the index value according to Marshall formula Weigworth is
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- What is the average NO3- concentration at the upslope site (3 decimal places)? What is the average NO3- concentration at the downslope site ( 3 decimal places)? Given the EPA drinking water quality standard is 10 mg/L of nitrate, is the upslope site safe to drink based only on nitrate content? (Enter yes or no) Is the downslope site safe to drink, based only on NO3- concentration? (Enter yes or no) Assuming the two sites are hydrologically well connected, the transit time between the two sites is fast, and the two sites cannot be treated as independent samples, what kind of t-test should be performed to show that the upslope site is greater than the downslope site? Enter the letter of your answer choice in the answer blank A. one-tailed unpaired t-testB. two-tailed unpaired t-testC. one-tailed paired t-testD. two-tailed paired t-test What is the calculated t statistic, rounded to 4 decimal places? Is the calculated t statistic greater or less than the critical t value reported by…The tax return forms of a certain company contains many numerical values accounting for revenues and losses. 968001 of these numerical values begin with the digit 5. 999211 of these numerical values begin with the digit 6. Do we have any concerns about the authenticity of the data of these tax declarations? - Probably yes, further investigation is worth - Impossible to decide - Probably not, all looks reasonableSuppose that you would like to create composite indexes from three stocks: stk1, stk2, stk3. Their stock prices (Pt) and total shares outstanding (Qt) from day 0 to day 1 are shown as follows: stk3 splits two-for-one in day 1. P0 Q0 P1 Q1 stk1 40 250 50 250 stk2 50 100 50 100 stk3 60 150 50 300 Which answer is the closest value to the rate of return on a price-weighted index of the three stocks? A. 20% B. 25% C. 30% D. 35%
- We wish to demonstrate that the average time to graduate from college is affected by the students having taken AP calculus in high school. Specifically we wish to demonstrate that students who have taken AP calculus in high school gradate an average of at most 0.25 years sooner than students who have not taken AP calculus in high school. If we let μ1 demote the average time to graduate for students who have not taken AP calculus and μ2 denote the average time to graduate for students who have taken AP calculus, then select the appropriate alternative hypothesis: a. μ1-μ2 = 0 b. μ1-μ2-0.25 < 0 c. μ1-μ2-0.25>0 Please explainWe wish to demonstrate that the average time to graduate from Tulane is affected by the students having taken AP calculus in high school. Specially, we wish to demonstrate that students who have taken AP calculus in high school graduate an average of more than 0.25 years sooner than students who have not taken AP calculus in high school. If we let denote the average time to graduate for students who have not taken AP calculus and denotes the average time to graduate for students who have taken AP calculus, then select the appropriate alternative hypothesis.The number of pair days off taken by eight employees at a local small business is compared to the national average. You are hired by the business owner, who has been in business for just 18 months, to help her determine what to expect for paid days off. In general, she wants to set some standard for her employees and for herself. Let's assume your search on the internet for data on paid days off leaves you with the impression that the national average is 15 days. The data for the eight local employees during the last fiscal year are: 10, 11, 8, 14, 13, 12, 12, and 27 days. 1. Write the hypothesis for your research. 2. Which type of test would be appropriate to analyze these data in order to answer your question? 3. Before doing any computations, do you have any concerns about this research? Are there any questions you might like to ask about the data you have been given?
- The number of pair days off taken by eight employees at a local small business is compared to the national average. You are hired by the business owner, who has been in business for just 18 months, to help her determine what to expect for paid days off. In general, she wants to set some standard for her employees and for herself. Let's assume your search on the internet for data on paid days off leaves you with the impression that the national average is 15 days. The data for the eight local employees during the last fiscal year are: 10, 11, 8, 14, 13, 12, 12, and 27 days. 1. Calculate the appropriate t statistic. 2. Draw a statistical conclusion. 3. Calculate and interpret the effect size.There's a new treatment for addiction and because resources are limited, a program decides it can offer it only to those people whose ASI scores are in the top 10% of scores. What raw score on the ASI would a person have to have to be eligible for the program?To reduce the number of plant accidents, ABC Co. implemented a new safety program for employees. To determine its effectiveness, the number of accidents per week was recorded before and after the implementation of the program Week 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th Before 12 10 9 15 11 8 16 13 14 20 After 10 9 12 8 6 10 12 7 5 11 Test at α = -.05 if the new safety program is effective in reducing accidents.
- A local bank is using Winters' method with α = 0.2, β = 0.1, and γ = 0.5 to forecast the number of customers served each day. The bank is open Monday through Friday. At the end of the previous week, the following seasonal indexes have been estimated: Monday, 0.90; Tuesday, 0.95; Wednesday, 1.10; Thursday, 1.25; Friday, 0.80. Also, the current estimates of level and trend are 20 and 1. After observing that 30 customers are served by the bank on this Monday, forecast the number of customers who will be served on each of the next five business days. Round your answers to one decimal place, if necessary.1. A snail is at the foot of a flight of ten steps. Everyday it will climb up three steps and climb back down two steps. After how many days when will it reach the top? 2. A time-study analyst observed a packaging operation and collected the following times (in second) required for the operation to fill package of a fixed volume box: 11, 18, 13, 18, 16, 14, 12. Solve for the average. 3. The easiest to obtain yet not necessarily a representative of the data?Suppose for a particular process that the bottleneck cycle time is 54 seconds, and raw processing time is 345 seconds. If there are 9 customers in this system already, and then you walk up and join the line at Station 1, what is your expected lead-time to move through the entire process? Whole number value, no decimals.