Exam 10: The Normal Distribution

When mating two heterozygotes for alleles in which one is dominant to the other, if the usual Mendelian segregation process is occurring, the ratio of the offspring phenotypes produced should be 3:1. The dominant phenotype would be more common than the recessive one. Imagine a situation in which two heterozygotes are mated and among their 200 offspring, 160 show the dominant phenotype while 40 show the recessive phenotype. What is the P-value of a two-sided binomial test using the normal distribution to approximate the binomial?

Consider a population of 900 values that are normally distributed with a mean of 90 and standard deviation of 6. What value of Z below most closely corresponds to the 65th percentile?

Which equation shown is correct for a normal distribution with a mean of 20 and a variance of 10?

Consider a population of 900 values that are normally distributed with a mean of 90 and standard deviation of 6. To the nearest integer, how many values are greater than 84?

Imagine a population consisting of 1,500 values that are normally distributed around a mean of 60, which exhibits a standard deviation of 8. What proportion of values in the population are larger than 63?

The equation for a normal distribution with a mean of 20 and a variance of 30 is $f(x)=\frac{1}{\sqrt{30 \pi}} e^{\frac{-(x-20)^{2}}{60}}$

The standard normal deviate describes how many standard deviations away from the mean that a value is.

Which of the following is not a property of the normal distribution?

The placebo effect appears equally effective at improving a wide variety of conditions, including pain, cholesterol levels, and blood pressure.

Consider a population of 900 values that are normally distributed with a mean of 90 and standard deviation of 6. To the nearest integer, how many values are between 87 and 99?

The total area under the normal probability distribution is equal to which of the following?