sample test

Which of the following statements is/are true? I. The sampling distribution is a theoretical distribution of a sample statistic. II. Sampling distribution is same for each sample statistic. III. A sample distribution contains a finite number of scor..

Which of the following is a property of sampling distribution? I. Mean of sampling distribution equals population mean. II. Sample mean comes closer to population mean than any other unbiased mean. III. As sample size increases, variation of sample ..

The organizer of a math contest estimates that the average score of the students in a particular test will be less than 60. A sample of 20 students are selected for the test and their average score was found as 58 with a standard deviation of 6. Test the orga..

A cement manufacturer claims that the maximum final setting time of cement is 10 hours. A sample of 13 bags were tested and found that the mean of the maximum final setting time was 11.2 hours with a standard deviation of 1.8 hours. At α = 0.01, can the claim be rejected? ..

Which of the following are the assumptions needed for the goodness-of-fit test? I. The data are obtained from a random sample. II.The expected frequency for each category must be 5 or more. III.The expected frequency for each category must be less than 5. => II and III only or I..

The basic assumption(s) for estimating the difference between two variances is/are: I. The samples must be dependent on each other. II. The samples must be independent of each other. III. The populations from which the samples were obtained must be normally distributed..

When two dice are rolled, the sample space consists of how many events? => 6 or 6 2 or 2 6 or 2 × 6..

A survey is conducted on the importance of health care for the elderly. The samples below list the percentages of people surveyed in different age groups. Identify the sample which is biased. => Sample 3 or Sample 4 or Sample 2 or Sample 1..

A manufacturer found that there were 25 defective units out of the 180 sample units. Find the decimal number which is equivalent to the fraction of the defective units to the total number of sample units. => 0.33 or 0.17 or 0.23 or 0.13..

Women constitute 24% of the science and engineering workforce. In a random sample of 500 science and engineering workforce, what is the probability that the sample has exactly 130 women workforce? => 4.23% or 3.24% or 3.42% or 2.54%..