A recent study by the Institut de la statistique du Québec revealed that 49% of young Quebecers surveyed had used cannabis in the past year.

The sample consisted of 562 Quebecers between the ages of 18 and 24, randomly selected from the population.

In 19 cases out of 20, what percentage of young Quebecers have smoked cannabis in the past year?

The statistic '19 out of 20' refers to a 95% confidence interval around the given 49% value. However, without additional statistical data, the exact range cannot be calculated.

Explanation:

The question refers to a statistical concept called a

confidence interval

, which gives an estimated range of values which is likely to include an unknown population parameter. In this case, it's the percentage of young Quebecers who've used cannabis in the past year. The phrase '19 times out of 20' implies a

95% confidence interval

, typically used in statistics. However, without additional information like the standard deviation, we're unable to calculate the exact confidence interval around the 49%. Therefore, we can't offer an exact percentage range but can generally infer that the true percentage of young Quebecers who've used cannabis falls near 49%.

Learn more about Confidence Interval here:

https://brainly.com/question/34700241

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