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!
Answer:
29.9
Step-by-step explanation:
Divide the earnings by the time.
179.4/6 = 29.9
418.6/14 = 29.9
867.1/29 = 29.9
Answer:
Relationship between a linear pair and supplementary angles is " If two angles form a linear pair then they are supplementary."
Step-by-step explanation:
Supplementary angles are two angles whose sum is 180°.
Linear pair is a pair of two angles that forms a straight line.
We have to find the relationship between a linear pair and supplementary angles.
Since A linear pair forms a straight line so angle formed at any point on the straight line is 180°, thus forms supplementary angles.
Thus, Relationship between a linear pair and supplementary angles is " If two angles form a linear pair then they are supplementary."
Answer:
h(x) = 11/(x -4)
Step-by-step explanation:
The domain of m(x) is restricted to x≠1. That means the domain of m(n(x)) must be restricted so that n(x)≠1, or x≠4.
The only offered choice with a domain restriction x≠4 is the 3rd choice:
h(x) = 11/(x -4)
