The calculated average for the validation sample is compared to theknown value to determine the validity of the experimental procedure.The known [NO3] for NX is 4.60 mg/L.Which t-test should be used to determine if there is a statisticallysignificant difference between the known value and the averageexperimental data from the previous question?|x-x > t*(s + S*m1m2mlm2> t*s,,(n, + n,)/n,n,)*-l4 -x| > t*s

Hypothesis tests are of two types- associational and difference.

Answered: The calculated average for the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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In a test of Ho:= 90 against Ha: µ> 90, the sample data yielded the test statistic z = 2.17. Find and interpret the p-valte for the test. E Click the icon to view a table of standard normal values The p-value isp= (Round to three decimal places as needed.)
A population of N = 25 scores has ΣX = 40 and ΣX2= 120. For this population, what is the value of SS (sum of squared deviations)?
Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd = 0. x / 6 2 3 2 3 y / 8 7 9 7 14 Compute the absolute value of the test statistic. (Round your answer to nearest hundredth. Hint: The correct test statistic is positive.)
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately 80.3. You would like to be 95% confident that your estimate is within 1 of the true population mean. How large of a sample size is required? Use a critical value rounded to three decimal places.
please only answer 12.62
You wish to test the following claim (Ha) at a significance level of a Hd = µ2 – Hl¡ where the first data set represents a pre-test and the second data set represents a post-test. = 0.01. For the context of this problem, %3/ Ha: Hd 7 0 0 = Prl :°H You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n = 61 subjects. The average difference (post - pre) is d deviation of the differences of sd = 22.6. = 4.3 with a standard What is the critical value for this test? (Report answer accurate to three decimal places.) critical value = ± %3D What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = %3D
In a multiple regression analysis, k=5 and n=31. The MSE value is 11.83 and the SS total is 407.99. At the 0.05 significance level, can we conclude that any of the regression coefficients are not equal to 0? (Round answers to 2 decimal places) Ho: B1=B2=B3=B4=B5=0 H1: Not all B's equal 0 df1 = ? df2 = ? ; so Ho is rejected if F > ? Fill table below Source SS DF MS F Regression ? ? ? ? Error ? ? ? Total 407.99 30
The manufacturer claims that your new car gets 24 mpg on the highway. You suspect that the mpg is less for your car. The 44 trips on the highway that you took averaged 22.3 mpg and the standard deviation for these 44 trips was 4.2 mpg. What can be concluded at the αα = 0.05 level of significance? For this study, we should use (t-test for population mean, z-test for population proportion) The null and alternative hypotheses would be: H0: (symbol) (symbol) ____ H1: (symbol) (symbol) ____ The test statistic (?,t,z) = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is (?, less than or equal to, more than) αα Based on this, we should (accept, reject, fail to reject) the null hypothesis. Thus, the final conclusion is that ... The data suggest that the sample mean is not significantly less than 24 at αα = 0.05, so there is statistically insignificant evidence to conclude…
The prices of Rawlston, Inc. stock (y) over a period of 12 days, the number of shares (in 100s) of the company's stocks sold (x1), and the volume of exchange (in millions) on the New York Stock Exchange (x2) are shown below. 4. Perform an F test and determine whether independent variable and dependent variable are related. Fully interpret the meaning. Use α = .05 5. Conduct Residual Analysis and fully interpret the meaning. 6. If on a given day, the number of shares of the company that were sold was 94,500 and the volume of exchange on the New York Stock Exchange was 10 million, what would you expect the price of the stock to be? GRAPH IS SHOWN BELOW
Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is µd = 0. x / 734 13 y / 99 8 7 13 Compute the value of the test statistic. (Round your answer to nearest hundredth. Hint: The correct test statistic is positive.)
You wish to test Ho: Md = 0 versus Ha:μd 0 at a significance level of 0.10. For the context of this problem, d = μ₂ μ₁ where the first data set represents a pre-test and the second data set represents a post-test. You obtain pre-test and post-test samples for na 25 subjects. The average difference (post-pre) is d 7 with a standard deviation of the differences of sd = 11.6. = Round your answers to three decimal places, and round any interim calculations to four decimal places. What is the test statistic? =
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.6 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 14 samples is 4.9 ppm with a variance of 1.2 Does the data support the claim at the 0.01 level? Assume the population distribution is approximately normal. Step 2 of 5 : Find the value of the test statistic. Round your answer to three decimal places.

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