The mean serum-creatinine level measured in 15 patients 24 hours after they received a newly proposed antibiotic was 1.2 mg/dL. You can use SALT to answer parts of this question. (a) If the mean and standard deviation of serum creatinine in the general population are 1.0 and 0.4 mg/dL, respectively, then, using a significance level of 0.05, test whether the mean serum-creatinine level in this group is different from that of the general population. State the null and alternative hypotheses (in mg/dL). (Enter != for as needed.) Ho: H₁: Find the test statistic. (Round your answer to two decimal places.) Find the rejection region. (Round your answers to two decimal places. If the test is one-sided, enter NONE for the unused region.) test statistic > test statistic < State your conclusion. Fail to reject Ho. There is sufficient evidence to conclude that the mean serum-creatinine level in this particular group of patients is different from that of the general population. Reject Ho. There is sufficient evidence conclude that the mean serum-creatinine level in this particular group of patients is different from that of the general population. Fail to reject Ho. There is insufficient evidence to conclude that the mean serum-creatinine level in this particular group of patients is different from that of the general population. Reject Ho. There is insufficient evidence conclude that the mean serum-creatinine level in this particular group of patients is different from that of the general population. (b) What is the p-value for the test? (Use technology to find the p-value. Round your answer to four decimal places.) p-value=

2. Simply. "a) -5v45 - V52 3V125

Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 86 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean μ = 86 tons and standard deviation σ = 1.1 ton.(a) What is the probability that one car chosen at random will have less than 85.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 29 cars chosen at random will have a mean load weight x of less than 85.5 tons of coal? (Round your answer to four decimal places.)

Compute.

question 21 parts c and d

Can you answer part c, d and e of the question?