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3 years ago

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A women has twice as many dimes as quarters in her purse.If the dimes were quarters and the quarters were dimes,she would have $

1.20 more than she now has.How many of each does she have?

1 answer:

skad [1K]3 years ago

3 0

2.98 i think dont come for if it not ok

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If you have a curvilinear relationship, then: (Hint: The two most important sources of bias in this context are probably lineari

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Answer:

b. Pearson's correlation can be used in the same way as it is for linear relationships

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3 years ago

Georgianna claims that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons.

Allisa [31]

Answer:

The condition are

The Null hypothesis is $H_o : \mu = 5$

The Alternative hypothesis is $H_a : \mu < 5$

The check revealed that

There is sufficient evidence to support the claim that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 5 \ year$

The sample size is n = 20

The sample mean is $\= x = 4.6 \ years$

The standard deviation is $\sigma = 2.2 \ years$

The Null hypothesis is $H_o : \mu = 5$

The Alternative hypothesis is $H_a : \mu < 5$

So i will be making use of $\alpha = 0.05$ level of significance to test this claim

The critical value of $\alpha$ from the normal distribution table is $Z_\alpha = 1.645$

Generally the test statistics is mathematically evaluated as

$t = \frac{\= x - \mu}{ \frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{ 4.6 - 5}{ \frac{2.2}{\sqrt{20} } }$

$t = -0.8131$

Looking at the value of t and $Z_{\alpha }$ we see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis

This implies that there is sufficient evidence to support the claim that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons.

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2 years ago

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GenaCL600 [577]

Answer: -29.3

Step-by-step explanation: -7y + 2x

-7(-6.3) + 2(-7.4) = -29.3

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2 years ago

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Is 51x51 is even or odd

AURORKA [14]

You can predict that it's odd because the end of the 2 numbers is 1 and 1 x 1 is 1 and one is an odd number. (answer is odd)

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2 years ago

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