Let the sample size of the television tube brightness experiment be ten and the sample mean and sample standard deviation be 367.2 microamps and 16.3 microamps, respectively. Suppose that the design engineer claims that this tube will require at least 350 microamps of current to produce the desired brightness level. Choose an appropriate hypothesis to test. , Find the P-value for this test. 0.0025 < P-value < 0.0050 0.025 < P-value < 0.050 0.25 < P-value < 0.50 0.0005 < P-value < 0.0010 With a significance level of For this test, we assumed that the underlying distribution of the data is a t-distribution.

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.