Question 9 (select all that apply) The sample plan determines The accuracy of the sample results The number of people to be included in the research sample The process used to select the types of people from the research population The researcher's ability to validate the sample results All of the above Question 20 1.5 pts Which of the following is/are the main method(s) for conducting descriptive research? a. Experiments b. Test markets O c. Surveys O d. Focus groups Ob and Question 21 1.5 pts Which of the following best describes the difference between symptoms and a problem? Symptoms are signals that alert the business there may be a problem Problems are signals that alert the business there may be a bigger problem Problems are the factors that cause the symptoms Symptoms lead to problems Problems lead to symptoms