A manufacturer of small engines concerned with the issue of noise pollution developed a new engine that would, it was hoped, be quieter than the standard model. Forty-one of the new models were tested for noise level and compared with 65 of the standard models. The results are given below with noise measured in decibels. (The higher the decibel is, the higher the noise level is ). Assume that the noise levels of both the standard and the new model engines are normally distributed. Sample Size Sample Mean (Decibels) Sample Standard deviation (decibels)
Standard Model 65 84 11.6
New Model 41 72 9.2
At 5 % level of significance, test the claim (using test of hypothesis procedure) that the new model is significantly quieter than the old model. Use P-value method. Show all four steps and showcompletework. UseP-ValueMethod.

is should be y = 5x

step-by-step explanation:

correct me if im wrong

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75