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3 years ago

Plz Help 30 points:

Mathematics

2 answers:

BlackZzzverrR [31]3 years ago

6 0

Answer:

Part A: T stands for total money earned and S stands for money earned on Sunday

T = 11 + S

Part B: We know Larry walked AT LEAST twice the amount of dogs than Kyle. So, L standing for Larry and K for Kyle:

L = 2(K)

But, it tells us he walked twice, plus 4 more. So our final equation will be:

L = 2(K) + 4

Step-by-step explanation:

Inessa [10]3 years ago

4 0

Answer:

a = 2(b) + 4.

Step-by-step explanation:

Part A: $11 + a = b. A= the extra money he got for walking the dog. B= the total money for walking the dogs.

Part B: a = 2(b) + 4. I did + 4 because it says “Larry was able to walk 4 more than twice as many dogs as his friend Kyle”. This equation would work because a = Larry and b = Kyle, so Larry has 2 times the amount as Kyle plus the 4.

I hope this helps <3

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Answer:

Given:

Sham: n= 20, x=0.44, s=1.24,

Magnet:n= 20, x =0.49, s= 0.95

For Sham:

Sample size, n = 20

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Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

$\frac{s1^2}{s2^2}$

$\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037$

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b) P-value:

Sham: degrees of freedom $= n - 1 = 20 - 1 = 19$

Magnet: degrees of freedom $= n - 1 = 20 - 1 = 19$

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

$f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]$

$f[0.025, 19, 19], f[0.975, 19, 19]$

$(2.526, 0.3958)$

The rejection region:

Reject H0, if F < 0.3958 or if F > 2.526

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Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

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