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Tresset [83]
3 years ago
11

Show pairs of equivalent expressions

Mathematics
1 answer:
valentinak56 [21]3 years ago
3 0

Answer:

1. 4x5÷3 is a pair with 4x3÷5

2. 5x 4/3 is a pair with 5x3÷4

3. 3x 5/4 is a pair with 4x 3/5

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Suppose a sample of 30 employees from the manufacturing industry showed a sample mean of $23.89 per hour. Assume a population st
timama [110]

Answer:

The<em> p</em>-value of the test is 0.1212.

Step-by-step explanation:

A one sample <em>z</em>-test can be performed to determine whether the mean hourly wage differs from the reported mean of $24.57 for the goods-producing industries.

The hypothesis is defined as:

<em>H₀</em>: The mean hourly wage is same as the reported mean of $24.57 for the goods-producing industries, i.e. <em>μ</em> = $24.57.

<em>Hₐ</em>: The mean hourly wage differs from the reported mean of $24.57 for the goods-producing industries, i.e. <em>μ</em> ≠ $24.57.

The information provided is:

\bar x=\$23.89\\n=30\\\sigma=\$2.40

Compute the test statistic as follows:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}=\frac{23.89-24.57}{2.40/\sqrt{30}}=-1.55

The test statistic value is, <em>z</em> = -1.55.

Compute the <em>p</em>-value of the test as follows:

p-value=2\times P(Z

*Use a <em>z</em>-table for the probability.

Thus, the<em> p</em>-value of the test is 0.1212.

4 0
4 years ago
Suppose that true average price of a beer at professional sporting events in the US is $6. You attend 34 events and find an aver
aniked [119]

Answer: The standard error for sample is 0.0686 .

Step-by-step explanation:

We know that the formula to find the standard error is given by :-

S.E.=\dfrac{s}{\sqrt{n}}

, where s = standard deviation

n= Sample size

As per given , we have

s=  $0.4  and n= 34

Then , the standard error for sample is given by :-

S.E.=\dfrac{0.4}{\sqrt{34}}=\dfrac{0.4}{5.83095189485}\\\\=0.0685994340569\approx0.0686

Hence , the standard error for sample is 0.0686 .

5 0
4 years ago
if 5 billion pennies are minted each year, how long would it take to mint the pennies needed to stack to the sun? pls show all w
antoniya [11.8K]

Answer:

27591599.

Step-by-step explanation:

5 0
3 years ago
Which opening sentence goes best with the details in the above paragraph?
grigory [225]
C is the best choice in my opinion
4 0
4 years ago
Escape what is on sale for 60% off the regular $80 price what is the sales price
mylen [45]

Answer:

$32 is the sales price.

Step-by-step explanation:

First, change the percentage to a decimal.

60% = 60/100 = 0.6

Next, multiply 0.6 with the regular price ($80)

80 x 0.6 = 48

$48 is the discount. Subtract from the original price

80 - 48 = 32

$32 is the sales price.

~

8 0
4 years ago
Read 2 more answers
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