A custodian wishes to compare two competing floor waxes to decide which one is best. He believes that themean of WaxWin is less than the mean of WaxCo.In a random sample of 60 floors of WaxWin and 33 of WaxCo. WaxWin had a mean lifetime of 20.5 andWaxCo had a mean lifetime of 20.6.The population standard deviation for WaxWin is assumed to be 10.3 and the population standard deviationfor WaxCo is assumed to be 8.4.Perform a hypothesis test using a significance level of 0.10 to help him decide.Let WaxWin be sample 1 and WaxCo be sample 2.The correct hypotheses are:Ο Ηο: μι < μεHA: M1 M₂(claim)Ο Ηο: με 2 μεHA1₂(claim)O Ho: ₁ = 2HA: M12(claim)Since the level of significance is 0.10 the critical value is -1.282(round to 3 places)The test statistic is:The p-value is:(round to 3 places)

Answered: A custodian wishes to compare two…

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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Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 600 grams while babies born after a gestation period of 40 weeks have a mean weight of 3100 grams and a standard deviation of 510 grams. If a 35-week gestation period baby weighs 2900 grams and a 41-week gestation period baby weighs 3500 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period? ..... Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The baby born in week 41 weighs relatively more since its Z-score, is smaller than the z-score of for the baby born in week 35. B. The baby born in week 35 weighs relatively more since its z-score, is smaller than the z-score of for the baby born in week 41. O C. The baby born in week 35 weighs relatively more since its z-score, is…
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The difference in the Organic Chemistry final exam scores between last semester and three years ago will be analyzed by the dean. Although the standard deviations of these populations are unknown, the dean has evidence that they are equal. A sample of 41 of these scores from last semester had a mean of 63.7 and standard deviation of 4.6, and a sample of 37 scores from three years ago had a mean of 64.7 and standard deviation of 5. A claim is made that the mean final exam score from last semester ( 1) is less than the mean final exam score from three years ago (2). For each part below, enter only a numeric value in the answer box. For example, do not type "z =" or "t=" before your answers. Round each of your answers to 3 places after the decimal point. 1 (a) Calculate the value of the test statistic used in this test. Test statistic's value= (b) Use your calculator to find the P-value of this test. P-value = 0.180 F3 Submit Question 4 R F4 H % 5 T Q F5 A 6 Y F6 & 7 U F7 * PrtScn 8 F8…
12) If the standard deviation of a data set is (17.2); the variance will be (295.84). Select one: True False
Birth weights in the US are normally distributed with a mean of 3420 g and a Standard deviation of 495 g. If a hopsital plans to set up special observation conditions for the lightest 3% of babies, what weight is used for the cut-off separating the lightest 3% from others?
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 3000 grams and a standard deviation of 700 grams while babies born after a gestation period of 40 weeks have a mean weight of 3400 grams and a standard deviation of 560 grams. If a 35-week gestation period baby weighs 2600 grams and a 41-week gestation period baby weighs 3000 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The baby born in week 41 weighs relatively less since its z-score, is larger than the z-score of for the baby born in week 35. O B. The baby born in week 41 weighs relatively less since its z-score, , is smaller than the z-score of for the baby born in week 35. O C. The baby born in week 35 weighs relatively less since its z-score, , is…
The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million and a standard deviation of $2 million. The salaries of professional football players are also heavily skewed right with a mean of $1.9 million and a standard deviation of $1.5 million. A random sample of 40 baseball players’ salaries and 35 football players’ salaries is selected. The mean salary is determined for both samples. Let represent the difference in the mean salaries for baseball and football players. Which of the following represents the standard deviation of the sampling distribution for ? A) 0.41 million B) 0.57 million C) 2.5 million D) 3.5 million
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A certain type of battery supercharger was found to take a mean of 12.3 minutes to charge a standard electric vehicle (EV) battery. A firmware update for this type of supercharger was recently released, but the update has received negative reviews from users. A researcher suspects the mean time the updated superchargers take to charge a standard EV battery is greater than 12.3 minutes. To test his claim, he chooses 21 of the updated superchargers at random and measures the time it takes each one to charge a standard EV battery. He finds that the superchargers take a sample mean of 12.9 minutes to charge a standard EV battery, with a sample standard deviation of 1.3 minutes. Assume that the population of amounts of time to charge a standard EV battery using the updated superchargers is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that u, the mean time…
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 600 grams while babies born after a gestation period of 40 weeks have a mean weight of 3000 grams and a standard deviation of 470. If a 32-week gestation period baby weighs 2200 grams and a 40-week gestation period baby weighs 2500 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. The baby born in week 32 weighs relatively less since its z-score, _____, is larger than the z-score of ______ for the baby born in week 40. B. The baby born in week 40 weighs relatively less since its z-score, ______, is smaller than the z-score of negative ________ for the baby born in week 32. C. The baby born in week…
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 3000 grams and a standard deviation of 600 grams while babies born after a gestational period of 40 weeks have a mean weight of 3300 grams and a standard deviation of 435 grams. If a 34-week gestation period baby weighs 3175 grams and a 40-week gestation period baby weighs 3475 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period?
The number of peas in a pod varies from farm to farm. In a random sample of 50 pods from farm A, there was a mean of 4.2 peas per pod with a standard deviation of 1.03 peas per pod. In a random sample of 50 pods from farm B, there was a mean of 5.1 peas per pod with a standard deviation of 1.92 peas per pod. Agricultural researchers want to find evidence whether the pods from farm B have more peas per pod on average. What is the appropriate hypothesis test? a paired t-test for a mean difference a one-sample z-test for a population mean a two-sample t-test for a difference in means a one-sample z-test for a population proportion a two-sample z-test for a difference in proportions

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