From a Sample of Size 100, the Following Descriptive Measures

question 83

Multiple Choice

From a sample of size 100, the following descriptive measures were calculated: median = 23, mean = 20, standard deviation = 5, range = 35; seventy-five sample values are between 10 and 30; and ninety-nine sample values are between 5 and 35. If you knew the sample mean, median, and standard deviation were correct, which one of the following conclusions might you draw?

• A) The distribution is skewed to the right because the median exceeds the mean.
• B) The range must have been calculated incorrectly because it should not be seven times the standard deviation's value.
• C) The number of sample values between 10 and 30 was miscounted.
• D) The number of sample values between 5 and 35 must have been miscounted because all 100 values must be in this interval.
• E) All of these.

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Definitions:

Disjunction

The separation of chromosomes or sister chromatids during cell division, leading to the distribution of genetic material into daughter cells.

Chromosome 21

One of the 23 pairs of human chromosomes, an extra copy of which is associated with Down syndrome.

Linkage Map

A genetic map based on the frequencies of recombination between markers during crossover of chromosomes.

Linkage Group

Term used to identify groups of alleles on a chromosome that tend to be inherited together.