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Horse pregnancies are longer. Bigger animals tend to carry their young longer before birth. The length of horse pregnancies from conception to birth varies according to a roughly Normal distribution with mean 336 days and standard deviation 3 days. Use the 68-95-99.7 rule to answer the following questions.
(a) Almost all (99.7%) horse pregnancies fall in what range of lengths?
(b) What percent of horse pregnancies are longer than 339 days?
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
The ratings discussed in Problem 3 were constructed because the company felt that the moisture levels in the raw material were causing them to have problems in their plant. The data set rat ings2 . txt contains both the ratings and the correspondi..
Discuss briefly. Is eyewitness evidence unreliable? What's missing from the story?
How large a sample would be necessary to estimate the population proportion with a margin of error of 0.05 at 95% confidence?
What are the steps of testing a hypothesis for two populationmeanswith independent and dependent samples? Provide a workplace or business related example
An experiment involves 17 participants. From these, a group of 5 participants is to be tested under a special condition. How many groups of 5 participants can be chosen, assuming that the order in which the participants are chosen is irrelevant?
one percent of women at age forty who participate in routine screening have breast cancer prevalence. eighty percent of
Describe whether statements regarding statistical significance are true or false. When your results are found to be statistically significant, can one conclude that they will have a meaningful effect in the clinic.
As part of the National Health and Nutrition Examination Survey, the Department of Health and Human Services obtained self-reported heights and measured heights for males aged 12-16. All measurement is in inches. Listed below are sample results.
he length of time a person spends waiting in a physician's office for an appointment can be a frustrating experience. The results below are the responses of internists from two multispecialty group practices to the following question:
Of the 250 students in a blind taste test, 150 (60%) preferred Milwaukee's Best over Natural Light. Then the 90% confidence interval for the student population proportion preferring Milwaukee's Best is:
Child s play. In a board game you determine the number of spaces you may move by spinning a spinner and rolling a die.
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