2. Average college cost of tuition fee for all private institutions last year was P36,400. A random sample of costs this year for 45 institutions of higher learning indicated that the sample mean was P37,900 and a sample standard deviation was P5,600. At the 0.10 level of significance, is there sufficient evidence to conclude that the cost has increased? Solution: Step 1: State the hypotheses. Ho:- Step 2: The level of significance and critical region. a = . and Zatical = Step 3: Compute for the value of one sample z test. Zcomputed = Step 4: Decision rule. Step 5: Conclusion.

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2. Average college cost of tuition fee for all private institutions last year was P36,400. A
random sample of costs this year for 45 institutions of higher learning indicated that the
sample mean was P37,900 and a sample standard deviation was P5,600. At the 0.10 level
of significance, is there sufficient evidence to conclude that the cost has increased?
Solution:
Step 1: State the hypotheses.
Ho:
Step 2: The level of significance and critical region. a =
and zgritical =
Step 3: Compute for the value of one sample z test. zcomputed
Step 4: Decision rule.
Step 5: Conclusion.
Transcribed Image Text:2. Average college cost of tuition fee for all private institutions last year was P36,400. A random sample of costs this year for 45 institutions of higher learning indicated that the sample mean was P37,900 and a sample standard deviation was P5,600. At the 0.10 level of significance, is there sufficient evidence to conclude that the cost has increased? Solution: Step 1: State the hypotheses. Ho: Step 2: The level of significance and critical region. a = and zgritical = Step 3: Compute for the value of one sample z test. zcomputed Step 4: Decision rule. Step 5: Conclusion.
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