Calculation of DMFT \ DMFS: 1- For individual 2- For population DMF = D + M + F Mean DMF = Total DMF Total No. of the subjects examined
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- The heart rate of humans are normally distributed with a mean of 90.3 bpm and std. dev. of 7.3 bpm. What are the heartbeats that separate the lower 25% from the rest and the upper 20% from the rest?the measure of variability that is influenced most by extreme values isWhat is the TWO SOURCES OF VARIABILITY?
- A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, u, of CEOS of major corporations is less than 132 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOS of major corporations and finds the mean of the sample to be 120 mm Hg and the standard deviation of the sample to be 20 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H.) and the alternative hypothesis (H,) that should be used for the test? H: u is ? |H: p is ? ? In the context of this test, what is a Type II error? v the hypothesis that u is ? ? A Type II error is ? v when, in fact, u is ? Suppose that the researcher decides to reject the null hypothesis. What sort of error might he be making? ? ?What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? H: u is ? ? Н H: µ is ? ? In the context of this test, what is a Type I error? A Type I error is ? v the hypothesis that u is ? ? v when, in fact, u is ? Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ?A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, u, of CEOS of major corporations is less than 130 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOs of major corporations and finds the mean of the sample to be 122 mm Hg and the standard deviation of the sample to be 15 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? |H: u is ? H;: µ is ? ? In the context of this test, what is a Type II error? A Type II error is ? v the hypothesis that u is ? v when, in fact, u is ? v|? Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ?
- A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, u, of CEOS of major corporations is less than 134 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOS of major corporations and finds the mean of the sample to be 122 mm Hg and the standard deviation of the sample to be 15 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? H: u is ? H: u is ? In the context of this test, what is a Type II error? A Type II error is ? fact, u is ? v the hypothesis that u is ? when, in Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ?According the World Health Organization, the Body Mass Index (BMI=Weight in Kilograms/Height in Meters?) of a healthy 5-year old girl is 15. After Palmyra, Syria, got liberated from the Islamic State, the World Food Program asks you to conduct an early assessment situation of the nutritional situation in Palmyra. You measure the height and weight of a random sample of 225 five-year old girls and obtain a sample BMI average of I = 14. 5785 and a sample standard deviation of s=2.25. Test at a = 0.01 the hypothesis that the children of Palmyra are undernourished as measured by the BMI.A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, u, of CEOS of major corporations is different from 130 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOS of major corporations and finds the mean of the sample to be 142 mm Hg and the standard deviation of the sample to be 16 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H, ) that should be used for the test? H:u is (? H: µ is (? In the context of this test, what is a Type I error? A Type I error is (? the hypothesis that u is (? when, in fact, µ is Suppose that the researcher decides to reject the null hypothesis. What sort of error might he be making?
- Suppose the rate of misprints in the printed text from a given publisher is three misprints per one hundred pages of text. Find the mean and variance of number of misprints you would expect to see in ten pages of text in a book printed by this publisher.A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He has good reason to believe that the mean systolic blood pressure, u, of CEOS of major corporations is more than 136 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOS of major corporations and finds the mean of the sample to be 148 mm Hg and the standard deviation of the sample to be 15 mm Hg. Based on this information, complete the parts below. (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the test? H, : 0 OO H, :0 D=0 O#0 (b) Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? |(Choose one) (c) Fill in the blanks to describe the Type II error that could occur if the true mean systolic blood pressure of CEOS of…A normal population has a mean= 61 and standard deviation=16. what proportion of the population is greater than 100?
