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Researchers tracked a population of 1,203,646 fruit flies, counting how many died each day for 171 days. Here are three time plots offering different views of these data. One shows the number of flies alive on each day, one the number who died that day, and the third the mortality rate - the fraction of the number alive who died. On the last day studied, the last 2 flies died, for a mortality rate of 1.0.
a) On approximately what day did the most flies die?
b) On what day during the first 100 days did the largest proportion of flies die?
c) When did the number of fruit flies alive stop changing very much from day to day?
a.nbspthe random variable x is the number of siblings of a student selected at random from professor appiahs
The mean tensile strength for the bolts tested is 1385 pounds. Formulate and carry out a hypothesis test to examine the possibility that the bolts in the shipment might not be genuine.
Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
Test the hypothesis that there is no difference between the means of retailers (α= .05). Select a multiple comparison test, if necessary, to determine which groups differ in mean sales (α= .05).
for boys the average number of absences in the first grade is 15 with a standard deviation of 7 for girls the average
Burning calories with exercise. Table 28.13 provides data on speed and calories burned per hour for a 175- pound male using two different treadmills (a Cybex and a LifeFitness) at inclines of 0%, 2%, and 4%
question a group of 11 people are going to the movies one saturday. adult tickets cost 10.50 each and child tickets
A sociologist wants to describe if the life expectancy of people in Africa is lesser than the life expectancy of people in Asia.
Compute the probability that student eats at fast food restaurant 2 or more times per week?
A decile represents a point in the data: a. At a 10 per cent value
Southern Sporting Good Company makes basketballs and footballs. Each product is produced from two resources rubber and leather. The resource requirements for each product and the total resources available are as follows: a. State the optimal solu..
1.a forester wishes to predict the volume in cubic feet of usable lumber in a certain species of tree using the height
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