Question

Each student needs to get a partner from the class and create a team that will use Excel from the Web Site.

Each member of the team needs to collect the probability of passing any course with A.

Then ask more than 30 students the expected grade at the end of the course and determine if your initial proportion remains with a confidence level of 90%.

Prepare a report using the five steps statistics.

Answer 1

p̂ = 17/30 = 0.5667

p = 0.5

n = 30

The hypothesis being tested is:

H0: p = 0.5

Ha: p ≠ 0.5

The test statistic, z = (p̂ - p)/√p(1-p)/n

z = (0.5667 - 0.5)/√0.5(1-0.5)/30

z = 0.73

The p-value is 0.4652.

Since the p-value (0.4652) is greater than the significance level (0.10), we fail to reject the null hypothesis.

Therefore, we can conclude that the initial proportion remains with a confidence level of 90%.

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