Healthy subjects aged 18 to 40 participated in a study of eating habits. Subjects were given bags of potato chips and bottled water and invited to snack freely. Was there a difference between men andwomen in the number of potato chips consumed? Here are the data on grams of potato chips consumed.Group n Mean Standard DeviationMales 9 38 15Females 11 12 10What is the 90% confidence interval for the difference in mean number of potato chips consumed between men and women. Assuming the correct critical value is 1.645 (which it is not), calculate theconfidence interval using the information above.O -4 to 5616 to 36O 23 to 29O 24 to 28

Given that Sample sizes n1=9 , n2=11 Sample means x1=38 , x2=12 Standard deviation s1=15 , s2=10

Answered: healthy aged women in the number of…

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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Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the SE mean for the sales from china? Calculate a 95% confidence interval for the mean sales amount made in America. Use the statistical tables when necessary and show all workings
Need help on a and finding the t and p value
For data of discussion 1 refer to this picture What is the best point estimate for your survey question that you used in Discussion 1? Be sure to include both the correct notation (symbol) and the value. Construct a confidence interval for the responses to your survey. Assume that you do not know the population standard deviation. Indicate your level of confidence and the corresponding critical value. What is the margin of error? If we would increase the sample size to 500 students, what would happen to your margin of error?
Need help with C and D please
all 3 parts please
You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 13 randomly selected college students. Round answers to 3 decimal places where possible. 7 8 8 0 2 11 6 10 2 0 1 3 1 With 90% confidence the population mean number of days of class that college students miss is between and days.
The weights of corn grew on a farm has a mean of 23 ounces and has a standard deviation of 3 ounces. A sample of the corn grown was selected, and the weights of the selected boxes are summarized in the histogram shown. 32 28 24 16 18 19 20 21 22 23 24 25 26 27 28 Weights of the corn ears Part A: How many corns have weights that are more than 1 standard deviation above the mean? Part B: How many corns have weights that are more than 1 standard deviations below the mean? Number of ear of corns
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?
Score last try: pts. See Details for more. You can retry this question below For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 28 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.1 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between 12.41 X hours and 13.58 x hours on Statistics each week. b) 95% of the students spend between 11.82 X hours and 14.7 X hours on Statistics each week. c) 99.7% of the students spend between 11.24 X hours and 14.76 X hours on Statistics each week.
The ages of undergraduate students at two universities (one in the east and one in the west) are being compared. Researchers want to know if there is a difference in the mean age of students at the two universities. The population standard deviations are known. The following data shows the results of samples collected at each institution: School Location n (sample size) sample mean ( ) population standard deviation West 33 25.78 6.29 East 35 23.16 7.52 What is the value of the test statistic for the previous problem? (Enter your answer as a positive value even if you calculated a negative test statistic value i.e. if you calculated -1.311 you should enter 1.311). Round your answer to 3 decimal places.
Also need... Find standardized test statistic Find P Value Reject or fail to reject & is or is not enough evidence
A service data on the body mass index of 654 young women the mean body mass index in the sample was X bar equals 26.8 service data on the body mass index of 654 young women the mean body mass index. We treated these data as an SRS from a normal distribution population with a standard deviation of 7.5 A. given 3 confidence intervals for the mean BMI in the population using 90 95 and 99% confidence. B. What are the margins of air for 90, 95 and 99% confidence? how does increasing the confidence level change the margin of error of a confidence interval when the sample size and population standard deviation remain the same

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