Answer:
$14771055
Step-by-step explanation:
14 times 10= 140ft
140ft in yards is 46.67 in yards
46.67 times 31.65 =14771055
Answer: No, the means in the two studies significantly is not different at the 95% confidence level.
Step-by-step explanation:
Since we have given that
Study 1,
Mean = 30.8,
Standard Deviation = 6.2,
Sample size = 100
And
Study 2
Mean = 32.2,
Standard Deviation = 5.4,
Sample size = 200
So, Hypothesis would be
![H_0:\mu_1=\mu_2\\\\H_a:\mu_1\neq \mu_2](https://tex.z-dn.net/?f=H_0%3A%5Cmu_1%3D%5Cmu_2%5C%5C%5C%5CH_a%3A%5Cmu_1%5Cneq%20%5Cmu_2)
So, At 95% confidence level, z = 1.96
So, the test statistic value would be
![z=\dfrac{\bar{x}_1-\bar{x}_2}{\sqrt{\dfrac{\sigma^2_1}{n_1}+\dfrac{\sigma^2_2}{n_2}}}\\\\z=\dfrac{30.8-32.2}{\sqrt{\dfrac{6.2^2}{100}+\dfrac{5.4^2}{200}}}\\\\z=\dfrac{-1.4}{0.7281}\\\\z=-1.9228](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7B%5Cbar%7Bx%7D_1-%5Cbar%7Bx%7D_2%7D%7B%5Csqrt%7B%5Cdfrac%7B%5Csigma%5E2_1%7D%7Bn_1%7D%2B%5Cdfrac%7B%5Csigma%5E2_2%7D%7Bn_2%7D%7D%7D%5C%5C%5C%5Cz%3D%5Cdfrac%7B30.8-32.2%7D%7B%5Csqrt%7B%5Cdfrac%7B6.2%5E2%7D%7B100%7D%2B%5Cdfrac%7B5.4%5E2%7D%7B200%7D%7D%7D%5C%5C%5C%5Cz%3D%5Cdfrac%7B-1.4%7D%7B0.7281%7D%5C%5C%5C%5Cz%3D-1.9228)
Since 1.96>-1.9228
So, we will accept the null hypothesis.
Hence,No, the means in the two studies significantly is not different at the 95% confidence level.
Answer:
rfgwtwg
Step-by-step explanation:
The square root of 45 is 6.48 so the answer would be 6
2720636 muneys :3
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