I don't understand what it is asking

Mathematics

1 answer:

Andreyy892 years ago

4 0

Step-by-step explanation:

For the first picture, we can see that as the multiplier of x gets larger (1/2 vs 1 vs 2), the line gets steeper

Next, we can see that as more stuff is added to x, the higher it goes. For example, y=x+2 is higher than y=x for all values of x

Lastly, we can see that multiplying x by a negative number can completely shift the positioning of the line, as seen by comparing y=-x to y=x

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hram777 [196]

Answer:

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Step-by-step explanation:

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2 years ago

7 . Sampling distribution of the difference between two means A statistician is interested in the effectiveness of a weight-loss

UkoKoshka [18]

Answer:

0.229

Step-by-step explanation:

Given that the difference between the two sample means follows anormal distribution with a mean of11.00 and standard deviation equal to1.4387

A statistician is interested in the effectiveness of a weight-loss supplement. She randomly selects two independent samples. Individuals in the first sample of size n1 = 24 take the weight-loss supplement. Individuals in the second sample of size n2 = 21 take a placebo. Individuals in both samples follow identical exercise and diet programs. At the end of the study, the statistician measures the weight loss (in percent) of each participant.

We find that mean difference actual = 13-2 = 11

Probability that difference >12 =P(Z> $\frac{12-11}{1.3487} \\$ )