State 1 State 2 283 229 254 267 328 326 292 309 315 231 336 283 378 344 314 310

State 1 state 2 283 229 254 267 328 326 292 309 315

This preview shows page 58 - 75 out of 163 pages.

State 1 State 2 283 229 254 267 328 326 292 309 315 231 336 283 378 344 314 310 312 258 328 316 272 241 307 281 348 218 233 284 354 311 400 254 341 217 313 267 309 299 308 266 340 264 300 264 316 290 268 312 259 298 276 305 271 244 362 303 340 299 339 285 300 308 333 260 204 291 242 329 315 246
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322 293 15 What is the decision rule? 16 What is statistical power? Basically is the significance level for a statistical test that is specified in advance of an analysis. Typical significance levels, called alpha levels, are .05 and .01. A difference is said to be statistically significant if a computed statistic's value exceeds the value that is expected at the significance level. The power of an hypothesis test is the probability of not making a Type II error, that is the probability of rejecting a false null hypothesis. Power varies between 0 and 1 and measures the ability of the hypothesis to detect a false null hypothesis.
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population standard deviation (10) are known. sample size on size of confidence interval. N=100 Upper limit Lower limit llowing video for an explanation of the Central Limit Theorem. ww.youtube.com/watch?v=JNm3M9cqWyc on of 10, but the population mean and the population standard deviation are unknown .
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-2.45 -2.31 -2.17 -2.03 -1.89 -1.75 -1.61 -1.47 -1.33 -1.19 -1.05 -0.91 -0.77 -0.63 -0.49 -0.35 -0.21 -0.07 0.07 0.21 0.35 0.49 0.63 0.77 0.91 1.05 1.19 1.33 1.47 1.61 1.75 1.89 2.03 2.17 2.31 2.45 2.59 2.73 2.87 3.01 The horizontal axis are z the small portion of the highlighted in blue. It's t the curve that exceeds th value of z.
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t-Test: Two-Sample Assuming Unequal Variances State 1 State 2 Mean 313.4063 279.625 Variance 1380.636 1196.343 Observations 32 40 Hypothesized Mean Difference 0 df 64 t Stat 3.95235 P(T<=t) one-tail 0.00010 t Critical one-tail 1.669013 P(T<=t) two-tail 0.000196 t Critical two-tail 1.99773
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3.01 3.15 3.29 3.43 3.57 3.71 3.85 3.99 values. Note curve the portion of he critical
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1 What's the difference in directional and non-directional hypotheses in statistical tests? 2 Compute a t-test comparing the two samples. State 1 State 2 283 229 p-value of the t-test comparing the two state 254 267 The t-value associated with the computed p 328 326 292 309 315 231 336 283 378 344 314 310 312 258 328 316 272 241 307 281 348 218 233 284 354 311 400 254 341 217
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313 267 309 299 308 266 340 264 300 264 316 290 268 312 259 298 276 305 271 244 362 303 340 299 339 285 300 308 333 260 204 291 242 329 315 246 322 293 3 Discuss the inpact of unequal group (sample) sizes on hypothesis tests. 4 Use the Data Analysis t-test tool to compare the mean for Males vs. Females. Place output Male Female 4.80 4.86 3.70 2.89 3.50 4.50 3.20 3.60 3.80 3.70 4.00 4.00 4.40 3.80 3.40 4.20 4.20 2.70 3.90 2.90 3.80 3.50 4.20 3.78 3.90 3.90
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4.00 4.75 3.38 3.90 4.00 3.70 3.30 3.20 3.50 2.80 3.40 4.00 3.60 3.70 3.50 3.89 3.70 3.80 4.00 4.30 3.00 2.60 4.30 4.20 4.00 3.70 2.60 4.60 3.30 4.60 4.10 3.00 3.00 4.40 3.90 2.70 4.30 3.50 3.50 4.30 3.80 3.60 3.60 3.80 3.90 4.30 4.30 4.00 3.70 3.50 3.80 4.30 3.60 4.10 4.20 3.90 3.70 3.00 3.50 3.20 3.90
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2.90 3.60 3.70 3.50 4.30 4.00 4.11 4.30 2.10 4.20 3.60 3.00 3.50 3.50 3.60 4.10 3.40 4.20 3.50 3.60 3.60 3.50 4.10 2.90 3.00 4.20 4.30 4.20 3.90 3.70 5 What is multiple gregression versus single regression? sex org ini indi inf prwe preq prwd 1 4.92 4.50 5.00 4.75 4.67 5.00 4.56 1 3.67 4.00 3.67 2.00 4.33 4.25 3.22 1 3.25 3.00 3.50 2.75 4.33 4.50 2.38 1 3.17 3.00 3.00 2.25 4.00 4.00 3.56 1 3.67 3.50 3.83 2.75 4.00 3.75 3.44 1 3.75 3.50 3.33 3.75 3.33 2.75 3.56 1 4.42 4.00 4.00 3.33 4.67 3.75 3.11 1 3.67 4.00 3.83 3.75 4.00 4.00 3.11 1 4.67 3.50 4.00 2.75 4.00 3.25 3.67 1 3.75 4.00 3.83 4.00 4.00 3.75 3.00 1 4.08 3.00 4.50 3.75 4.00 3.75 2.78
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1 3.83 4.00 3.67 2.75 4.00 4.00 3.67 1 4.00 2.50 2.50 3.50 3.33 4.00 2.33 1 4.00 3.50 3.17 3.00 4.00 4.00 3.33 1 2.92 3.00 3.00 3.00 4.00 3.50 2.67 1 3.92 2.50 3.33 3.75 3.67 3.75 2.89 1 3.17 3.00 3.67 2.25 4.00 3.25 3.11 1 4.08 4.50 4.00 3.50 4.00 4.00 3.67 1 3.75 4.00 3.67 3.75 4.00 3.75 2.78 1 3.58 4.00 3.67 3.75 4.33 3.75 2.56 1 3.42 3.50 3.33 3.75 3.67 3.75 2.67 1 4.67 4.00 4.67 4.50 4.33 4.00 2.89 1 4.00 4.00 3.50 3.50 4.33 3.75 2.67 1 4.33 4.00 4.33 4.50 4.00 4.00 3.78 1 3.42 2.50 3.50 2.25 4.67 2.50 2.67 1 2.25 3.00 2.00 2.00 2.33 3.25 3.00 1 4.42 3.50 4.00 4.00 4.00 4.00 3.56 1 4.33 3.50 4.00 3.50 4.67 4.00 3.56 1 4.00 3.50 3.50 3.75 4.00 3.75 3.25 1 3.83 3.00 3.00 2.50 4.33 4.00 3.11 1 2.50 3.50 3.50 3.25 4.00 4.00 3.11 1 4.75 4.50 4.67 4.50 5.00 4.50 4.00 1 3.58 3.50 2.50 2.75 4.00 3.25 2.33 1 4.67 4.50 4.67 4.75 4.67 3.75 3.67 1 4.17 4.00 4.00 4.25 4.33 4.00 2.56 1 2.83 3.50 2.67 3.75 3.67 2.75 1.89
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