can you please send the answer a little bit faster please

Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of u = 8.0 parts per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. A random sample of 41 tests gave a sample mean of x = 6.9 ppb arsenic, with s = 2.8 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a = 0.01. In USE SALT (a) What is the level of significance? State the null and alternate hypotheses. O Holt = 8 ppb; H. : u S ppb OH: ll 8 ppb; H, : J = 8 ppb (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The standard normal, since the sample size is large and o is known. O The Student's t, since the sample size is large and o is known. O The Student's t, since the sample size is large and & is unknown. The standard normal, since the sample size is large and o is unknown. What is the value of the sample test statistic? (Round your answer to three decimal places.) (c) Estimate the P-value