$1.$Pfizer Inc. is a research$-$based, global pharmaceutical company. We discover and develop innovative, value$-$added products that improve the quality of life of people around the world.$$ The above statements indicate:A$)$ How a company can lure customers into thinking they are a socially responsible company.B$)$ A consumer demand$-$oriented definition of the companyC$)$ A product$-$oriented definition of the companyD$)$ A product$-$related mission$2.$ A type of research design involving a fixed sample of population that is measured repeatedly is called:A$)$ Cohort analysisB$)$ Cross sectional designC$)$ Longitudinal designD$)$ Panel$3.$ A scale in which the numbers are used to rate objects is called:A$)$ Ordinal scaleB$)$ Ratio scaleC$)$ Interval scaleD$)$ None of the above$4.$ Suitable test for testing the hypothesis for two but independent samples with metric data would be:A$)$ T$-$testB$)$ Paired T$-$testC$)$ Two$-$group t$-$testD$)$ Chi$-$squared test$5.$ For particular research we have decided to collect data from a sample group once. This approach is known as:A$)$ Single cross$-$section studyB$)$ Multiple cross$-$section studyC$)$ Longitudinal studyD$)$ Panel study$6.$ Mr$.$ Rahman wants to purchase a new battery for his car because his current battery is giving problems. The price of a new battery is $5000$TK$.$ Mr$.$ Rahman went to a battery shop where the salesperson suggested him to give them his old battery plus some money and in return, he can get a new battery. The salesperson said that the price of Mr$.$ Rahman$$s old battery is $1500$TK$.$ Hence, how much is the trade in allowance that the shop will earn?A$)5,000$B$)3,000$C$)2,000$D$)1,500$