The appropriate hypothesis test for this question is the two proportions test. As the name implies, it is often used to compare existing percentages between two groups. The raw data behind the percentages must be available as the sample size becomes crucially important in determining the test statistics.
The test statistic of the two-proportion test is the Z value. When the sample becomes very large, the Z value is governed under a normal function and is commonly known as the standardized Z value
Answer: Hand tools are necessary for daily activities.
Explanation:
The hand tools are useful for day to day activities they aid in pouring substances, holding things, mixing substances, cleaning and for other purposes. In a chemical laboratory the hand tools like test tube holders can help in holding the chemicals. In a medical laboratory the forceps can be useful in holding and cutting the sections without causing any harm to the hands. Hand tools avoid the direct contact with the microorganisms in medical laboratory thus protect against infections. Hand tools aid in surgical operations and they help in avoiding direct contact with the blood vessels and organs preventing contamination and infections.
Answer:
<h2>A. twice</h2>
Explanation:
Spring potential Energy is expressed as E = 1/2 ke²
k = spring constant
e = displacement of the string
If Spring A has a spring constant of 100 N/m and displacement of 0.2m, the spring potential energy will be;
= 1/2 * 100 * 0.2²
= 50 * 0.04
= 2Joules
If spring B has a spring constant of 200 N/m and displacement of 20m, the spring potential energy will be;
= 1/2 * 200 * 0.2²
= 100 * 0.04
= 4Joules
From the values gotten, it can be seen that the spring potential energy of spring B is twice that of A
Answer:
The graph appears to be in error.
The actual figure appears to be a rhombus with sides of 5 and 15 with a height of 5
The work done (F * S) is the area of the rhombus
1/2 * (5 +15) * 5 = 50 J
Answer:most likely E
Explanation:
Why would anybody do something after design there done with there work after that