QUESTION 3
A higher accuracy in computing the sample number the higher the size of the sample.
True
False
QUESTION 4
When the sample mean is 60, alpha is 0.10, the sample size is 25, and the standard deviation is 2, the two side confidence interval is 60 ± 0.658.
True
False
QUESTION 3 A higher accuracy in computing the sample number the higher the size of the...
4. With of 75, alpha is 0.10, the sample size is 25, and the sample standard deviation (s) is 5, the two side confidence interval is 75 ± 1.711. True False 5. When the sample standard deviation is 5, the sample size is 25, the accuracy is 3, and alpha is 0.10, the sample size according to that accuracy is 9. True False
QUESTION 1 The higher the sample size the less the confidence level. True False QUESTION 2 The confidence interval does not depend of the standard deviation. True False
QUESTION 5 When the standard deviation is 2, the accuracy is 0.2, and alpha is 0.10, the sample size according to that accuracy is 271. True False
QUESTION 1 1. The sample variance or the sample standard deviation are good approximate of the population variance or standard deviation? True or False QUESTION 2 1. The Central limit theorem states that the individual results or when n is 1 in an experiment that unique outcome follow a Normal Distribution? True or False QUESTION 3 1. In hypothesis testing alpha is the probability of being judged correct? True or False QUESTION 4 1. If the critical Z is ±...
To compute the confidence level and the sample size lets vary the confidence level and the accuracy of the textbook example of the mean burn of the sample of propellants. T 51.3 n was equal to 25 propellants a 0.05 Z Zo025 1.96 o 2 cm/second Let change a 0.01, and the other variables remain the same. The new c accuracy is 0.01 cm/se Questions 1. If you change the alpha from 0.05 to an alpha of 0.01 the confidence...
Here is an example with steps you can follow: sample size n=9, sample mean=80, sample standard deviation s=25 (population standard deviation is not known) Estimate confidence interval for population mean with confidence level 90%. Confidence Interval = Sample Mean ± Margin of Error Margin of Error = (t-value)×s/√n t-value should be taken from Appendix Table IV. For n=9 df=n-1=9-1=8 For Confidence Level 90% a = 1 - 0.90 = 0.10, a/2 = 0.10/2 = 0.05 So, we are looking for...
Question Completion Status: QUESTION TZ A sample of size 18 is drawn from a population with standard deviation 2.3. Calculate the standard error of the mean. Round your answer to 2 decimal points if needed. QUESTION 13 Suppose ACME corporation is trying to test if their new propane gas tank lasts longer than the 20 hours their previous model lasted. Which one of the following is a correctly stated hypothesis? A HT: 220 OB, Ho: 220 c. Ho: u >...
QUESTION 4 When the mean is 52, the sample size is 25, and the standard deviation is 2, the probability of committing Type II error when P( 50 < < 54) is one (1). True False
Question 2 You may use the Normal distribution when you have the standard deviation of the sample and the sample size is higher than 30. True False Question 3 With of 98 and a sample standard deviation of 10, the sample size of 16, and the population mean (μ) of a 100, the experimental t value is 0.8, and the P – value is between 0.10 and 0.25. True False
Question 13 3 pts Question 28 3 pts Small Sample Mean Problem. A study was done to determine the effect of vitamin supplements for the mother on the birth weight of babies. The sample size was 17. All the women in the study regularly Small Mean Problem. Grandfather clocks have a particular market in Question 27 3 pts visited a doctor during their pregnancy. The data below show the auctions. One theory about the price at an auction is that...