Name Show appropriate work in the space provided; no partial credit can be a inc
ID: 3067062 • Letter: N
Question
Name Show appropriate work in the space provided; no partial credit can be a incorrect answers if there is no supporting work s hown 1. The best point estimate of a population mean is a) H c) s b) d) a A 95% confidence interval of the true mean of the population a) gives 95% of the true mean. b) uses 95% of the population as the sample. c) has a 95% probability of containing ? has a 95% probability of containing R In a 95% confidence interval, what quantity is guaranteed to be contained in the interval? 3. b) c) d) none of these 4. Which of the following results in a smaller confidence interval? 1) changing the confidence level from 90% to 95% II) changing the sample size from 30 to 55 b) II) c) neither change will lead to a smaller confidence interval d) both changes will lead to a smaller confidence interval Follow the rounding rule discussed in class when constructing confidence intervals points will be deducted for values which have the wrong number of decimal places 5. The average weight of 40 randomly selected minivans was 4150 pounds a) the best point estimate of the population mean of minivan weights If the standard deviation of all minivan weights is 480 pounds, find b) the 95% confidence interval of the population mean of minivan weights.Explanation / Answer
Since we can't answer assignment question, I will take 1 question:
1. The best point estimate of a popualtion mean is : b) Xbar
A point estimate of a population parameter is a single value used to estimate the population parameter. For example, the sample mean x is a point estimate of the population mean
2. 95% CI of true mean of the population doesn't gives the facts in a or b. It just given the probability
that the true mean or Mu is within these interval estimates
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