Using traditional methods it takes 9898 hours to receive an advanced flying license. a new training technique using computer aided instruction (cai) has been proposed. a researcher used the technique on 100 students and observed that they had a mean of 97 hours. assume the population variance is known to be 49.
1. is there evidence at the 0.05 level that the technique performs differently than the traditional method?
2. find the value of the test statistic. round your answer to two decimal places.

1. Yes, the technique performs differently than the traditional method.

2. 0.20

Step-by-step explanation:

The null hypothesis  

H0 = mean is 97 hours

Ha = mean > 97

Let´s make the z test

z = (x – mean) / standard deviation / √sample size

z = (97 – 98) / 49 / √100

z = -0.204

Confidence level of 95%, that means the the siginficance level α is 1 – p

α = 1 – 0.95 = 0.05

Z(α /2) = Z(0.05/2) = Z (0.025)

Using a z table Z = 1.96

since our calculated z values is smaller than the critical value, the null hypothesis can be rejected. Sample mean is different from sample population so the technique performs differently than the traditional method.

need more info

step-by-step explanation:

the length of o'p' is .

step-by-step explanation:

it is given that the quadrilateral m'n'o'p' is the image of quadrilateral mnop after dilation.

the center of dilation is origin and the scale factor is 1.5.

in dilation the image and preimge are similar figures. it means the sides of image and preimage are proportional.

the scale factor is defined as

the scale factor is 1.5.

multiply both sides by op.

note: if the value of op is given, then multiply the value of op with 1.5 to get the length of side o'p'.

therefore length of o'p' is .