# According to a report issued by the CDC in 2013, 66.8 % of women 40 years…

According to a report issued by the CDC in 2013, 66.8 % of women
40 years of age and over had a mammogram within the last two years.
An oncologist at the CDC would like to know if there has been a
change in this percentage over the last two years. A random sample
of 749 women (40 and older) is taken, and each is asked the date of
their last mammogram.

Verify that the assumptions have been satisfied to conduct a
hypothesis test.

Random sample? Select an answer No Yes
The variable recorded was: Select an answer Percentage of women
who have had a mammogram in the last two years Number of mammograms
received Date of last mammogram Mammogram occurred in last two
years
np =  and n(1 – p) = . Both of the values are greater
than 10: Select an answer True False

It was found that 481 women in the sample had a mammogram in the
last two years. Test the appropriate hypotheses using a
significance level of 0.05.

H0:H0: Select an answer p p̂  ? ≠ > =
≠
αα =    decision rule: reject H0H0 if
probability ? ≠ < >   αα
Test Statistic: z =   (Note: round the z-score
to two decimal places – carry at least four decimal places