(b) Calculate the z-score for the largest value and interpret it in terms of standard deviations. Do the same for the smallest value.Round your answers to two decimal places.The largest value:Z-score = 2.11The maximum of 39.5% obese isThe smallest value:Z-score =-2.21The minimum of 23.0% obese isi23.7939.07standard deviations abovestandard deviations belowthe mean.the mean. Variable N Mean StDev Minimum Q1 Median Q3 MaximumObese 50 31.43 3.8223.028.630.934.439.5

The variable is Obese. The mean is 31.43 x¯=31.43 The standard deviation is 3.82. s=3.82 The minimum…

Answered: Variable N Mean StDev Minimum Obese 50…

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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Wheaties cereal is claimed to have an average of 3 grams of dietary fiber per serving. We want to test this hypothesis and to see whether we believe that is true or that the mean amount of fiber is significantly different from 3 grams. A random sample of 25 servings was taken and it yielded a sample mean of 3.4 grams with the sample standard deviation in the amount of fiber, s = .8 grams. %3D Assume that software has determined the p-value to be.02. Carry out the test at the 5% level of significance. Be sure to state your decision rule and your decision for the test. O Fail to Reject the null hypothesis since the p-value is .05 O Fail to Reject the null hypothesis since the p-value is > .05
The mean number of eggs per person eaten in the United States is 252 and the standard deviation is 68. Do college students eat more than the average? The 45 college students surveyed averaged 281 eggs per person. What can be concluded at the 0.05 level of significance? H0: = 252 Ha: _____________ 252 Test statistic: __________ p-Value =__________ Reject/Fail to reject H0?______________ Conclusion: There is____________ evidence to make the conclusion that the population mean number of eggs consumed college students per year is more than 252 eggs per student per year. p-Value Interpretation: If the mean number of eggs consumed per year for college students is equal to_________ and if another study was done with a new randomly selected group of 45 college students, then there is a ____________ percent chance that the average number of eggs consumed per year for this new sample would be greater than_____________ . Level of significance…
10 points Q/ In the vehicle speed test, the results are given in the table below: Find 1. Arithmetic mean 2. Standard deviation 3. Skew coefficient 4. Kurtosis coefficient Speed range (km/hr Speed range (km/hr Speed range (km/hr Frequency(fi) Frequency(fi) Frequency(fi) 34-35.9 44-45.9 22 54-55.9 13 36-37.9 46-47.9 8 56-57.9 38-39.9 4 48-49.9 18 58-59.9 6. 40-41.9 10 50-51.9 17 60-61.9 42-43.9 7 52-53.9 16 62-63.9 3 add file
Plzz explain. With details.
Calculate the p- value for each of the given hypothesis test scenarios below Round p-values to four decimal places Find the p-value for a left-tailed test of hypothesis for a mean when the test statistic has been calculated as -2.42, Assume the population standard deviation is known p-value Find the p-value for a right-tailed test of hypothesis for a proportion when the test statistic has been calculated as 0.81. p-value = Find the p-value for a two-tailed test of hypothesis for a proportion when the test statistic has been calculated as 1 p-value Find the p-value for a two-tailed test of hypothesis for a mean when the test statistic has been calculated as -2.18. Assume the population standard deviation is known. p -value
Do men and women differ in the number of hours per day they have to relax?
1. A researcher is interested in knowing if there is a relationship between the years presented in the table below and the average number of people in a family receiving welfare benefits. Year Average Family Size 1969 4.0 1973 3.6 1975 3.2 1979 3.0 1983 3.0 1988 3.0 1991 2.9 a. What are your conclusions and observations about the relationship between the two variables b.What is the value of the intercept a? c. What is the value of the slope b? d. Write the linear regression equation
M5
llustration 11.12. You are given the position in a factory before and after the settlement of an industrial dispute. Comment on the gains or losses from the point of the workers and that of the manage- ment. Before 2,440 45.5 After 2,359 47.5 No. of workers Mean wages Median wages Standard deviation 49.0 45.0 12.0 10.0
Using Symmetry and the Empirical Rule A standardized test is approximately normally distributed with a mean score of 7272 and a standard deviation of 55. Use the symmetry of the normal curve and apply the Empirical rule to answer the questions. Make a sketch of the curve to help you determine the areas.Note: You must use the Empirical Rule values 68%68%, 95%95%, and 99.7%99.7% in your computations. The computer calculator will not give you the correct answer. What percent of students scored greater than 7272?____ % What percent of students scored between 7272 and 7777?_______ % What percent of students scored between 6767 and 7777? ______% What percent of students scored between 5757 and 6262? _____%

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Variable N Mean StDev Minimum Obese 50 31.43 3.82 23.0 Median Q3 Maximum Q₁ 28.6 30.9 34.4 39.5