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Svetlanka [38]
2 years ago
15

HELP and Happy valentines T-T

Mathematics
1 answer:
alexandr402 [8]2 years ago
4 0

Answer:you supposed to add me ok and invite me armstrongtamarion

Step-by-step explanation:

its because i need 50 points

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Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and standard deviation of 1.00deg
IrinaVladis [17]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is the readings on thermometers. This variable is normally distributed with mean μ= 0 degrees C and standard deviation σ= 1.00 degrees C.

The objective is to find the readings that are in the top 3.3% of the distribution and the lowest 3.3% of the distribution.

Symbolically:

The lower value P(X≤a)=0.033

Top value P(X≥b)=0.033

(see attachment)

Lower value:

The accumulated probability until "a" is 0.03, since the variable has a normal distribution, to reach the value of temperature that has the lowest 3.3%, you have to work under the standard normal distribution.

First we look the Z value corresponding to 0.033 of probability:

Z= -1.838

Now you reverste the standardization using the formula Z= (a-μ)/δ

a= (Z*δ)+μ

a= (-1.838*1)+0

a= -1.838

Top value:

P(X≥b)=0.033

This value has 0.033 of the distribution above it then 1 - 0.033= 0.967

is below it.

You can rewrite the expression as:

P(X≤b)=0.967

Now you have to look the value of Z that corresponds to 0.967 of accumulated probability:

b= (Z*δ)+μ

b= (1.838*1)+0

b= 1.838

The cutoff values that separates rejected thermometers from the others are -1.838 and 1.838 degrees C.

I hope it helps!

5 0
3 years ago
D. 10 + 11k can someone plzz help meeee plzzzz
torisob [31]

Answer:

(A).  \frac{15}{2} + \frac{33}{4} <em>k</em>

Step-by-step explanation:

\frac{3}{4} × 2(2 + 4k + 3 + \frac{3}{2} k ) = \frac{3}{2} ( 5 + \frac{11}{2} k ) = \frac{15}{2} + \frac{33}{4} k

8 0
3 years ago
13 divided by 1209 please help
loris [4]
The answer is 93 It’s 1209 divided by 13 not 13 divide by 1209 ;) hope this helps ! Because when we’re dividing the number get smaller and when we multiplying the number gets bigger , have a nice day !
5 0
1 year ago
Help me pleasee and also could you explain bc im so confused​
Rufina [12.5K]
What the person said up above should be correct!
3 0
2 years ago
F(x) =x^2+6x and g(x)=7-x find (f-g)(x) and (f-g)(9)
liq [111]
(f-g)(x) = x²+6x - (7-x)
(f-g)(x) = x² + 6x - 7 + x
(f-g)(x) = x² + 7x - 7

(f-g)(9) = 9² + 7*9 - 7
(f-g)(9) = 81 + 63 - 7
(f-g)(9) = 137
8 0
3 years ago
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