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alex41 [277]
2 years ago
5

What's is the answer​

Mathematics
1 answer:
Anna71 [15]2 years ago
5 0
The answer is #2 you’re welcome
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The life expectancy in the US is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected. What is
victus00 [196]

Answer:

0.02275

Step-by-step explanation:

We use this z score formula to solve for this question

z-score is is z = (x-μ)/σ/√n

where x is the raw score

μ is the population mean

σ is the population standard deviation

From the above question,

x = 77

μ = 75

σ = 7

number of samples = 49

Hence, the z score = 77 - 75/ (7/√49)

= 2/(7/7)

= 2/1

= 2

Hence, the z score = 2

Using the z table to find probability

P(x<77) = 0.97725

P(x>77) = 1 - P(x<77)

= 1 - 0.97725

= 0.02275

Therefore, the probability that the same mean will be larger than 77 years

is 0.02275

7 0
2 years ago
The tempature in Frwnoo is 71.8.<br><br> Round this temp. to nearest whole number.
makkiz [27]

Answer:

72

Step-by-step explanation:

Round to nearest whole number.

71.8 is rounded to 72.

72 is the answer to your question.

8 0
3 years ago
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6 [ 13 - 2 ( 4 + 1 ) ] simply step by step
sp2606 [1]

Answer:

18

Step-by-step explanation:

6(13 - 2(4 + 1)) \\ 6(13 - 2 \times 5) \\ 6(13 - 10) \\ 6 \times 3 \\  = 18

4 0
3 years ago
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Y=f(x+4) graphed help
Inessa [10]

Answer: y=fx+4f

Step-by-step explanation:

There is no graph possible for this equation.

5 0
3 years ago
A student bought tickets online the total cost c in dollar of t, tickets can be found using the fuction below c=24.50t+9.50
dalvyx [7]
What is the total cost or it is unsolvable?
8 0
3 years ago
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