The mean length a particular species of fish should be 9.7 inches. the supervisor of a fish hatchery measures the length of a simple random sample of the fish every week after hatching to track their growth. if their average length is too short or too long, they are not maturing properly and further tests must be done to determine the cause. she randomly selects 30 fish from those hatched five weeks ago and observes a mean length of 10.1 inches and a standard deviation of 1.8 inches. the value of the test statistic is (give the answer rounded to 2 decimal places.)

What is the length and width of a 84.5 square foot rug? will mark

Mrs. chibas is making chocolate chip cookies for her daughter's class. she bought a tub of chocolate chip cookie dough that contained 57.6 ounces of dough. if each cookie needs 1.2 ounces of dough, how many cookies can she make

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr