A group conducted a randomized experiment to see if hormone therapy was helpful for post-menopausal women....
A group conducted a randomized experiment to see if hormone therapy was helpful for post-menopausal women. The women were randomly assigned to receive a hormone or a placebo. After 5 years, 104 of the 8513 on the hormone therapy developed cancer and 95 of the 8158 in the placebo group developed cancer. Is this a significant difference?
a. State the assumptions and the hypotheses. What assumptions about the two samples are necessary for the significance test?
b. Let p represent the probability that someone gets cancer. Let p1 represent the probability that a person who received hormone therapy got cancer, and let p2 represent the probability that a person who received a placebo got cancer. Write the claim as a hypothesis test. Choose the correct null and alternative hypotheses below.
c. Find the test statistic.
d. Find the P-value.
e. What is your conclusion, for a significance level of 0.01?
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A group conducted a randomized experiment to see if hormone
therapy was helpful for post-menopausal women....
#3 A group conducted a randomized experiment to see if hormone therapy was helpful for post-menopausal...
#3
A group conducted a randomized experiment to see if hormone therapy was helpful for post-menopausal women The women were randomly assigned to receive a hormone or a placebo After 5 years, 119 of the 8589 on the hormone therapy developed cancer and 83 of the 8437 in the placebo group developed cancerIs this a significant difference? Complete parts a through c below a. State the assumptions and the hypotheses What assumptions about the two samples are necessary to be...
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P In a randomired, placebo control study 1007 h y women 5 years of age or...
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11.1
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An article reported on the results of an experiment in which half of the individuals in a group of 70 postmenopausal overweight women were randomly assigned to a particular vegan diet, and the other...
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f=25.09 is wrong.
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It is well known that a placebo, a fake medication or treatment, can sometimes have a positive effect just because patients often expect the medication or treatment to be helpful. An article gave examples of a less familiar phenomenon, the tendency for patients informed of possible side effects to actually experience those side effects. The article cited a study in which a group of patients diagnosed with benign prostatic hyperplasia is randomly divided into two subgroups. One subgroup of...
#3
A group conducted a randomized experiment to see if hormone therapy was helpful for post-menopausal women The women were randomly assigned to receive a hormone or a placebo After 5 years, 119 of the 8589 on the hormone therapy developed cancer and 83 of the 8437 in the placebo group developed cancerIs this a significant difference? Complete parts a through c below a. State the assumptions and the hypotheses What assumptions about the two samples are necessary to be...
P In a randomired, placebo control study 1007 h y women 5 years of age or older were randomly divided into two groups The women in group received 100 mg of the day, the women in group 2 received placebo every other day The women were monitored for 10 years to determine they experienced a cardiovascular event such as a heart attack of the o the r 10 penced a heart attack of the 519 women in the placebo group...
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...
11.1
A survey asked, "How many tattoos do you currently have on your body?" Of the 1211 males surveyed, 193 responded that they had at least one tattoo. Of the 1089 females surveyed, 147 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let P, represent the...
An article reported on the results of an experiment in which half of the individuals in a group of 70 postmenopausal overweight women were randomly assigned to a particular vegan diet, and the other half received a diet based on National Cholesterol Education Program guidelines. The sample mean decrease in body weight for those on the vegan diet was 5.7 kg, and the sample SD was 3.5, whereas for those on the control diet, the sample mean weight loss and...
===========================================
f=25.09 is wrong.
Olestra is a fat substitute approved by the FDA for use in snack foods. Because there have been anecdotal reports of gastrointestinal problems associated with olestra consumption, a randomized, double-blind, placebo-controlled experiment was carried out to compare olestra potato chips to regular potato chips with respect to GI symptoms. Among 500 individuals in the TG control group, 16.6% experienced an adverse GI event, whereas among the 500 individuals in the olestra treatment group, 14.8% experienced such...
========================================
It is well known that a placebo, a fake medication or treatment, can sometimes have a positive effect just because patients often expect the medication or treatment to be helpful. An article gave examples of a less familiar phenomenon, the tendency for patients informed of possible side effects to actually experience those side effects. The article cited a study in which a group of patients diagnosed with benign prostatic hyperplasia is randomly divided into two subgroups. One subgroup of...
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