluster Sampling

A real-estate appraiser wants to verify the market value for homes on the east side of the city that are very similar to size and style. The appraiser wants to test the popular belief that the average sales price is $37.80 per square foot for such homes. Suppose that a random sample of six sales were selected. The sampled sales prices per square foot are $35.00, $38.10, $37.20, $29.80, $30.30, and $35.40. Assuming a normal distribution is a good model for sales, test the claim that the mean sales price per square foot differs from $37.80 at the 1% significance level.

The Board of Directors for a group medical practice is analysing the business. They have data on the day to day operations o the practice along with patient information. They randomly selected 10 days from each of the 6 months they have been in operation and collected information on income. What type of sampling method was used? Select one:   a Mutstage Randon Sampling b. Voluntary Sampling c. Simple Random Sampling d. Stratified Random Sampling e None Cluster Sampling

Consider the following sets of sample data: A: 2.6, 3.8, 2.6, 4.0, 1.9, 1.8, 4.3, 2.2, 1.9, 2.0, 4.4, 4.4, 3.0, 3.8 B: $2.64, $2.18, $1.92, $2.31, $2.64, $1.40, $1.82, $1.68, $2.51, $1.29, $2.34 Step 1 of 2: For each of the above sets of sample data, calculate the coefficient of variation, CV. Round to one decimal place. Answer How to enter your answer (opens in new window) TV for Data Set A: CV for Data Set B: % %

Identify the sampling techniques used in each scenario. a candidate for the local school board surveyed parents picking up their children from the public school on three school days in the last month.

The following describes a sample. The information given includes the five number summary, the sample size, and the largest and smallest data values in the tails of the distribution. Five number summary: (31, 61, 67, 69, 88); n = 120 Tails: 31, 52, 54, 56, 57,..., 77, 78, 84, 85, 88 Clearly identify any outliers using the IQR method. Select all that apply. No outliers 31 52 54 56 SE 57 77 78 84

In which one of the following sampling techniques, the samples are selected based on the proportion of the categories? a. Stratified sampling b. Cluster sampling c. Systematic sampling d. Random Sampling