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tennis2007.org:

The inter-quartile selection is 13.

Step-by-step explanation:

1. Bespeak the data from least to greatest

2. Uncover the mean of the data.

You are watching: Solve the following 32 4 4 8

3. Calculate the typical of both the lower and also upper fifty percent of the data.

4. The inter-quartile selection is the difference in between the upper and lower medians.

Lower Median: 17

Media: 25.5

Upper Median: 30

## Inter-quartile range: 30 - 17 = 13

A sample that 1700 computer system chips revealed that 73% that the chips perform not fail in the first 1000 hrs of their use. The company"s p

Solution :

It is a left tailed test.

Given : n = 1700 α = 0.05

We desire to test,

the null hypothesis, the alternate hypothesis, 0.70 \$" alt="\$H_1: P> 0.70 \$" align="absmiddle" class="latex-formula">

Test statistics is   Thus z - vital value = 1.64

Since, z calculation ----- z-critical value

(2.70) (1.64)

Thus we disapprove the null hypothesis.

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So there is adequate evidence in ~ 0.05 level to assistance the company"s case that an ext the 70% perform not fail in the very first 1000 hours of their use.

tennis2007.org:

x = 8

Step-by-step explanation:

0.4x - 1.2 = 0.15x + 0.8

0.4x - 1.2 + 1.2 = 0.4x

0.15x + 0.8 + 1.2 = 0.15x + 2

0.4x = 0.15x + 2

0.4x - 0.15x = 0.25x

0.15x + 2 - 0.15x = 2

0.25x = 2

0.25x / 0.25 = x

2 / 0.25 = 8

x = 8

tennis2007.org:

Option C (f(x) = )

Step-by-step explanation:

In this question, the very first step is to write the general form of the quadratic equation, i m sorry is f(x) = , where a, b, and c room the arbitrarily constants. There are details characteristics of the worths of a, b, and c which determine the nature of the function. If a is a confident coefficient (i.e. If a>0), climate the quadratic duty is a minimizing function. On the various other hand, a is an unfavorable (i.e. If a 5 0