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ExtremeBDS [4]
3 years ago
8

Form a normally distributed population, a simple random sample of size 30 is taken. the mean of the sample is 144 and the standa

rd deviation of the sample is 12. which interval is the 90% confidence interval for the population mean?
Mathematics
1 answer:
Kisachek [45]3 years ago
3 0
The answer I think is D.
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Brainliest + points!<br><br> Please show your work!
valentinak56 [21]

Find two points where the line intersects with an x and y value that are whole numbers.


The line crosses (0,3) and (-2,-1)


The slope is the change in Y divided by the change in x.

The change in Y is -1 - 3 = -4

The change in x is -2 - 0 = -2


The slope becomes -4 / -2 which simplifies to 2



The answer is D.

7 0
3 years ago
HELPPPPP: The average high temperatures each month in Dallas, Texas are shown in the chart. What value represents the 3rd 3rd qu
Sloan [31]

Answer: 79

Step-by-step explanation:

Line up the numbers from least to greatest. 39, 42, 44, 51, 55, 62, 66, 72, 77, 81, 94, 86 Then find the Median. Look at the upper part of the data set and from there find the 3rd quartile.

5 0
3 years ago
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Your food costs are $5,500. Your total food sales are $11,000. What percent of your food sales do the food costs represent?
White raven [17]

Answer:

50

Step-by-step explanation:

5,500 is 50 percent of 11,000 :)

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4 0
3 years ago
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Solve the following system of equations:
Vinil7 [7]
The answer is (12, -1)
Work in pic:

8 0
3 years ago
In the table, x and y are in a proportional relationship. у 3 -5.4 5 -9.0 9 -16.2 12 -21.6 Let x be the independent variable. Wh
aev [14]

Answer:

A. -1.8

Step-by-step explanation:

If x is the independent variable and y is the dependent variable, therefore constant of proportionality would be:

k = y/x

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k = y/x = -5.4/3

k = -1.8

4 0
3 years ago
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