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2 years ago

I had $3

Mathematics

1 answer:

Anettt [7]2 years ago

6 0

Answer:

133 bucks can i get brainliest

Step-by-step explanation:

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In a sample of 138 tables, the average height was found to be 32.6in. with a variance of 2.8. Give a point estimate for the popu

vesna_86 [32]

Answer:

$\hat{\sigma}^2 = 2.8$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 138

Average = 32.6 inch

Population variance,

$\sigma^2 = 2.8$

We have to find a point estimate for the population variance of the height.

The point estimate for the population variance is the population variance itself.

$\hat{\sigma}^2 = \sigma^2 = 2.8$

Thus, the point estimate of population variance is the population variance that is 2.8.

5 0

3 years ago

A paint machine dispenses dye into paint cans to create different shades of paint. The amount of dye dispensed into a can is kno

Anton [14]

Answer:

4.464 ml

Step-by-step explanation:

Given that:

mean (μ) = 5 mm, standard deviation (σ) = 0.4 ml

The z score is a score in statistics used to determine by how many standard deviation the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if the z score is negative then the raw score is below the mean It is given by:

$z=\frac{x-\mu}{\sigma}$

From the normal distribution table, the 9th percentile (0.09) corresponds to a z score of -1.34

$z=\frac{x-\mu}{\sigma}\\\\-1.34=\frac{x-5}{0.4}\\\\x-5=-0.536\\\\x=5-0.536\\\\x=4.464$

The dye amount that represents the 9th percentile of the distribution is 4.464 ml

5 0

2 years ago

Shape A is congurents to shape______, as shown by a reflection across the y-axis and then a translation down_____ units. B is co

ivanzaharov [21]

Answer:

See below.

Step-by-step explanation:

Shape A is congruent to shape ___F___, as shown by a reflection across the y-axis and then a translation down __3___ units. B is congruent to shape __D__, as shown by a reflection across the y-axis and then a translation down __2___ units

8 0

3 years ago

Chris runs 6 miles in 50 minutes. At the same rate, how many miles would he run in 35 minutes?

Nataly_w [17]

You could either find how far Chris can run in 60 minutes, or write an equation of ratios:

x 35 min
--------- = --------------
6 mi 50 min

Solving for x: 50x = 210; x = 4.2 miles (answer)

4 0

3 years ago

Graph the function y = __ 2x

katen-ka-za [31]

Answer:

Well, if y is 1

Then the equation would be y = 1 (2x)

So, depending on the answer options. Y would be double of whatever the X value is.

See how 1 X value is worth 2 Y?

Example Attached

6 0

2 years ago