Answer:
standard error = 1.63
Step-by-step explanation:
To calculate the standard error we need to know the standard deviation (σ) and the sample size (n) (see the attached formula).
To obtain the standard deviation we use the given sample variance of 77.4 years:
σ²= variance
Therefore:
σ = √77.4 = 8.8
Now we can calcuate the estimated standard error:
standard error = σ /√n = 8.8/√29 = 1.63
The standard error gives us an estimation about how far the mean of the sample is from the mean of the entire population, and in this case is 1.63.
The answer is "yes"
The expression 4x is the same as 4x^1. It is in the form ax^n where a = 4 is the coefficient and n = 1 is the exponent.
A polynomial can have exactly one term, which is what the case is here.
Answer:
3. 9
4. 24
Step-by-step explanation:
3. 15.5/3.1 = 5 45/5 = 9
4. 3r = 16p 128p = ?r
128/16 = 8x3 = 24
r = ref
p = player
/ = divide
Answer:
82.60208 yards 247.80624 ft 2,973.67488 inches (2,973.7 once rounded).
Step-by-step explanation:
Horses run at about 30 mph so looking at this it becomes clear that the time the horse will take to cover 1.408 miles is 1.408/30 = 0.046933 Yards. Using the conversion, 1,760 yd x 0.046933 = 82.60208 yards. Converting this to feet, 82.60208 yd * 3 = 247.80624 ft. Then converting this to inches, 247.80624 * 12 = 2,973.67488 inches (2,973.7 once rounded).
A fun, interesting fact is that the average yard is 72 ft in width, so taking 82.60208 / 72 = 1.147 miles.
You need to make the fractions into improper fractions with the same denometer. 3 4/7 to an improper fraction is 25/7 and 3 1/4 is 13/4. Now get common denometers, in going to choose 28. 100/28 is the same as 25/7 and 91/28 is the same as 13/4. Now subtract 100/28 and 91/28 and you get 9/28. So you need to add 9/28 of a cup.
