Mathematics, 06.05.2020 22:18 toxic12396green24
An inventor has developed a new, energy-efficient lawn mower engine. He claims that the engine will run continuously for 5 hours (300 minutes) on a single gallon of regular gasoline. Suppose a simple random sample of 45 engines is tested. The engines run for an average of 290 minutes, assume the population standard deviation is 20 minutes. Test the null hypothesis that the mean run time is at least 300 minutes. Use a left sided test. Use a 0.025 level of significance.
a) Find the critical value for this test.
b) Find the test statistic
c) Find the p-value for this test.
d) My conclusion is :
e) Is the test statistically significant?
f) Could I use a symmetric confidence interval to solve this problem and if so what is it?
Answers: 2
Mathematics, 21.06.2019 16:30
To which set of numbers does the number –5 belong? select all that apply. integers natural numbers rational numbers real numbers whole numbers
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Mathematics, 21.06.2019 20:40
If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32
Answers: 1
An inventor has developed a new, energy-efficient lawn mower engine. He claims that the engine will...
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