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hoa [83]
3 years ago
9

Which of the following 95% confidence intervals would lead us to reject Hp =0.30 in favor of

Mathematics
1 answer:
lukranit [14]3 years ago
7 0
The correct answer is letter C
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The histogram presents the compressive strengths of a sample of concrete blocks hardened for 28 days.
dusya [7]

Answer:

The question is not complete but I have uploaded the image to complete the question.

The missing rectangle has a relative frequency of 0.15, and this is the same as the height.

Step-by-step explanation:

Let us define what a frequency and relative frequency are

The frequency of a datum is the number of times a given item (datum) appears in the data set.

While the relative frequency is the fraction or proportion of times taken from the whole in which an item/datum occurs.

So, from the image I uploaded, the relative frequency column represents the height of the histogram. Let the height of the missing rectangle be <em>x.</em>

Therefore the heights of the rectangles written from left to right are 0.05, 0.1, 0.15, <em>x, </em>0.25, 0.2, and 0.1.

From the definition of relative frequency, the total sum of relative frequency is 1, if represented as decimals or fractions it can either be expressed in percentage, or decimal (fractions). In this question, it is represented in decimal, and the sum of all the relative frequency is 1.

0.05 + 0.1 + 0.15 + <em>x </em>+ 0.25 + 0.2 + 0.1 = 1 ;

0.85+ <em>x </em>=1

Therefore, <em>x </em>= 1 - 0.85= 0.15

3 0
3 years ago
B. What is the total cost for all three people?​
STALIN [3.7K]
What is the problem
5 0
3 years ago
PLS answer quick
Stolb23 [73]

The formula to find the volume of the composite solid is: C. V = πr²h + ⅔πr³.

<h3>How to Find the Volume of a Composite Solid?</h3>

The volume of the composite solid in the image given = Volume of cylinder + volume of hemisphere.

Volume of cylinder = πr²h

Volume of hemisphere = ⅔πr³

Therefore, formula to find the volume is: C. V = πr²h + ⅔πr³.

Learn more about volume of composite solid on:

brainly.com/question/23642076

#SPJ1

7 0
2 years ago
The two trapezoids shown below are similar . What is the length of x?
dangina [55]
The length of x is 3. Since the two trapezoids are similar. In the second trapezoid the top is half of 10. so it would be logical for x to be 3
7 0
3 years ago
Read 2 more answers
A wagon train on the Oregon Trail averaged 17.3 miles each day across the plains. How far was the wagon train able to travel in
Makovka662 [10]

17.3 x 7 = 121.1 per week

121.1 x 4 = 484.4

5 0
3 years ago
Read 2 more answers
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