Question

Use the empirical rule to find the following probabilities. remember to draw a normal curve, label the x -values for 1, 2, and 3 standard deviations from the mean, and write in the probabilities between each standard deviation before answering the questions. on average, upstate chevrolet sells 20 cars each week, with a standard deviation.

how many cars sold represents 2 standard deviations above the mean?

Answer 1

To find the number of cars sold that represents 2 standard deviations above the mean, we need to know the standard deviation, which is not given in the question.

Step-by-step explanation:

To find the number of cars sold that represents 2 standard deviations above the mean, we can use the empirical rule. The empirical rule states that approximately 95% of the data falls within two standard deviations of the mean in a bell-shaped distribution. In this case, the mean number of cars sold is 20 per week and the standard deviation is not given, so we'll assume it's known. To find the number of cars sold that represents 2 standard deviations above the mean, we'll use the formula:

Number of cars sold = Mean + (2)(Standard Deviation)

Number of cars sold = 20 + (2)(Standard Deviation)

Unfortunately, without knowing the standard deviation, we cannot calculate the exact number of cars sold that represents 2 standard deviations above the mean.