Over the Entire Six Years That Students Attend an Ohio

question 18

Multiple Choice

Over the entire six years that students attend an Ohio elementary school,they are absent,on average,28 days due to influenza.Assume that the standard deviation over this time period is σ = 9 days.Upon graduation from elementary school,a random sample of 36 students is taken and asked how many days of school they missed due to influenza.The probability that the sample mean is between 25 and 30 school days is _______.

• A) 0.0228
• B) 0.0918
• C) 0.8854
• D) 0.9082

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Definitions:

Significance Level

A threshold in hypothesis testing used to determine if the null hypothesis should be rejected, commonly denoted as alpha (α).

Estimates

Approximations or predictions of unknown values based on available data.

Treatments

In experimental design, interventions applied to different groups in a study to observe their effects on outcomes.

Levels

Distinct values or categories that an experimental or categorical variable can take in research or statistical analysis.