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raketka [301]
3 years ago
13

The 1990s and early 2000s could be considered the steroids era in a certain professional baseball​ league, as many players have

admitted to using the drug to increase performance on the field. If a sports writer wanted to compare home run totals from the steroids era to an earlier​ decade, say the​ 1960s, explain why this would be an observational study. Could the writer conclude that it was the steroids that caused the increase in home​ runs? Why or why​ not?
Mathematics
1 answer:
serg [7]3 years ago
4 0

Answer:

Step-by-step explanation:

This could be an observational study because an experiment was not carried out by the research to further verify this hypothesis. Individuals are observed and data is collected from such observation. No effort is made by the researcher to affect the outcome of such results.

This study alone is not enough to conclude about a cause and effect relationship between steroids and the increase in home​ runs as thus study is not randomized and cant control other factors or links bringing about this result.

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Please help finals are tomorrow
Bogdan [553]
ΔQTR and ΔSTP are similar triangles. The corresponding sides of similar triangles are the same length.
TR = PT
TS = QT

Input the algebraic expression to make an equation system
PT = TR
y = 2x - 1 <em>(first equation)</em>

TS = QT
6x + 13 = 5y
6x - 5y = -13  <span><em>(second equation)</em>

</span>Using subtitution method, subtitute y with 2x - 1 from first equation into the second equation, to find the value of x
6x - 5y = -13
6x - 5(2x - 1) = 13
6x - 10x + 5 = 13
-4x + 5 = 13
-4x = 13 - 5
-4x = 8
  x = 8/-4
  x = -2

Find y with subtituting x with -2 in the first equation
y = 2x - 1
y = 2(-2) - 1
y = -4 - 1
y = -5

Answer:
x = -2
y = -5
6 0
3 years ago
What’s the correct answer for this question?
stepladder [879]

Answer:

6 pounds and 15 ounces

Step-by-step explanation:

Since 1 pound is equal to 16 ounces you divide 111 by 16 and get 6 remainder 15 which is basically 6 pounds and 15 ounces. Hope this helps!

8 0
2 years ago
Write the point-slope form of the equation of the line that passes through the points (-8, 2) and (1, -4). Include your work in
Tatiana [17]
Slope = (2+4)(-8 -1) = 6/-9 = - 2/3

<span>point-slope form of the equation
</span>
y - 2 = -2/3(x + 8)

3 0
2 years ago
Read 2 more answers
Consider the following hypothesis test: H 0: 20 H a: &lt; 20 A sample of 50 provided a sample mean of 19.4. The population stand
goblinko [34]

Answer: p-value is 0.016.

Step-by-step explanation:

Since we have given that

H_0:\mu=20\\\\H_a:\mu

Sample mean = 19.4

Sample size n = 50

Standard deviation = 2

We need to find the test statistic value which is given by

z=\dfrac{\bar{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\\\z=\dfrac{19.4-20}{\dfrac{2}{\sqrt{50}}}\\\\\\z=\dfrac{-0.6}{0.28}\\\\z=-2.14

p-value is given by

P(Z>Z_{critical})\\\\=P(Z>-2.14)\\\\=0.016

Hence, p-value is 0.016.

8 0
2 years ago
*WILL MARK BRAINLIEST*
devlian [24]
A. multiply all the numbers together to find the possible outcomes

4 x 4 = 16

There are 16 different jacket-shirt outfits Ardell have.

They will not be the same color = 4 x 3

4 x 3 = 12

12/16 = 0.75, or a 75% chance they will not be the same color


hope this helps
6 0
3 years ago
Read 2 more answers
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