Exam 5: The Normal Distribution

The number of standard deviations that a given raw score is above or below the mean is referred to as a

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.Suppose that a person experienced their first marriage at age 23.If the area beyond the Z score associated with age 23 is 0.24,what proportion of respondents experienced their first marriage before age 23?

In a normal distribution,there is a constant proportion of the area under the curve lying between the mean and any given distance from the mean and is measured in

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.Calculate the Z score associated with an observed age at first marriage of 25.50 and provide a substantive interpretation of this quantity.

Suppose that in a particular sample,the mean is 70.07 and the standard deviation is 10.27.What is the Z score for a raw score of 65?

The normal distribution is central to the theory of ______ statistics.

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.Calculate the observed age at first marriage associated with a Z score of -0.72.

Scores for an exam are normally distributed with a mean of 235 and a standard deviation of 52.What is the percentile rank of a raw score 287?

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.The Z score associated with the top 5% of the distribution is approximately 1.65.What is the observed age at first marriage associated with this Z score?

The mean number of siblings for respondents in a survey is 3.76 with a standard deviation of 3.18.The standard normal table reports the following information in the table below.Calculate the percentile rank for three siblings.

The normal distribution is a ______ and ______ symmetrical distribution with the mean,the median,and the mode all coinciding at its peak and with the frequencies gradually decreasing at both ends of the curve.

To find proportion of the area under the normal curve between two Z scores,one below the mean and the other above the mean,it is necessary to examine the

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.For a first age at marriage of 33.44,the proportion of area beyond the Z score associated with this age is 0.05 .What is the percentile rank for this score?

SELECT ALL THAT APPLY. -The normal distribution is

Suppose that the area above some Z score is 0.31,which when multiplied by 100 equals 31%.What is the term for this quantity?

The mean number of siblings for respondents in a survey is 3.76 with a standard deviation of 3.18.The standard normal table reports the following information in the table below.Calculate the proportion of respondents who had between two and three siblings.

What percentage of the area under the normal curve falls between ±3 standard deviations?

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.Calculate the Z score associated with an observed age at first marriage of 25.50.

The normal distribution is a theoretical distribution.

The mean age at first marriage for respondents in a survey is 23.33,with a standard deviation of 6.13.Suppose that the proportion of area between the mean and two Z scores of ±0.35 is 0.14.Calculate the raw scores associated with these two Z scores.What proportion of respondents were first married between these two ages?