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mina [271]
3 years ago
13

Consider the following: A medical researcher wants to determine the effects of pH (a measure of alkalinity or acidity, with pure

water having a pH of 7) on the growth of a bacteria culture. The data provided to you below represents the measurements of different cultures (in the thousands of bacteria) after 8 hours.

Mathematics
1 answer:
natita [175]3 years ago
4 0

Answer:

See below

Step-by-step explanation:

<h3>Continuation of the question</h3>

<u>Data in the table:</u>

<u>PH             4       5     6     7     8    9     10     11 </u>

<u>Bacteria    116   120  131  136  141  151  148   163</u>

  • <em>Create a scatter plot to represent the data: Based on the data and your scatter plot, what do you think a good linear function would be to represent the data?</em>
<h3>Solution</h3>

<em>See attached for scatter plot</em>

We can see the chart is close to linear function. Let's build one based on data in the table

<u>The line will be in the form of:</u>

  • y = mx + b

<u>If we use two points and get the equation</u>

  • (4, 116) and (8, 141)

<u>Finding the slope:</u>

  • m = (141-116)/(8-4) = 25/4 = 6.25

<u>Then, finding y-intercept:</u>

  • 116 = 6.25*4 + b
  • b = 116 - 25 = 91

<u>So the line is:</u>

  • y = 6.25x + 91

<em>Note: This is approximate best fit graph and it is attached as well. Exact formula for the line is built by using different method and is very close to the one above</em>

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3 years ago
Simplify 12(x-4)+4(x+7)
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Expand

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Collect like terms

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3 years ago
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Step-by-step explanation:

a.

mean = 266

sd = 14

cumulative probability = 0.01 so the standard score = -2.33 and 2.33 to the right and left

we find X-upper and X-lower

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X-upper = 266+2.33*14 = 298.62

Between 233.38 and 298.62

we have sample size = 35

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X-upper = 266+2.33*14/√35 = 271.5

Between 260.49 and 271.5

b. cumulative probaility = 0.25

standard score = 1.96 to the right and left

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d. we will have critical values at 1.00 and -1.00

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with sample size = 44

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x-upper = 265+1x16/√44 = 267.41

Between 262.59 and 267.41

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3 years ago
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