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ipn [44]
3 years ago
11

Which type of display best shows a change over time? A. Stem-and-leaf plot B. Histogram C. Line Graph D. Cumulative frequency

Mathematics
2 answers:
Rainbow [258]3 years ago
7 0

Answer:

the answer is c:

liubo4ka [24]3 years ago
4 0
C. line graph hope this helps
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Find the distance between (1,2) and (-3,5)
m_a_m_a [10]

Answer:

5

Step-by-step explanation:

√((5-2)^2 + (-3-1)^2) = √(9+16) = 5

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2 years ago
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is a coffee grinder can grind 1.4 pounds of coffee in one minute which model best represents the number of pounds it can grind i
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2.8 pounds of coffees
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3 years ago
A manufacturer considers his production process to be out of control when defects exceed 3%. In a random sample of 100 items, th
pochemuha

Answer:

The p-value of the test is of 0.2776 > 0.01, which means that the we accept the null hypothesis, that is, the manager's claim that this is only a sample fluctuation and production is not really out of control.

Step-by-step explanation:

A manufacturer considers his production process to be out of control when defects exceed 3%.

At the null hypothesis, we test if the production process is in control, that is, the defective proportion is of 3% or less. So

H_0: p \leq 0.03

At the alternate hypothesis, we test if the production process is out of control, that is, the defective proportion exceeds 3%. So

H_1: p > 0.03

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.03 is tested at the null hypothesis

This means that \mu = 0.03, \sigma = \sqrt{0.03*0.97}

In a random sample of 100 items, the defect rate is 4%.

This means that n = 100, X = 0.04

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.04 - 0.03}{\frac{\sqrt{0.03*0.97}}{\sqrt{100}}}

z = 0.59

P-value of the test

The p-value of the test is the probability of finding a sample proportion above 0.04, which is 1 subtracted by the p-value of z = 0.59.

Looking at the z-table, z = 0.59 has a p-value of 0.7224

1 - 0.7224 = 0.2776

The p-value of the test is of 0.2776 > 0.01, which means that the we accept the null hypothesis, that is, the manager's claim that this is only a sample fluctuation and production is not really out of control.

4 0
3 years ago
HELPPPPPPPLLL
love history [14]

Answer:

16

Step-by-step explanation:

4:2

2x4 = 8

4x4=16

7 0
2 years ago
Andrea has 18 yards of fabric. How many 4-inch pieces can she cut from her original piece?
Mrac [35]

Answer:

162 pieces

Step-by-step explanation:

Andrea has 18 yards

How many 4 inch pieces can she get?

Convert

1 yard = 3 feet

18 yards = 54 feet

1 foot = 12 inches

54 feet = 648 inches

Divide

648 inches ÷ 4 inches =  162 pieces

Hope this helps :)

6 0
3 years ago
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