You're a store manager and you are struggling to encourage employees to have perfect attendance.You hear about an incentive program that can encourage employees to come in for every assignedshift. You take data for 30 days (as a percentage of days missed), then do the program for 30 days,then you take data for another 30 days while continuing the program (as a percentage of daysmissed).Pre ProgramAttendancePost ProgramAttendance3545.951.0044.64.73.93.891.001.00.571.00.90.59.75.97.37.51.00 6. Compute1. Standard deviation2. Standard error7. Determine critical values of1. Test statistic2. Sample statistic

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Answered: 6. Compute 1. Standard deviation. 2.…

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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Compare the mean and median for each major. By your comparison, what do you expect the shape of the distribution for the graduates starting salaries of each major?
What are mean and standard deviation for the heights of people in that country? What is your z-score with these new parameters? The average height for Pilipino men are 5 foot, 3.7 inches with a standard deviation of 2.92 inches. The average height for Pilipino women are 4 foot, 11 inches with a standard deviation of 2.8 inches.
Total blood volume (in ml) per body weight is important in medical research. For healthy adults, the red blood cell volume mean is about 34 ml/kg. Red blood cell that is too low or too high can indicate a medical problem. Suppose that Roger has 20 blood tests and the mean is 35.4 ml/kg. Suppose that red blood cell volume follows normal distribution with standard deviation 2.34 ml/kg. With 5% significance level, test that the mean blood cell volume is different from 28ml/kg. Which test to use? a.) None of the answer choices b.) T-test for the Mean c.) T-test for Proportion d.) Z-test for the Mean e.) Z-test for Proportion
10. mean = 54.2; standard deviation = 12,3
Lengths of pregnancies of women are normally distributed with a mean of 266 days and a standard deviation of 16 days. What percentage to the nearest hundredth of children are born from pregnancies lasting more than 274 days? What percentage to the nearest hundredth of children are born from pregnancies lasting less than 246 days?
A survey of 50 retail stores revealed that the average price of a microwave was $375 with a sample standard deviation of $20. Assuming the population is normally distributed, what is the 99% confidence interval to estimate the true cost of the microwave? 367.42 to 382.58 323.40 to 426.60 335.82 to 414.28 please use a good hand writting
The gestation period of humans follows a normal distribution with a mean of 266 days and standard deviation of 16 days. If random samples of 15 pregnancies are studied, what is the mean and standard error of th sampling distribution of the sample mean? mean of the sampling distribution [ Choose ] standard error of the sampling distribution [ Choose ]
9. True or False? Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to determine if there is a difference in the mean dosage of the medication. If the mean dosage for 75 Caucasian individuals required to get their INR blood test in range is 6.1 mg with a standard deviation of 1.7 mg and the mean dosage for 75 African American individuals required to get their INR blood test in range is 4.3 mg with a standard deviation of 0.9 mg, the decision rule for a 10% level of significance would be to reject H0 if z ≤ -1.645 or z ≥ 1.645
The mean age when smokers first start is 13 years old with a population standard deviation of 1.8 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 33 smokers found that their mean starting age was 12 years old. What type of test should you use? A) z-test for population mean B) t-test for population mean C) z-test for population proportion
1. Why do result of population mean and mean of sample means differ? 2. Why do results of population standard deviation and standard deviation of sample means differ?
2. Past record showed that the average final examination grade in Math 10 is 70 with the standard deviation of 8.0. A random sample of 100 students were taken and found to have a mean final exam grade of 71.8. Is this an indication that the sample is better than the rest of the students? Test at 0.05 level of significance. Type of test = Z-computed = Z-tabular =
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6. Compute 1. Standard deviation. 2. Standard error 7. Determine critical values of 1. Test statistic 2. Sample statistic