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mr_godi [17]
1 year ago
6

A manufacturer of pacemakers wants the standard deviation of the lifetimes of the batteries to be less than 1.8 months. A sample

of 20 batteries had a standard deviation of 1.6 months. Assume the variable is normally distributed. Find the 95% confidence interval of the standard deviation of the batteries. Based on this answer, do you feel that 1.8 months is a reasonable estimate?
Mathematics
1 answer:
kodGreya [7K]1 year ago
3 0

Answer:

Look down my answer↓:

Step-by-step explanation:

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Answer:

7.5 lb/cu ft

Step-by-step explanation:

75 lb / 10 cu ft = 7.5 lb/cu ft

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2 years ago
Ayuda! <br> Necesito el inciso k) por 10 puntos
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Answer:

x=47is your answer

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3x=130+11

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Find Perimeter: SQUARE with sides that are each 5 inches in length
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Can somebody please help me on this? I will give brainliest :)
Gwar [14]

Answer:

1. False

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4 0
2 years ago
Elproducto de dos numeros es 880 si el multiplicando aumenta en 20 elproducto lo hace en 260 de como respuetsa la suma de ambos
frozen [14]

Answer:

\text {La} \, \text { suma }\, \text {de} \ \text {ambos} \, \text { numeros} \, \text { es }\  80\dfrac{9}{13}

Step-by-step explanation:

Los parámetros dados son;

El producto de los dos números = 880

El producto del multiplicando aumentó por 20 y el otro número = 260 + el producto inicial, 880

Dejemos que x represente el multiplicando, y que y represente el otro número, tenemos;

x × y = 880

(x + 20) × y = 880 + 260

Tenemos;

(x + 20) × y = x × y + 20 × y = 880 + 260

∴ 20 × y = 260

y = 260/20 = 13

y = 13

x = 880 / y

∴ x = 880/13

La suma de ambos números = x + y = 13 + 880/13 = 1049/13 = 80\dfrac{9}{13}

8 0
3 years ago
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