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Part 1 of 2 O Points: 0 of 1 K The brain volumes (cm ) of 50 brains vary from a low of 914 cm to a high of 1496 cm . Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 164.5 cm , assuming the estimate is accurate if it is within 15 cm. The estimated standard deviation is cm3. (Type an integer or a decimal. Do not round.)
question david is an insurance broker who believes that the probability of making a sale is 0.3.a find the mean and
A study wants to look at the correlation between sugar consumption and the development of cavities. What is the sample correlation coefficient? What type of correlation does this represent
Two balls are drawn from a bag containing 3 white balls and 2 red balls. If the first ball is replaced before the second is drawn.
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
a) Make a list of questions one might like to ask about this situation and for which the data collected provide some information.
Suppose that the differential brightness B of a certain star has an unknown value, and that it is desired to test the following simple hypotheses:
Verify that the significance level associated with the main effect for factor A is less than .001 but that you get a highly non-significant result for factor B and the hypothesis of no interaction.
A certain class has 20 students, and meets on Mondays and Wednesdays in a classroom with exactly 20 seats. In a certain week, everyonein the class attends.
A random sample of 50 recent patient records at a clinic shows that the average billing per visit was $53.01 and the standard deviation was $16.48.
Suppose that X is normally distributed with mean 110 and standard deviation 30. A) What is the probability that is greater than 149.3
Assume that we randomly select 12 teachers who have recently left their profession. Find the probability that at least 4 of them were laid off.
Excited by the recent warm weather Jill and Kelly are doing spring cleaning at their apartment. Jill takes an exponentially distributed amount of time.
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