If a confidence interval for the mean is (38≤μ≤89)(38≤μ≤89), a) What is the point estimate? b) What is the margin of error?
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If a confidence interval for the
a) What is the point estimate?
b) What is the margin of error?
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- Which two quantities are needed to estimate the standard error of the proportion‘s toward the further estimation of confidence interval‘s for proportion’s? A) sample mean and sample standard deviation B) sample proportion in sample size C) population proportion in population size D) population mean and population standard deviation ( don't Hand writing solution)2. The margin of error is twice the length of a confidence interval. True FalseIf a confidence interval for the mean is (43≤μ≤82)(43≤μ≤82),a) What is the point estimate? b) What is the margin of error?
- Suppose we are interested in the mean of Statistics exam scores. A random sample of 36 scores is taken and gives a sample mean of 68 points. The population standard deviation is 3 points. i) By using the same 90% confidence level, what happens to the confidence interval if we increase the sample size and use n = 100?We want to estimate the mean number of chocolate chips per cookie for a large national brand. How many cookies would have to be sampled to estimate the true mean number of chocolate chips per cookie, within 2 chocolate chips and the 98% confidence? Assume that s=11.2 chocolate chips, from a prior sampleIn 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 pictureWe 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.
- 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 falseIn 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.