If a confidence interval for the mean is (41≤μ≤84)(41≤μ≤84), a) What is the point estimate? b) What is the margin of error?
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If a confidence interval for the mean is (41≤μ≤84)(41≤μ≤84),
a) What is the point estimate?
b) What is the margin of error?
a) What is the point estimate?
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- A confidence interval has been determined to be -6<u<6, what was the sample mean that was used to produce this confidence interval?In an estimation of the confidence interval, increase of the size of the sample will O decrease the margin error. None of these not effect the margin error. increase the margin error.3b) see picture
- We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 228 had kids. Based on this, construct a 90% confidence interval for the proportion � of adult residents who are parents in this county. < � <How would a person set up the hypotheses if they wanted to test the claim: the mean length of a Pyramid Lake trout is greater than 21 inches? What would be a type Il error in this case? O State the mean length of a Pyramid Lake trout is greater than or equal to 21 inches when in fact the mean length of a Pyramid Lake trout is less than 21 inches. State the mean length of a Pyramid Lake trout is less than or equal to 21 inches when in fact the mean length of a Pyramid Lake trout is greater than 21 inches. State the mean length of a Pyramid Lake trout is less than 21 inches when in fact the mean length of a Pyramid Lake trout is greater than or equal to 21 inches. O State the mean length of a Pyramid Lake trout is greater than 21 inches when in fact the mean length of a Pyramid Lake trout is less than or equal to 21 inches.A random sample of high school seniors were asked whether they were applying for college. The resulting confidence interval for the proportion of students applying for college is (0.65,0.69). What is the margin of error?
- WHO (World Health Organization) states that 1500 cals is the average daily calorie intake for the people in Hatay. A group of 100 people are selected from there, and the mean and standard deviation of the daily calorie intake are found to be 1700+HI cals and 900 cals, respectively. Use 5% significance level and; a) Perform a test of hypothesis if the WHO statement about the daily average calorie intake still holds? b) Find the probability of committing a Type II error and calculate the Power of Test when the real average is 1800+HI. H is 3 and I is 2What will happen to the precision of a confidence interval if the variability of a sample gets reduced, all other things equal?If n = 500 and ˆp (p-hat) = 0.15, construct a 90% confidence interval.Give your answers to three decimals < p <
- 17. Confidence interval is for population parameter and prediction interval is for a variable . Select one: True of falseUse the given confidence interval to find the margin of error and the sample mean. (15.2,21.8) The sample mean is (Type an integer or a decimal.) The margin of error is | (Type an integer or a decimal.)In a random sample of nine people the main driving distance to work was 21.2 miles and the standard deviation was 4.2 miles assume that the population is normally distributed construct a 95% confidence interval for the mean write your answer as an inequality including units.