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 637 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
• Date of last mammogram
• Mammogram occurred in last two years
• Number of mammograms received
• np =and n(1 - p) =. Both of the values are greater than 10:Select an answer
• True
• False

It was found that 432 women in the sample had a mammogram in the last two years.Test the appropriate hypotheses using a significance level of 0.01.

• H
• 0
• :
• H0:
• Select an answer
• p
• p
• ?
• <
• =
• >
• H
• a
• :
• Ha:
• Select an answer
• p
• p
• ?
• <
• >
• =decision rule: rejectH
• 0
• H0
• if probability?
• >
• <
• Test Statistic: z =(Note: round the z-score to two decimal places - carry at least four decimal places throughout all of your calculations)
• probability=(Note: round the probability to four decimal places)
• Decision:Select an answer
• Reject H
• Fail to reject H
• Conclusion: At the 0.01 level, thereSelect an answer
• is not
• is
• significant evidence to conclude the percentage of women 40 or older who have had a mammogram in the last two years isSelect an answer
• less than
• different than
• greater than
• 66.8%.

Note:If this question is reattempted, new numbers will be generated - be sure to work the entire problem again.