Statistics- 11 pts Descriptive statistics involves characterizing the obtained data

Ok Im back. I am down to $25 on the account. I apologize ahead if this is not enough please let me know if you want a bit more to answer these questions and I will gladly apply a bit more. These are the questions I'm working on. I did horrible on the other 33out50 so much help is needed.

thank you (laura)

Question 11 pts Descriptive statistics involves characterizing the obtained data.

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Flag this Question Question 21 pts True experiments involve the manipulation of variables by the investigator.

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Flag this Question Question 31 pts The method of authority is opposed to the scientific method.

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Flag this Question Question 41 pts Data are an indispensable part of scientific method.

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Flag this Question Question 51 pts In an experiment conducted to determine the effect of testosterone on aggression, testosterone is the independent variable.

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Flag this Question Question 61 pts When doing summation, the number above the summation sign indicates the term ending the summation and the number below indicates the beginning term.

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Flag this Question Question 71 pts If IQ was measured on a ratio scale, and John had an IQ of 40 and Fred an IQ of 80, it would be correct to say that Fred was twice as intelligent as John.

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Flag this Question Question 81 pts Measurement is always approximate with a continuous variable.

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Flag this Question Question 91 pts In rounding, if the remainder beyond the last digit is greater than 1/2, add one to the last digit. If the remainder is less than 1/2, leave the last digit as it is.

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Flag this Question Question 101 pts The number of students in a class is an example of a continuous variable.

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Flag this Question Question 111 pts The real limits of a discrete variable are those values that are above and below the recorded value by one half of the smallest measuring unit of the scale.

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Flag this Question Question 121 pts In grouping scores, the wider the intervals, the more information that is lost.

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Flag this Question Question 131 pts Any percentile point for a distribution of scores must have a value equal to one of the scores.

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Flag this Question Question 141 pts If a curve is negatively skewed, most of the scores occur at the higher values and the curve tails off toward the lower end of the horizontal axis.

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Flag this Question Question 151 pts A frequency distribution of grouped scores is used for distributions that have relatively few scores to stretch them out.

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Flag this Question Question 161 pts A stem and leaf diagram contains more information than a histogram.

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Flag this Question Question 171 pts The median and the 50th percentile rank score will always have the same value.

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Flag this Question Question 181 pts When calculating the population standard deviation, we use N - 1 in the denominator.

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Flag this Question Question 191 pts Central tendency describes the central location of the set of scores.

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Flag this Question Question 201 pts If the number of raw scores is odd, the median is always the score in the middle position.

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Flag this Question Question 211 pts In a bell-shaped distribution, the mean, median and mode will be equal.

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Flag this Question Question 221 pts For data that are not normally distributed, the standard deviation will sometimes be negative.

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Flag this Question Question 231 pts A z score designates how many standard deviations the raw score is above or below the mean.

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Flag this Question Question 241 pts The normal curve reaches the horizontal axis in 4 standard deviations above and below the mean.

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Flag this Question Question 251 pts It is impossible to have a z score of 30.2

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Flag this Question Question 261 pts The area beyond a z score of -1.12 is the same as the area beyond a z score of 1.12.

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Flag this Question Question 271 pts A raw score that is 1 standard deviation above the mean of the raw score distribution will have a z score of 1.

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Flag this Question Question 281 pts Correlation implies causation.

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Flag this Question Question 291 pts The range of a correlation coefficient is 0 to +1.

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Flag this Question Question 301 pts Pearson r requires that the data be of interval or ratio scaling.

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Flag this Question Question 311 pts Rho is used where one or both variables are at least of interval scaling.

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Flag this Question Question 321 pts In general, the regression line for predicting X given Y is the same as the regression line for predicting Y given X.

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Flag this Question Question 331 pts An imperfect relationship generally yields exact prediction.

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Flag this Question Question 341 pts Properly speaking, we should limit our predictions to the range of the base data.

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Flag this Question Question 351 pts To do linear regression, there must be paired scores on two variables.

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Flag this Question Question 361 pts If the correlation between two variables is 1.00, the standard error of estimate equals 0.

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Flag this Question Question 371 pts When a sampled score is put back in the population before selecting the next score, this process is called sampling without replacement.

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Flag this Question Question 381 pts Probability values range from 0 to 1.

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Flag this Question Question 391 pts The Addition Rule concerns one of several possible events.

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Flag this Question Question 401 pts When a variable is continuous, p(A) equals the area under the curve corresponding to A divided by the total area under the curve.

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Flag this Question Question 411 pts If an event is certain to occur, its probability of occurrence equals 1.00.

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Flag this Question Question 421 pts We always evaluate just the specific result obtained in the experiment.

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Flag this Question Question 431 pts The sign test analyzes both the magnitude and direction of the data.

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Flag this Question Question 441 pts If the result turns out to be in the direction opposite to a directional H₁, we must conclude by retaining H₀.

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Flag this Question Question 451 pts It is impossible to prove with certainty the truth of H₁ when using sample data.

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Flag this Question Question 461 pts If alpha is made more stringent, beta increases.

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Flag this Question Question 471 pts If H₀ is true, as the power of the experiment increases, the probability of rejecting H₀ increases.

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Flag this Question Question 481 pts Increasing N increases the probability of a Type II error.

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Flag this Question Question 491 pts Other factors held constant, a one-tailed test is more powerful than a two-tailed test.

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Flag this Question Question 501 pts High power is desirable in an experiment.

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Flag this Question Question 511 pts Decreasing beta will generally cause a to increase.

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Flag this Question Question 521 pts The degrees of freedom equal N - 1 for the t test for single samples.

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Flag this Question Question 531 pts The t test requires that the sampling distribution of t be normally distributed.

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Flag this Question Question 541 pts Generally speaking, the more confidence we have that the interval contains the population mean, the larger is the interval.

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Flag this Question Question 551 pts In general, ifr = 0, thenr = 0.

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