The compressive strength of concrete is being studied and four different mixingtechniques are being investigated. The following data have been collected.CompressiveStrength (psi)13129300028652890Mixing Techniquea.) What is the problem?b.) What are the hypotheses?232003300297531503280029002985305042600270026002765Test the hypothesis that mixing techniques affect the strength of theconcrete. Use a = 0.05.c.) Using EXCEL, provide a screenshot of the results.d.) Conclusion

Given data: 1 2 3 4 3129 3200 2800 2600 3000 3300 2900 2700 2865 2975 2985 2600 2890 3150…

Answered: The compressive strength of concrete is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Please use the five steps in hypothesis testing. (a) Meteorology: Storms Weatherwise is a magazine published by the American Meteorological Society. One issuegives a rating system used to classify Northeaster storms that frequently hit New England and can cause muchdamage near the ocean. A severe storm has an average peak wave height of μ=16.4 ft for waves hitting the shore. Suppose that a Northeaster is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 36 waves showed on average wave height of x̄=17.3 ft. Previous studies of severe storms indicate that σ=3.5 ft. . Does this information suggest that the storm is perhaps temporarily increasing above the severe rating? Use a=0.01
Use Linear, Quaratic and Cubic interpolations to solve the question.
Water is poured into a large, cone-shaped cistern. The volume of water, measured in cm, is reported at Which of the following would linearize the data for volume and time? different time intervals, measured in seconds. The scatterplot of volume versus time showed a curved Seconds, cm3 O In(Seconds), cm3 Seconds, In(cm') pattern. O In(Seconds), In(cm³)
Use the following equations to perform calculations necessary to complete the CFU. Use the table below to calculate Z, skewness, and kurtosis. Use the table below to calculate Z, skewness, and kurtosis. X Z Z^3 Z^4 4 4 5 6 7 8 9 9 10 10 12 Ez^3 Ez^4 N = 11 Mean = 7.63 SD = 2.66 Calculate the skewness for the data above and Round to two decimal points.
Given the Z scores of: -1.5, 0.52, -1.0, 1.7 and 3.0: 1. Calculate the raw skewness and kurtosis scores for these data. 2. Calculate the standard error scores for skewness and kurtosis for these data. 3. Calculate the Z scores for skewness and kurtosis for these data.
As concrete cures, it gains strength. The following data represent the 7-day and 28-day strength in pounds per square inch (psi) of a certain type of concrete. Complete parts (a) through (f) below. 7-Day Strength (psi), x 3340 3390 3380 2300 2480 28-Day Strength (psi), y 4630 5220 5020 4070 4120 Determine the P-value of this hypothesis test. P-value=_____. (Round to three decimal places as needed.)
My questions are indicated below. Follow up questions for experiment 2: Using the data in Experiment 2, investigate how the RHA addition and the admixture addition affect the concrete compressive strength. a. Do the amount of RHA affect the compressive strength? How so? b. Does the admixture affect the compressive strength? How so? c. How does the variation in RHA and admixture addition affect the compressive strength? Which of them has the stronger influence on the compressive strength? d. Do we have sufficient evidence to identify an optimum % addition that will result to maximum compressive strength? Support your answer or provide recommendations, if not possible to know the optimum % addition. Take your time in answering. I know it is hard. I tried my best to solve this problem, I just want to double check and make sure that my answer is correct. Thank you so much!
Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type. 5.5 7.2 7.3 6.3 8.1 6.8 7.0 7.1 6.8 6.5 7.0 6.3 7.9 9.0 8.9 8.7 7.8 9.7 7.4 7.7 9.7 7.9 7.7 11.6 11.3 11.8 10.7 The data below give accompanying strength observations for cylinders. 6.5 5.8 7.8 7.1 7.2 9.2 6.6 8.3 7.0 8.4 7.1 8.1 7.4 8.5 8.9 9.8 9.7 14.1 12.6 11.5 Prior to obtaining data, denote the beam strengths by X,, . Xm and the cylinder strengths by Y,, . Y. Suppose that the X,'s constitute a random sample from a distribution with mean u, and standard deviation o, and that the Y's form a random sample (independent of the X's) from another distribution with mean H2 and standard deviation (a) Use rules of expected value to show that X – Y is an unbiased estimator of µ, - µ. E(X – Y) E(X) – E(Y) = H1 - H2 nm E(X - Y) (E) – E(Y)* = l1 - 42 E(X - Y) = nm( E(X) – E(Yn) = H1 - H2 E(X – Y) E(X - Y) = V E(X) – E(Y) = µ1 – H2 E(X) – E(Y) = µ1 - 42 Calculate the estimate for the given data.…
Please help me with B
please answer thankyou
Please help me in solving point d and c.

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