stat question. thanks for your help.

A random sample of 100 students is taken from a larger population of students in a multi-lecture course and the sample mean (average) of their final grades is 67. Suppose it is known that the population standard deviation is 4. You test whether there is significant evidence that the population average differs from 68, using a level of significance of 1%. Choose the most correct statement. Note: You will have to calculate the test statistic by hand, but you can use R commander to get your pvalue. Your pvalue statement is 2P(Z 2.50), your pvalue is 0.0248 and your decision is to fail to reject Ho Your pvalue statement is 2P(Z 2.50 ), your pvalue is 0.0124 and your decision is to reject Ho. Your pvalue statement is 2P(Z 2.50), your pvalue is 0.0124 and your decision is to fail to reject Ho Your pvalue statement is 2P(Z 2.50), your pvalue is 0.0062, and your decision is reject Ho. A random sample of 100 students is taken from a larger population of students in a multi-lecture course and the sample mean (average) of their final grades is 58. Suppose it is known that the population standard deviation is 5. Use R commander to help you test, with a significance level of 0.01, whether there is significant evidence that the average grade for the population is below 59. Which of the following statements is most correct? Your pvalue is 0.023 and you can reject your null hypothesis. Your pvalue is 0.023 and you cannot reject your null hypothesis. Your pvalue is 0.977 and you can reject your null hypothesis. Your pvalue is 0.977 and you cannot reject your null hypothesis