Answer:
Explanation:
To find the percentage of cars averaged less than 62 mph calculate the corresponding z-score and use a standard normal cumulative probability table
<u>1. Z-score</u>
- x is the specific value of the random variable: 62mph
- μ is the mean of the population: 65mph
- σ is the standard deviation of the population: 5mph
Substitute and calculate
<u>2. Use of the table.</u>
The percentage of cars that averaged less than 62mph is given by the area under the curve to the left of z = -0.600.
From a standard normal cumulative probability table, the probability of z being less than -0.600 (which is equal to the probability of z being greater than 0.600) is 0.2743, which is 27.43%.
Thus, the conclusion is that 27.43% of the cars averaged less than 62mph.
Based on the information given, the alternative hypothesis will be that the observed variables have different effects on the decreasing rates of injury and absenteeism.
It should be noted that the alternative hypothesis suggests a statistical difference between the observed variables.
The question is about the effects of strength training, aerobic training, and yoga on decreasing rates of injury and absenteeism. In this case, the alternative hypothesis will be that the observed variables have different effects on the decreasing rates of injury and absenteeism.
Learn more about hypothesis on:
brainly.com/question/16931413
Constructive interference or just interference
The positive difference between the circumference of circle B and the circumference of circle A is 1. Thus, the correct option for this question is A.
<h3>What is the circumference of the circle?</h3>
The circumference of the circle may be defined as the total stretch of the boundary of the circle. The formula for calculating the circumference of the circle is as follows:
where, C = circumference of the circle.
π = the constant pie.
r = radius of the circle.
According to the question,
The circumference of the circle A = 2π (r+1).
The circumference of the circle B = 2π (r+2).
∴The positive difference between the circumference of circle B and the circumference of circle A is as follows:
2π (r+2) - 2π (r+1) = 1.
Therefore, the positive difference between the circumference of circle B and the circumference of circle A is 1. Thus, the correct option for this question is A.
To learn more about the circumference of the circle, refer to the link:
brainly.com/question/9782777
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