Question: Answer the following questions using the z-score chart . 2. The Weights of 100 remote control cars at a competition are approximately normally distributed. The

Answer the following questions using the z-score chart .

2. The Weights of 100 remote control cars at a competition are approximately normally distributed. The average weight is 3.2 kg, with a standard deviation of 0.4 kg.

a. How many remote control cars would be disqualified if it were against the rules to have a car with a weight of more than 4 kg or less than 2.4 kg? b. A car is said to be in the 90th percentile. How much does it weigh?

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