I don't know how to calculate the question 2 please help me check the part 1 and help me with part 2 and 3

1.A nutrition laboratory tests 40 "reduced sodium" hot dogs, finding that the mean sodium content is 310 mg with a standard deviation of 36 mg.Find a 95% confidence interval for the mean sodium content of this brand of hot dog.Be sure to check all necessary assumptions and conditions and interpret your interval within the context of the problem.

Z=1.96

E=1.96*36/sqrt(40)=11.16

310-11.16<<310+11.16

298.84<<321.16

2.Conduct a hypothesis test at the 0.025 significance level as to whether the mean sodium content level differs from 300mg. Provide the: H_0,H_a, test statistic, and approximate P-value. Interpret your decision in the context of the claim.

3.Does your confidence interval in question 1 support or contradict your decision in question 2?Explain.

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