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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 689 women (40 and older) is taken, and each is asked the date of their last mammogram.

np =   and n(1 - p) =

It was found that 440 women in the sample had a mammogram in the last two years. Test the appropriate hypotheses using a significance level of 0.10.

H0:

Ha:

α=

Test Statistic: z =

probability =

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