Statistics

Please help me with this question:

For an IQ test, we know the population � 5 100 and the �X 5 16. We are interested
in creating the sampling distribution when N 5 64. (a) What does that sampling
distribution of means show? (b) What is the shape of the distribution of IQ
means and the mean of the distribution? (c) Calculate �X for this distribution.
(d) What is your answer in part (c) called, and what does it indicate? (e) What is
the relative frequency of sample means above 101.5?

  1. 👍
  2. 👎
  3. 👁
  1. Let say that I have computed value for t is +3.28. The critical value of t is +2.048. How would you explain this? Would the null hypothesis or not? I have a 28 degree of freedom and are using a two tailed non-directional test how cold I illustrate the relationship between the critical and the computed values of t for the result?

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math I need help ASAP!

    1. which of the following is true of a random sample? a. it is the only way to sample a population. b. each member of the sample is a volunteer. c. it is always the easiest way to sample a population. d. each member of the

  2. statistics

    A travel company is investigating whether the average cost of a hotel stay in a certain city has increased over the past year. The company recorded the cost of a one-night stay for a Friday night in January of the current year and

  3. Math

    The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is

  4. Stats

    A sample of 400 items is taken from a population whose standard deviation is 10. The mean of the sample is 40. Test whether the sample has come from a population with mean 38. Also calculate 95% confidence interval for the

  1. statistics

    For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1

  2. probability

    A new medical test has been designed to detect the presence of the mysterious Brainlesserian disease. Among those who have the disease, the probability that the disease will be detected by the new test is 0.7. However, the

  3. math

    On a multiple- choice test, the chance of randomly guessing the correct answer to a question is 25%. if you guess the answer to every question on a 20 question test, how many question should you expect to get correct?

  4. Statistics

    A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.8 g with a

  1. statistics

    The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is

  2. statistics

    In performing a hypothesis test, the null hypothesis is population mean = 6.9 and the alternative hypothesis is population mean ≠ 6.9, a random sample of 16 items is selected. The sample mean is 7.1 and the sample standard

  3. statistics

    A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, (u = 58). A random sample of 14

  4. Statistic

    18. Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on

You can view more similar questions or ask a new question.