A.) Determine the null & alternative hypothesis The z-statistic The critical sco

Question

A.) Determine the null & alternative hypothesis

The z-statistic

The critical score(s) is (are)

B.) Determine the p-value

Suppose a university advertises that its average class size is 33 or less. A student organization is concerned that budget cuts have led to increased class sizes and would like to test this claim. A random sample of 43 classes was s the average class size was found o be 35.4 students. Assume that the standard deviation or class size at he college is 9 students. Using : 0.1 . complete parts a and b below. a. Does the student crganization have enough evidence to refute the college's daim? Determine the null and altenative hypotheses.

Explanation / Answer

The statistical software output for this problem is:

One sample Z summary hypothesis test:
: Mean of population
H0 : = 33
HA : > 33
Standard deviation = 9

Hypothesis test results:

Hence,

A) Hypotheses:

H0 : = 33
H1 : > 33

z = 1.749

Critical value = 1.28

P - value = 0.040

Mean n Sample Mean Std. Err. Z-Stat P-value 43 35.4 1.3724871 1.7486503 0.0402

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