Samples of size n = 600 are taken from a telephone survey, and the mean age is taken for each sample. What is the distribution of the sample means?A. skewed to the left
B. normal (approximately)
C. not enough information provided
D. skewed to the right

Answers

Answer 1

Answer: The answer in B. For complicated statistics reasons the Central Limit Theorem states that, for sample sizes of above 25 (or 30 depending on the text!), the distribution of sample means is approximately normal regardless of the distribution of the parent distribution

Answer 2

Answer:

Answer:

B. normal (approximately)

Step-by-step explanation:

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Which answers describe the end behaviors of the function modeled by the graph? f(x)=−3x+2−2Select each correct answer.As x increases without bound, f(x) approaches the line y=−2.As x increases without bound, f(x) increases without bound.As x decreases without bound, f(x) approaches the line y=−2.As x increases without bound, f(x) decreases without bound.

What is £390 shared as 5:8 ratio

Answers

Shared ratio is 5 : 8

Total parts
5+8 = 13

If we want to get a single part, it has to be divided by 13.
390 / 13 = 30

therefore,
5 : 8
1*5 : 1*8
30*5 : 30*8
150 : 240

A single die is rolled twice. Find the probability of rolling an Odd number the first time and a number greater than 4 the second time.

Answers

The probability of rolling an odd number the first time and a number greater than 4 the second time is 1/6

The sample space of a single die is

$\mathbf{S = \{1,2,3,4,5,6\}}$

So, the total sample is 6

The odd numbers are

$\mathbf{Odd = \{1,3,5\}}$ --- 3 odd numbers.

So, the probability of selecting an odd number is:

$\mathbf{P(Odd) = \frac 36}$

Simplify

$\mathbf{P(Odd) = \frac 12}$

The numbers greater than 4 are

$\mathbf{Greater = \{5,6\}}$ --- 2 numbers greater than 4.

So, the probability of selecting a number greater than 4 is:

$\mathbf{P(Greater) = \frac 26}$

Simplify

$\mathbf{P(Greater) = \frac 13}$

The probability of rolling an odd number the first time and a number greater than 4 the second time is calculated as follows:

$\mathbf{P = P(Odd) * P(Greater)}$

So, we have:

$\mathbf{P = \frac 12 * \frac 13}$

$\mathbf{P = \frac 16}$

Hence, the probability is 1/6

Answers

$P(t)=1.39.(1.005)^t \ \ \ \ where t \ is \ time \ in \ months\n \n P(1)=1.39.(1.005)^1\n \n P(1)=1.39*1.005\n \n P(1)=\$ \ 1.40$

Answer:

$1.40

Step-by-step explanation:

plug into formula

if plugged in right, plug into calculator.

You then should get the total of $1.40. :D

Colette has already spent 3 minutes on the phone, and she expects to spend 1 more minutewith every phone call she routes. In all, how many phone calls does Colette have to route
to spend a total of 26 minutes on the phone?

Answers

If she spends 4 minutes on each call she would need to make 7 calls

The revenue, in dollars, of a company that produces jeans can be modeled by 2x2 + 17x – 175. The cost, in dollars, of producing the jeans can be modeled by 2x2 – 3x – 125. The number of pairs of jeans that have been sold is represented by x. The profit is the difference between the revenue and the cost, 20x – 50. If 75 pairs of jeans are sold, what is the company’s profit?

Answers

Revenue: 2x² + 17x - 175
Cost: 2x² - 3x - 125
Profit: 20x - 50

Profit = Revenue - Cost
Profit = 2x² + 17x - 175 - (2x² - 3x - 125)
Profit = 2x² - 2x² + 17x + 3x - 175 + 125
Profit = 20x - 50

x = 75

profit = 20(75) - 50
profit = 1500 - 50
profit = 1450

Answer:

20x−50; $1,450

Step-by-step explanation:

The base of an isosceles triangle is one more than twice the length of its legs. The perimeter is 25. Find the length of the legs.