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Reptile [31]
3 years ago
6

Help quick! The table below shows the water temperature at certain depths of a lake. Using an logarithmic model, write an equati

on for the curve of best fit, then estimate the depth of water at a temperature of 50 degrees F.
Depth Temp
(ft) (°F)
2 86
12 78
14 75
45 71
68 68

A) 1,256 ft
B) 1,679 ft
C) 2,364 ft
D) 2,634 ft
Mathematics
2 answers:
Norma-Jean [14]3 years ago
5 0

Answer:

we need the graph lol

Step-by-step explanation:

Morgarella [4.7K]3 years ago
5 0

Answer:

we need a graph

Step-by-step explanation:

have a good day

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Answer:

13

Step-by-step explanation:

I think the turtle would be 13 and 1/3 because we know that the turtle is half as old as the parrot. So if we divide 10 by 3/4 we can get how old the turtle is now

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What would the angle of w equal?
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Some transportation experts claim that it is the variability of speeds, rather than the level of speeds, that is a critical fact
scZoUnD [109]

Answer:

Explained below.

Step-by-step explanation:

The claim made by an expert is that driving conditions are dangerous if the variance of speeds exceeds 75 (mph)².

(1)

The hypothesis for both the test can be defined as:

<em>H</em>₀: The variance of speeds does not exceeds 75 (mph)², i.e. <em>σ</em>² ≤ 75.

<em>Hₐ</em>: The variance of speeds exceeds 75 (mph)², i.e. <em>σ</em>² > 75.

(2)

A Chi-square test will be used to perform the test.

The significance level of the test is, <em>α</em> = 0.05.

The degrees of freedom of the test is,

df = n - 1 = 55 - 1 = 54

Compute the critical value as follows:

\chi^{2}_{\alpha, (n-1)}=\chi^{2}_{0.05, 54}=72.153

Decision rule:

If the test statistic value is more than the critical value then the null hypothesis will be rejected and vice-versa.

(3)

Compute the test statistic as follows:

\chi^{2}=\frac{(n-1)\times s^{2}}{\sigma^{2}}

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The test statistic value is, 68.184.

Decision:

cal.\chi^{2}=68.184

The null hypothesis will not be rejected at 5% level of significance.

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The variance of speeds does not exceeds 75 (mph)². Thus, concluding that driving conditions are not dangerous on this highway.

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