Find x. Multiple choice answers are below!
1 answer:
Answer:
Step-by-step explanation:
To find x, we can use the Pythagorean Theorem. As this triangle is made up of 2 right triangles. As the length of both right triangles is 10, the length of one will be 5.
Now that we have 2 sides of the right triangle, we can use the Pythagorean Theorem to solve for x
Lastly, we can simplify this radical to
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Answer:
Step-by-step explanation:
Hello!
To study the threshold of hering the researcher took a random sample of 80 male college freshmen.
The students underwent an audiometry test where a tome was played and they had to press a button when they detected it. The researcher recorded the lowest stimulus level at which the tone was detected obtaining a sample mean of X[bar]= 22.2 dB and a standard deviation of S= 2.1 dB
To estimate the population mean, since we don't have information about the variable distribution but the sample size is greater than 30, you can use the approximation of the standard normal distribution:
X[bar] ±
Where the semiamplitude or margin of error of the interval is:
d=
Using a 95% level
d= 1.965 *
d= 0.46
The point estimate of the population mean of the threshold of hearing for male college freshmen is X[bar]= 22.2 db
And the estimation using a 95%CI is [21.74;22.66]
I hope this helps!