Flashcards
stats
Flashcards do conjunto (22)
- 1The speed of a certain aircraft is normally distributed. A random sample of 16 aircrafts was selected. Give the sampling distribution of X ̄.X ̄~t_15
- 2The gas mileage of a Toyota Camry has a mean of 26 miles and a standard deviation of 2 miles. A random sample of 80 cars (Toyota Camry) was selected. Give the sampling distribution of X ̄X ̄ ~ N(26, 2/√80 )
- 3Assume that the average age of all VSU students is normally distributed with mean of 28 years and a standard deviation of 8 years. A random sample of 16 students was selected. Give the sampling distribution of X ̄X ̄ ~ N(28, 8/√16 = 2)
- 4To study the average GPA of the biology majors at Stable University we selected a random sample of 82. Give the sampling distribution of X ̄.X ̄ ~ N(μ, σ/√82)
- 5(t_n-1 ; α/2 ) S/√nSampling Error under the t-distribution
- 6Z_(α/2) σ/√nSampling Error under the z-distribution
- 7σ/√nStandard deviation for X ̄ or Standard Error of the mean
- 8(Z_α/2 * σ) / m))^2Sample size formula for the mean
- 9E(X ̄ )μ
- 10Standard deviation of X ̄σ/√n
- 11Z= (X ̄ - μ_o)/(σ/√n)Test statistic for the z-distribution
- 12t_(n-1) = (X ̄ -μ_o) / (S/√n)Test statistic for the t-distribution
- 13μ_oHypothesized Mean
- 14X ̄ ± (t_n-1 ; α/2 ) S/√nConfidence Interval for μ under the t-distribution
- 15X ̄ ± Z_α/2 * σ/√n__Confidence Interval for μ under the Z-distribution
- 16αAlpha Level of Significance
- 17H_oNull Hypothesis
- 18H_aAlternative Hypothesis
- 19Z* < -Z_α or Z* >Z_α or |Z* | >Z_α/2Critical Regions for the Z-Test
- 20t_n-1* < -t_n-1;_α or t_n-1* >t_n-1;_α or|t_n-1* | >t_n-1;_α/2Critical Regions for the T-Test
- 21P (Z < Z* ) or P(Z > Z* ) or 2P (Z < -|Z*|)P-Value for a Z-Test
- 22The Pool Variance iss_p^2 = (n_1-1) s_1^2 + (n_2-1) s_2^2) / (n_1+n_2-2)
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- stats FlashCards sobre stats, criado por Tarynpolk polki em 13-11-2022.
- Criado por
- Tarynpolk polki
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