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The histogram of a sample should have a distribution shape that is skewed. Is this true or false?

False. It can be skewed to the left or right or be symmetrical.


The F-distribution is symetrical around mean zero True or False?

The F-distribution is either zero or positive, so there are no negative values for F. This feature of the F-distribution is similar to the chi-square distribution. The F-distribution is skewed to the right. Thus this probability distribution is nonsymmetrical.


True or false The distribution of income should be left to the market is an example of a positive economic statemente?

True


True or false A graph that is skewed neither left nor right is symmetric?

This is true


In a negatively skewed dist. following statements are true except?

In a negatively skewed distribution, the mean is typically less than the median, and the median is less than the mode. This results in a tail that extends longer to the left. Therefore, any statement claiming that the mean is greater than the median or that the mode is less than the median would be false. Thus, one must be careful to identify which statements accurately reflect the characteristics of negatively skewed distributions.


True or false A Proton is positively charged and found in the orbitals?

False. A proton is positively charged and found in the nucleus of an atom, not in the orbitals where electrons are located.


True or False A sampling distribution is a probability distribution for a statistic?

The statement is true that a sampling distribution is a probability distribution for a statistic.


A grouped frequency distribution is used when the range of data values is relatively small. True or false?

False. When the range is large you would use a grouped frequency distribution.


Is this qeustion true or false the movement of the continents has had little impact on the distribution of species?

false


Is it true or false that in a parallelogram the opposite angles are complementary?

Generally false. In a parallelogram, the opposite angles are equal. They could be complementary in a highly skewed parallelogram in which one angle is 45 degrees.


When an atom gains electrons it becomes positively charged true or false?

False. When an atom gains electrons, it becomes negatively charged, not positively charged. This is because electrons are negatively charged particles.


How the symmetric distribution is always normal?

The statement is false. The binomial distribution (discrete) or uniform distribution (discrete or continuous) are symmetrical but they are not normal. There are others.