You have 600 cars in a car park. Each car has 6 windows except 10 which have only 5 and 50 that have only 4 windows! A robber co
1 answer:
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Answer:
Anneliese needs cups of butter to make
of the recipe for cookies.
Step-by-step explanation:
According to the statement, a recipe for cookies require cup of butter and the amount of butter required to prepare
of the recipe is determined by the following simple rule of three:
Anneliese needs cups of butter to make
of the recipe for cookies.
Answer:
The mean of the sampling distribution of means for the 36 students is of 18.6 homework hours per week.
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this question:
For the population, the mean is 18.6. So, by the Central Limit Theorem, the mean of the sampling distribution is also 18.6.