Answer:
Straight-line depreciation
Step-by-step explanation:
APE X
b. What is the probability that between 50 and 75 (inclusive) had fished?
c. If the 180 men selected for the interview were selected by the marketing department of a sporting-goods company based on information obtained from their mailing lists, what would you conclude about the reliability of their survey results?
Answer:
(a) The probability that fewer than 50 had fished is 0.0002.
(b) The probability that between 50 and 75 (inclusive) had fished is 0.6026.
(c) The survey results are not reliable.
Step-by-step explanation:
Let X = number of men who had fished during the year.
The probability of the random variable X is, p = 0.41.
A random sample of n = 180 men are selected.
The random variable X follows a Binomial distribution with parameters n = 180 and p = 0.41.
A Normal approximation to Binomial is applied when the following conditions are met,
Check:
Thus, the distribution of x can be approximated by a Normal distribution with:
Mean =
Standard deviation =
(a)
Compute the probability that fewer than 50 had fished as follows:
Thus, the probability that fewer than 50 had fished is 0.0002.
(b)
Compute the probability that between 50 and 75 (inclusive) had fished as follows:
Thus, the probability that between 50 and 75 (inclusive) had fished is 0.6026.
(c)
If the sample of 810 men are selected from mailing list then it is highly probable that the sample is not a representative of the true population, i.e. sports men.
Because the people interested in sports are less likely to be interested in fishing.
Thus, it could be concluded that the survey results are not reliable.
Answer:
ST = 3
Step-by-step explanation:
it tells you that ST is 3
1/2 · 90
0.5 · 90
0.47 · 89
90/2
Answer:
The first and second one
Step-by-step explanation:
The given number 480 divided by 60 equals 8.
The division process involves successive subtraction of the divisor from the dividend until the remainder becomes less than the divisor.
To 480 divided by 60, to perform this division by dividing 480 by 60, resulting in a quotient of 8.
Division is an arithmetic operation that separates a number into equal groups, in this case, 480 is divided into 60 groups of equal size, and each group contains 8 items.
Dividing 480 by 60 can also be represented as 480 ÷ 60 = 8.
Hence, divide the given number 480 by 60 is equal to 8.
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Answer:
8
Step-by-step explanation: