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Feliz [49]
3 years ago
5

In the beginning of the study, a randomly selected group of 121 students scored an average of 252 words per minute on the readin

g speed test. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M
Mathematics
1 answer:
Alborosie3 years ago
5 0

Answer:

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

Step-by-step explanation:

We use the central limit theorem to solve this question.

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a sample size larger than 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

So

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

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