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erastovalidia [21]
2 years ago
10

An ice cream cone has a radius of 7 cm and a height of 8 cm

Mathematics
1 answer:
zmey [24]2 years ago
4 0

Answer:

TSA of ice cream cone = 330 cm^2

Step-by-step explanation:

Total Surface Area of ice cream cone = pie r( r+h )

22/7 * 7 (7+8)

22 ( 7+8)

22*15

= 330 cm. square

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x = 50

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Consider the following hypothesis test: H0: μ1 - μ2 = 0 Ha: μ1 - μ2 ≠ 0 There are two independent samples taken from the two pop
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Answer:

The value of the test statistic is z = 1.78

Step-by-step explanation:

Before finding the test statistic, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Sample 1:

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Sample 2:

\mu_2 = 108, s_2 = \frac{6.3}{\sqrt{64}} = 0.7875

The test statistic is:

z = \frac{X - \mu}{s}

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0 is tested at the null hypothesis:

This means that \mu = 0

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What is the value of the test statistic?

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z = \frac{2 - 0}{1.1226}

z = 1.78

The value of the test statistic is z = 1.78

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3 years ago
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