sample test questions ohio class d knowledge test

Samples of concrete blocks were tested in a lab to determine the crushing strength of the concrete. The crushing strength of block E was missing from the final records. The sample mean of the crushing strength was recorded as 4.45 tonnes/cm 2 . Find the crushing streng..

The line graph shows the temperature variations in Ohio state. On which day was the minimum temperature recorded? => Monday or Friday or Sunday or Tuesday..

The line graph shows the temperature variation during a particular week in Ohio. Find the difference between the maximum and the minimum temperatures recorded. => 65 o F or 60 o F or 55 o F or 50 o F..

The line graph shows the temperature variations in Ohio during a particular week. What was the least temperature recorded? => 75°F or 55°F or 65°F or 25°F..

What are the different types of sampling? => Direct sampling, indirect sampling, random sampling and systematic sampling. or Telephone survey, mail questionnaire, personal interview and direct observations. or Systematic sampling, unbiased..

A coin is tossed. Write the sample space. => {T} or {H, T} or { } or {H}..

Three coins are tossed. Write the number of elements in the sample space. => 4 or 6 or 2 or 8..

What formula is used to gain information about a sample mean when the variable is normally distributed or when the sample size is 30 or more? => z = X - μ σ or z = X ‾ - μ σ n or z = X ‾ - μ σ n or z = X - μ σ..

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 ..

Select the incorrect statement(s). I. A sampling distribution of sample means is a distribution obtained by using the means computed from random samples of a specific size taken from a population. II. Sampling error is the difference between the sample..