What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? Drag and drop the values into the
boxes to show the relative frequencies.
1 answer:
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Answer:
The mean water hardness of lakes in Kansas is 425 mg/L or greater.
Step-by-step explanation:
We are given the following data set:
346, 496, 352, 378, 315, 420, 485, 446, 479, 422, 494, 289, 436, 516, 615, 491, 360, 385, 500, 558, 381, 303, 434, 562, 496
Formula:
where are data points,
is the mean and n is the number of observations.
Sum of squares of differences = 175413.76
Population mean, μ = 425 mg/L
Sample mean, = 438.36
Sample size, n = 25
Alpha, α = 0.05
Sample standard deviation, s = 85.49
First, we design the null and the alternate hypothesis
We use one-tailed t test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
The calculated t-statistic is greater than the critical value, we fail to reject the null hypothesis and accept it.
Thus, the mean water hardness of lakes in Kansas is 425 mg/L or greater.
Answer: The answer is: " 72 words per minute. "
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Step-by-step explanation:
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This is a "unit rate" problem.
We want to solve for/ find the number of words PER single minute.
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Given 48 words per (2/3) minute;
How many words per (one) minute?
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The answer is {48 ÷ (2/3) } words per minute:
Note: dividing by a number is the same as multiplying by the reciprocal (inverse) of that particular number:
Hence:
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The answer is {48 * (3/2) } words per minute:
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Write as:
" " ;
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The "48" can be changed to "24" ; and the "2" can be changed to "1" ;
→ {Since: "48 ÷ 2 = 24 "} ;
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And we have:
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" " ;
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The answer is: " 72 words per minute ."
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Hope this is helpful to you!
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