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sashaice [31]
3 years ago
9

In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of 25 pieces of carry-on lugga

ge was collected and weighed. the average weight was 18 pounds. assume that we know the standard deviation of the population to be 7.5 pounds. determine the standard error of the mean.
a. 1
b. 1.5
c. 2
d. 2.5
Mathematics
1 answer:
Fynjy0 [20]3 years ago
6 0
To find the standard error, divide the standard deviation by the square root of the sample size

standard deviation = 7.5
sample size = 25......sqrt 25 = 5

standard error = 7.5 / 5 = 1.5 <==
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Answer:

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Step-by-step explanation:

take all the number and subtract them

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7 0
2 years ago
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kenny6666 [7]

Answer:

y = - 2x + 18

Step-by-step explanation:

Step 1:

y = mx + b          Slope Intercept Form

Step 2:

y = - 2x + b         Input Slope Value

Step 3:

0 = - 2 ( 9 ) + b           Input x and y values

Step 4:

0 = - 18 + b        Multiply

Step 5:

b = 18          Add 18 on both sides

Answer:

y = - 2x + 18

Hope This Helps :)

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2 years ago
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stiv31 [10]

Answer:

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Step-by-step explanation:

10x10x10x10x10= 100000

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2 years ago
Ship A and Ship B are 120 km apart when they pick up a distress call from another boat. Ship B estimates that they are 70 km awa
oksian1 [2.3K]

Answer:

147.5 km and 64.4 km

Step-by-step explanation:

a=120  km

b=70  km

β=28 degrees ( ∘)

 

b^2=(a^2)+(c^2)−2ac*cosβ  

70^2 =(120^2 )+(c^2)−2⋅ 120⋅ c⋅ cos(28∘ )  

 (c^2 ) −211.907c+9500=0  

 

note p, q, and r are replacement variables in the Pythagorean theorem since a, b, and c are already in use

p=1;q=−211.907;r=9500  

D=(q^2 ) −4pr=(211.907^2 )−4⋅1⋅9500=6904.75561996  

D>0  

 

c_{1,2}  =   (−q±  \sqrt{D}   )/2p=(211.91±\sqrt{6904.76})/2

​c_{1,2}  =105.95371114±41.5474295834  

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c_{1}=147.501140726  

c_{2}=64.4062815596  

5 0
3 years ago
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I used Excel to calculate the pH values and draw the graphs (see the Figure).

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The points at which pH = 0 and pH = 1 are indicated by the large red dots.

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When x = 0.5, pH ≈0.30. The point is indicated by the red diamond.

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This function has no y-intercept, because log(0) is undefined.

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f(0) = -log(0 + 1) = -log(1) = 0

This function has a y-intercept at (0,0).

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3 0
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