A researcher believes that design and the safety of the cars is very important for the customers when buying a car. In order to understand the brand perception of customers' researcher shows three different car pictures and ask them "can you classify this car (in picture) as "sporty" or "safety"? the following cross tabulation is obtained. Test the claim that car brand and consumer perception is dependent. Automobiles Sporty Safety BMW 120 110 Mercedes 80 90 Renault 40 60 1. Calculate the test statistics. 2. If the table value is 4.86, what is your managerial conclusion?

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.