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Cicadas are flying, plant eating insects. One particular species, the 13-year cicadas, spends five juvenile stages in underground borrows. During the 13 years underground, the cicdas grow from approximately the size of a small ant to nearly the size of an adult cicada. The adult body weighs (BW) in frams and wing length (WL) in millimeters are given for three different species of these 13 year cicadas in the following table. BW WL Specie.15 28 Tredecila.29 32 Tredecim.17 27 Tredecim.18 30 Tredecula.39 35 Tredecim.26 31 Tredecim.17 29 tredecassini.16 28 tredecassini.18 29 Tredecila.21 27 tredecassini.15 30 Tredecila.17 27 Tredecila.13 27 Tredecassini.17 29 Tredecassini.23 30 Tredecassini.12 22 Tredecim.14 25 Tredecassini.14 28 Tredecassini.28 25 Tredecassini.12 28 Tredecim.26 30 Tredecila.19 30 Tredecila.20 30 Tredecassini.14 23 TredecilaA. Draw a scatter diagram with body weight as the independent variable and wing length as the dependent variable. Find the equation of the line of best fit. B. Is body weight effective predictor of wing length for a 13 year cicada? Use a .05 level of significance. C. Give a 90% confidence interval for the mean wing length for all .20 gram cicada body weights.
In a study comparing individual performance with group performance
the observed rate of drinking was the same in both cases although the sample size of the latter was twice as big. The critical region {X ¯>c} and p-value for the two cases are respectively?
Let 3 trails (they may not be independent), each of which is either success or not. Let X denotes number of successes. Assume E[X] = 1.8. Determine the largest possible value of P(X=3)?
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
Restaurateur Danny Valentine is evaluating two, sites, Raymondville and Rosenber, for his next restaurant. Denny suspects that Raymondville residents (population 1) dine out more often (number of times per month) than Rosenberg residents (populati..
By using the fact that Martha believes the treatment will decrease the amount of time to fall asleep, describe the null and alternate hypotheses.
Find the probability that 4 of the 5 committee members belong to a union.Find the probability using hypergeometric distribution.
Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee.
The average gas mileage of a certain model car is 29.0 miles. If the gas mileages are normally distributed with a standard deviation of 0.6 miles per gallon, find the probability that the car has a gas mileage of between 28.8 and 29.2 miles per ga..
What is them 98% confidence interval for the average number of minutes it takes to create a test question?
Determine the p-value and interpret its meaning and what assumptions do you have to make about the two populations in order to justify the use of the t test?
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
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