Question

HERE IS THE WORD PROBLEM:

The survey of study habits and attitude (SSHA) is a psychological test that measures students his study habits and attitudes toward school scores range from 0 to 200. the mean score for US college students is about 115 and the standard deviation is about 30. a teacher suspects that older students have a better attitude towards school she gives the SSHA 225 students who are at least 30 years old. assume that scores in the population of older students are normally distributed with standard deviation o=30. The teacher wants to test the hypothesis

USING SAMPLE MEAN OF 125.7 (alpha=0.05).... The parameter represents the population mean SSHA test score for all US college students.

state the null and alternative hypothesis

1)what is the standard score

2)what is the p-value

3)what is the decision

4)what is the conclusion

Answer 1

given data are:-

sample mean () = 125.70

population sd () = 30

sample size (n) = 225

hypothesis:-

1).test statistic be:-

2).p value:-

3).decision:-

p value = 0.000 < 0.05 (alpha)

so, we reject the null hypothesis.

4).conclusion:-

there is sufficient evidence to support the teacher's suspect that older students have a better attitude towards school at 0.05 level of significance.

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