Mathematics, 09.08.2021 21:50 christensenlandon15
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 6.56.5 parts/million (ppm). A researcher believes that the current ozone level is not at a normal level. The mean of 88 samples is 7.07.0 ppm with a standard deviation of 0.70.7. Assume the population is normally distributed. A level of significance of 0.10.1 will be used. Find the value of the test statistic. Round your answer to three decimal places.
Answers: 2
Mathematics, 21.06.2019 17:20
Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x
Answers: 1
Mathematics, 21.06.2019 19:00
Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable
Answers: 3
Mathematics, 21.06.2019 19:00
Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?
Answers: 3
Mathematics, 21.06.2019 19:30
Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?
Answers: 1
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone...
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