Has the marrying age of a man changed over the years? the united states bureau of the census takes a formal count of everyone in the u. s. every 10 years and has provided the following data that gives the median age of an american man at the time of his first marriage. year 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 median age 25.1 24.6 24.3 24.3 22.8 22.8 23.2 24.7 26.1 26.8 what does a rate of change of zero mean in this situation? a. the median age of a man at the time of his first marriage is, on the average, constant. b. the median age of a man at the time of his first marriage is, on the average, decreasing. c. the median age of a man at the time of his first marriage is, on the average, increasing. d. the rate of change cannot be zero in this situation.

Option a is right

Step-by-step explanation:

The question is about whether  the marrying age of a man has changed over the years.

Has the marrying age of a man changed over the years? The United States Bureau of the Census takes a formal count of everyone in the U.S. every 10 years and has provided the following data that gives the median age of an American man at the time of his first marriage.

Year            1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

Median Age 25.1 24.6 24.3 24.3 22.8 22.8 23.2 24.7 26.1 26.8

Rate of change of zero means the median did not change

IN other words

a. The median age of a man at the time of his first marriage is, on the average, constant

is right

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step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;