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Basile [38]
3 years ago
9

First grade children have heights that are normally distributed about a mean of 37 inches and a standard deviation of 2 inches.

A random sample of size 25 is taken and the mean is calculated. Find the probability that the mean value (X-bar) will be between 36.5 and 41.0 inches.
a. .894
b. .1088
c. .724
d. .0994
e. .223

Mathematics
1 answer:
harina [27]3 years ago
3 0

Answer:

the probability that the mean value (X-bar) will be between 36.5 and 41.0 inch is 0.894 the correct option is a)

step-by-step explanation:

See attached picture

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A hardware store clerk mixed nuts worth $1.32 per kilogram with bolts worth $1.20 per kilogram. If he made 108 kilograms of a mi
AlladinOne [14]

Answer:

the way to work these types of problems is to create a table. The table will have three rows and three columns.

The table:

Let x represent the kilograms of nuts, then 138 - x will represent the kilograms of bolts.

Product     Amount        Cost            Total

--------------------------------------------------------

  Nuts          x               .60         .60 * x

  Bolts      138 - x          .66         .66 * (138 - x)

  Mix          138             .65         .65 * (138)

Step-by-step explanation:

The equation:

The nuts plus the bolts must equal the mix or:

.60 * x + .66 * (138 - x) = .65 * 138

I do not like to work with decimals, so multiply each term by 100:

60 * x + 66 * (138 - x) = 65 * 138

Remove the parenthesis and combine like terms:

-6x = -66 * 138 + 65 * 138

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Divide both sides by -6:

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Solution:

The mixture contains 23 kilograms of nuts.

The mixture contains 138 - 23, or 115 kilograms of bolts.

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dangina [55]
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Answer:

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Step-by-step explanation:

The equation of line is given by y=mx+c.

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Given that line has slope

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7 0
3 years ago
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Answer:

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Step-by-step explanation:

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explanation;
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