In a test for acid rain, an SRS of 49 water samples showed a mean pH level of 4.4 with a standard deviation Of 0.35. Find the
margin of error and write an expression for the 90% confidence interval estimate for the mean pH level.

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Formulate the indicated conclusion in nontechnical terms. be sure to address the original claim. the foundation chair for a hospital claims that the mean number of filled overnight beds is over 523, and she is therefore justified starting a funding campaign to add a wing to the hospital. assuming that a hypothesis test has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.