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Find the critical values and identify the rejection regions. Calculate d and sd. Use the t-test to find the standardized test statistic t. decide whether to reject or fail to reject the null hypothesis. Interpret the decision in the context of the original claim. The table shows the critical reading scores for 14 students the first two times they took a standardized test. At a =0.01, is there enough evidence to include that their scores improved the second time they took their test?
Students 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Scores first time 551 380 560 435 451 371 599 637 466 384 614 603 468 376
Scores second time 554 399 569 461 391 394 570 661 483 394 650 617 507 386.
The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom
Using sample, determine a 98% confidence interval for mean weight of whole daily output.
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
The probability of drawing a 6 (to complete an inside straight) after discarding the ace.
what is the sample space of all possible outcomes? Are the outcomes equally likely?
A manufacturer of dodge balls uses a machine to inflate its new balls to a pressure of 13.5 pounds (σ =0.1). When the machine is properly calibrated, the mean inflation pressure s 13.50 pounds, but uncontrollable factors can cause the pressure of ..
Find the percent of a standard Normal model found in the given region. Round to the nearest hundredth of a percent.
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
Find the range, standard deviation, and variance for the scores.
Which of the following(s) can be considered (a) variable(s)?
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
In performing the symmetric approximation, you calculate a mean of the total system cost as $1,725K. The variance is 22500. The POE is $1,600K.
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