please help me answer this one, thank you!
b. Due to limited contact with ALS students, the researcher tested a small number parameter? of ALS students. Explain the effect of this small sample on the estimate of the 2. A confidence interval estimate has a maximum error of 2.50. If the distribution of the data where the estimate is obtained is normal with a standard deviation of 9, a. How many samples are considered in 98% confidence interval estimate for the mean? b. What must be done to the sample size to reduce the margin of error of the confident interval estimate? Support your answer.What's More below. Apply the knowledge you obtained from the discussion by solving the given problems 1. A 99% confidence interval has to be created to estimate the mean volume of contents in the bottles of Honey-Z. Assume that the population standard more than: deviation is 20 ml. Calculate the sample size needed if the margin of error is no a. 6 ml c. 4 ml b. 5 ml d. 3 ml 2. How large sample size is required to determine the mean IQ of seventh graders of Luis Palma National High School within +3 points, population standard deviation of 15, and with the following confidence level? C. 90%. a. 98% d. 80%. b. 95%.What I Have Learned To summarize what you have learned from this module try completing the following statements. Write the correct word or phrase in a separate sheet of paper. is a process of finding the number of elements to be 1. drawn from a population to create sub-group called sample, subject for a study. 2. The sample size is determined by the equation 3. In the formula/ equation for the sample size, n is the required sample size, za, is the O represents the and is the margin of error. which influence the sample size determination are 4 . The factors and 5. As the sample size gets larger, the margin of error gets 6. The level of confidence determines how certain you want to be that the parameter fall within your confidence interval. . The more confident you want to be, the the sample size needs to be. What I Can Do Read the following problems carefully. Apply your skills in solving the following cases. 1. A researcher found that the IQ scores of the ALS students in the Division of Quezon Province are normally distributed with a mean of 110 and a standard deviation of 10. a. How many ALS students are needed to test so that the estimate will not be more than 5 from the population mean with a 99% level of confidence?What's In Let's have this first for a review. Use the given information to compute the sample size. 1 . Za, = 2.576, 0 = 12 E = 3 n = ? 2. Za/, = 1.96, 0 = 25 E = 2 3. level of confidence = 90% level of confidence = 99% standard deviation = 23 standard deviation = 15 margin of error = 5 margin of error = 4 sample size = ? sample size = ? 5. Compute for the sample size if the margin. of error is 6, with a sample standard deviation of 20 and a 95% level of confidence. What's New In each of the situations below, identify the values of the following: A. confidence level C. standard deviation, (o) B. critical value, (Za/2) D. margin of error, (E) Situation 1 A researcher would like to estimate the mean weight loss of people one year after using a specific weight loss program. How many people on the weight loss program must be surveyed in order to be 95% confident that the sample mean weight loss is within 0.75 pounds of the true population mean? Assume the population standard deviation is known to be 10.4 pounds. A. confidence level = C. standard deviation, (o) = B. critical value, (Za/2) = D. margin of error, (E) = 3Situation 2 An investigator wants to estimate the mean birth weight of infants born full- term to mothers who are 19 years of age and under. The mean birth weight of infants born full-term to m to mothers 20 years .of age and older is.3,510 grams with a standard of 385 grams. How many women 19 years of age and under must be enrolled in the study to ensure that a 90% confidence on interval estimate of the mean birth weight of their infants has a margin of error not exceeding 100 grams? C. standard deviation, (o) = A. confidence level = B. critical value, (Za/2) = D. margin of error, (E) = Situation 3 A medical practitioner wants to estimate the mean systolic blood pressure in pre- school children with inborn heart disease. He plans on using a 99% confidence interval and a margin of error of 5 units. The standard deviation of systolic blood pressures in pre-school children with inborn heart disease is 20. How many children should be enrolled in the study? A. confidence level = C. standard deviation, (o)= B. critical value, (Za/2) = D. margin of error, (E) =
