Thanks for completing HCS438 Week 2 Assignment at 7/21/2012 16:52:18. Questions | Your answer | 1. A 90th percentile means the percentage of values lower than this percentile value is: | 90 percent | 2. An outlier is not a legitimate value, and it indicates mistakes in a data set, and we must delete this value in data analysis. | Wrong | 3a.
Construct a 95% confidence interval estimate of the mean lifetime. Show all work. Just the answer, without supporting work, will receive no credit. (8 pts) 21. Consider the hypothesis test given by 5.0: 5 .0: 10 pH p H In a random sample of 100 subjects, the sample proportion is found to be .
When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation? Answer: ____The term that describes 9.6 would be the mean, it is the sum of all the values divided by the total number of values______ 4. What is the range of the values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, and 9.0? Answer: __9.0 – 2.0 = 7___________ What is the median?
Answer: True Difficulty: Medium 7. A minimum variance, unbiased point estimate has a variance that is as small or smaller than the variances of any other unbiased point estimate. Answer: True Difficulty: Medium 8. We can randomly select a sample from an infinite population of potential process measurements by sampling the process at different and equally spaced time points. Answer: True Difficulty: Medium (REF) 9.
The probability of passing both is 0.57. What is the probability of passing at least one of these two courses? (10 pts) Given information: Geography is .65 and Statistics
What is the frequency of light if its wavelength is 5.4 X 10-5CM? (5.6 X 1014 Hz) ______________10. Which would have the higher frequency, light of wavelength of 521 nm or light with a wavelength of 605 nm? (521 nm) ______________11. Which would have the longer wavelength, light with a frequency of 4.5 X 1014 Hz or light with a frequency of 6.19 X 1014 Hz?
(Points : 7) Question 9. 9. (TCO 5) Explain three advantages and three disadvantages of conducting mixed methods research. (Points : 7) Question 10. 10.
Question 2.5 out of 2.5 points 8 Why are effect sizes rather than test statistics used when comparing study results? Question 9 What falls within the 95% confidence interval? Question 2.5 out of 2.5
The alternative hypothesis H1 is that the mean annual income μ is less than $50,000. H1:μ < $50,000 Significance level chosen is 5% or α = 0.05 Here, the population standard deviation is unknown. Hence, we use a t statistic Therefore the test statistic used is t = X-μS/n follows a t distribution with n-1 degrees of freedom From the t table corresponding to 0.05 probability, the critical value tα =1.6766. Hence the critical region is t < -1.6766. Alternatively, we reject the null hypothesis, if the p value is less than the significance level Substituting the value we get t = 43.74-5014.6396/50 = -3.02 The p value corresponding to t = -3.02 and 49 d.f.
The maximum household is 8 and the minimum is 1. The mode is 4,6 and 7. This graph does not follow the normal bell-curve. It is actual an inverse of the normal curve. Pairing Income vs Credit Balance Descriptive Statistics: Income ($1000), Credit Balance Variable N N* Mean SE Mean StDev Minimum Q1 Median