Answer:
B. 40
Step-by-step explanation:
What do you understand by sample size; a sample size is a little portion of a large number we which to investigate. Imagine we wanted to know the electricity consumption of people in a town of 200million people sometimes we could do that be investigating that of 50million especially when you know the conditions would be no different from others. In this sense the sample size is 50 million because that's the one we are investigating.
Similarly our concern of interest for investigation is 40, so that's the sample size.
Answer:
The required null and alternative hypotheses are and respectively.
Step-by-step explanation:
Consider the provided information.
If there is no statistical significance in the test then it is know as the null which is denoted by , otherwise it is known as alternative hypothesis which denoted by .
The claim is: The proportion of crimes committed after dusk will fall below the current level of 0.84
The null hypothesis is The proportion of crimes committed after dusk will same as the current level of 0.84.
Therefore,
Hence, the required null and alternative hypotheses are and respectively.
Answer:
The perimeter of a rectangle is the sum of twice the length and twice the width. The area of a rectangle is length times width.
Let width = x
Let length = x + 2
Perimeter = 44 meters
Area = ?
We can set an equation for perimeter.
2x + 2(x + 2) = 44
Solve the equation for x.
2x + 2x + 4 = 44
4x + 4 = 44
4x = 40
x = 10
Substitute this value of x into the variables.
width = 10 meters
length = 12 meters
Finally, multiply these two numbers to get your area. Keep in mind that the units for area is square meters.
Answer:
vtvtvtvyvyvybytcxctccttc the answer is 1
Answer:
x=65°
Step-by-step explanation:
Full circle is 360°,then 360-90-180=90,and
x+25=90
x=90-25
x=65°