The accompanying data is on cube compressive strength (MPa) of concrete specimens.112.1 97.0 92.7 86.0 102.099.5 95.8 103.5 89.0 86.9LAUSE SALT(a) Is it plausible that the compressive strength for this type of concrete is normally distributed?The normal probability plot is acceptably linear, suggesting that a normal population distribution is plausible.O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is plausible.O The normal probability plot is acceptably linear, suggesting that a normal population distribution is not plausible.O The normal probability plot is not acceptably linear, suggesting that a normal opulation distribution is not plausible.(b) Suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 MPa. Should the concrete be usedState the appropriate hypotheses.OH:100H₂H 100OHM < 100H₂ = 100OHH > 100H₂=100OH₂ H = 100#100H₂=100H < 100Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.)t=136P-value=0xx

Given data is 112.1,97.0,92.7,86.0,102.0,99.5,95.8,103.5,89,86.9 From this we have to calculate…

Answered: The accompanying data is on cube…

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 do a, e, and f only
A car company says that the mean gas mileage for its luxury sedan is at least 20 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 5 cars has a mean gas mileage of 18 mpg and a standard deviation of 2 mpg. At α=0.10, test the company's claim. Assume the population is normally distributed. Click here to view the t-distribution table. LOADING... Click here to view page 1 of the normal table. LOADING... Click here to view page 2 of the normal table. LOADING... Question content area bottom Part 1 Which sampling distribution should be used and why? A. Use a t-sampling distribution because the population is normal, and σ is unknown. Your answer is correct. B. Use a normal sampling distribution because the population is normal, and σ is known. C. Use a t-sampling distribution because n<30. D. Use a normal sampling distribution because n>30. E. Use a normal sampling distribution…
A scientist claims that pneumonia causes weight loss in mice. The table shows the weights (in grams) of six mice before infection and two days after infection. At a=0.10, is there enough evidence to support the scientist's claim? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (e) below. Mouse Weight (before) Welght (after) 1 2 3 4 5 22.7 21.6 20.6 20.6 21.7 22.9 21.3 20.9 19.9 20.2 20.6 21.7 H: >0 O D. Ho: H20 OE Ho: H0 OF. Ha: H zd 0> PH :"H (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in any answer boxes to complete your choice. (Round to three decimal places as needed.) OA. te B. t> 1476 OC. t (c) Calculate d and s d= 0.917 (Round to three decimal places as needed.) Calculate sg S= 0.376 (Round to three decimal places as needed.) (d) Find the standardized test statistic t. t= (Round to three decimal places as needed.)
Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…
Shear-strength measurements for spot welds of a certain type have been found to have a standard deviation of approximately 10 psi. If 100 test welds are to be measured, find the approximate probability that the sample means will be within 1 psi of the true population mean.
Below, the 31-year maximum significant wave heights are classified. The arithmetic mean of the 31-year maximum significant wave heights is 0.88 m and the standard deviation is 0.06 m. Check (test) whether this classified data set data is suitable for normal distribution or not at the 5% significance level . Class Number of data 0.75 - 0.80 2 0.80 - 0.85 7 0.85 - 0.90 12 0.90 - 0.95 4 0.95 - 1.00 5 1.00 - 1.05 1
A credit card company claims that the mean credit card debt for individuals is greater than $5,000. You want to test this claim. You find that a random sample of 27 cardholders has a mean credit card balance of $5,199 and a standard deviation of $575. At α=0.05, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed.
A car company says that the mean gas mileage for its luxury sedan is at least 22 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 7 cars has a mean gas mileage of 20 mpg and a standard deviation of 2 mpg. At α=0.10, test the company's claim. Assume the population is normally distributed. Click here to view the t-distribution table. LOADING... Click here to view page 1 of the normal table. LOADING... Click here to view page 2 of the normal table. LOADING...
Please answer the incorrect parts, thank you!
Which way of dispensing champagne, the traditional vertical method or a tilted beer-like pour, preserves more of the tiny gas bubbles that improve flavor and aroma? The following data was reported in an article. Type of Pour n Mean (g/L) SD 0.6 Traditional 4 Slanted Traditional 4 0.4 0.2 Slanted 4 0.1 Assume that the sampled distributions are normal. Temp (°C) 18 18 12 12 LUSE SALT (a) Carry out a test at significance level 0.01 to decide whether true average CO₂, loss at 18°C for the traditional pour differs from that for the slanted pour. (Use μ, for the traditional pour and State the relevant hypotheses. OH₂H₂H₂ 0 OHH₁-H₂0 H₂H₁-H₂=0 OH₂H₁ H₂=0 H₂H₁ H₂ <0 (b) Repeat the test of hypotheses suggested in (a) for the 12° temperature. Is the conclusion different from that for the 18° temperature? Note: The 12° result was reported in the popular media. (Use u, for the traditional pour and for the slanted pour.) State the relevant hypotheses. OHH, H₂ <0 H₂₁₂4₁₂4₂₁₂=0 - OH₂H₁-H₂=0 H₂H₂H₂ #0…
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 191 lb. The new population of pilots has normally distributed weights with a mean of 147 lb and a standard deviation of 28.7 lb. Click here to view page 1 of the standard normal distribution Click here to view page 2 of the standard normal distribution. COS a. If a pilot is randomly selected, find the probability that his weight is between 140 lb and 191 lb. The probability is approximately (Round to four decimal places as needed.) b. If 38 different pilots are randy selected, find the probability that their mean weight is between 140 lb and 191 lb. The probability is approximately (Round to four decimal places as needed.) c. When redesigning the ejection seat, which probability is more relevant? A. Part (b) because the seat performance for a sample of pilots is more important. OB. Part (a) because the seat performance for a single pilot is more important. OC.…
A car company says that the mean gas mileage for its luxury sedan is at least 22 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 6 cars has a mean gas mileage of 21 mpg and a standard deviation of 2 mpg. At α=0.10, test the company's claim. Assume the population is normally distributed. Click here to view the t-distribution table. LOADING... Click here to view page 1 of the normal table. LOADING... Click here to view page 2 of the normal table. LOADING... Which sampling distribution should be used and why? A. Use a normal sampling distribution because the population is normal, and σ is known. B. Use a t-sampling distribution because the population is normal, and σ is known. C. Use a normal sampling distribution because the population is normal, and σ is unknown. D. Use a t-sampling distribution because n<30. E. Use a normal sampling distribution because n>30. F. Use a…

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