Answer:
The decision rule is
Fail to reject the null hypothesis
The conclusion is
There is no sufficient evidence to conclude that the average is a different number for college students
Explanation:
From the question we are told that
The sample size is n = 50
The population mean is
The sample mean is
The standard deviation is
The level of significance is

The null hypothesis is

The alternative hypothesis is

Generally the test statistics is mathematically represented as

=>

=>

From the z table the area under the normal curve to the left corresponding to -1.237 is

Generally the p-value is mathematically represented as

=>

Generally from the values obtained we see that

Hence
The decision rule is
Fail to reject the null hypothesis
The conclusion is
There is no sufficient evidence to conclude that the average is a different number for college students