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What are the values of the (1) test statistic, (2-3) critical values and the (4) smallest level of significance at which the null hypothesis can still be rejected when a 5% level of significance is
A teacher instituted a new reading program at school. After 10 weeks in the program it was found that the mean reading speed of a random sample of 19 second grade students was 92.9 wpm. What might y
A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5. The average for the general population of elementary school children is 100 (
The reading speed of second grade students in large city is approximately normal, with a mean on 90 words per minute and standard deviation of 10 wpm complete parts a-c C)
Assume that you are expecting a medium effect size, ? = 0.05, and a minimum power of 0.80. Your experiment utilizes three (3) groups. What is the required sample size (a priori)? How many data point
What is the probability that a random sample of 13 second grad students from the city results in a mean reading rate of more than 95 wpm? The probability is ____(Round to four decimal places as need
Jinbao produces tubas and ships them in lots of twenty. Suppose that 60% of all such lots contain no defective tubas, 30% contain one defective, and 10% contain two defectives. Now suppose that a lo
Nonparametric procedures are usually not our first choice among statistical procedures because
If the advisor uses each student's high school GPA to predict his/her freshman-year GPA, what happens to the average error in prediction relative to not using high school GPA to predict freshman-yea
A recent news report indicated that out of 105 people polled, 65 men and 15 women had given the president a high approval rating, while 15 men and 10 women had given the president a low approval rat
If you are interested in how well students perform on a standardized math achievement test after they have completed a six-week math unit in either a computer-assisted class, a videotaped course, or
When an experiment design has two factors but one factor involves related samples while the other factor involves independent samples, we should perform a:
A significant interaction effect indicates that: The influence of one factor is not the same for each level of the other factor.
Which of the following would not result in an increase in the power of ANOVA?
Distribution of all possible values of F regardless of whether H0 is true or false. Sampling distribution showing all values of F that occur when H0 is true and all conditions represent one population
In terms of hypotheses, one of the major differences between the t-test and ANOVA is that:
A sample of 230 observations is selected from a normal population for which the population standard deviation is known to be 24. The sample mean is 18. Determine the standard error of the mean
Run the Chi-Square test for independence using the calculator in the module. Note that StatCrunch does NOT support this type of Chi-Square.
The boy has tracked demand over his first few months and he has determined that the following probability distribution correctly captures the demand for sandwiches each day:
The maximum error of estimate is a function of three factors: the level of confidence, sample size and standard deviation. T-F, and why or why not? Explain the difference between a point estimate an
In Study Hall 3 of the 16 girls have red hair and 2 of the 15 boys have red hair. What is the probability of selecting a boy or a red haired person to run an errand for the teacher.
A rancher runs a closed herd of breedin cattle.He keeps and breeds the top 3%of bull calves based on individual performance for yearling weight. His sires avg 3 years of age when their offspring are
One article reports that in a sample of 355 calves less than 4 days old, 106 had lesions on their bronchial lymph nodes, while in a sample of 467 calves more than 4 years old, 147 had such lesions.
One article reports that in a sample of 413 male college students, the average number of energy drinks consumed per month was 2.49 with a standard deviation of 4.87, and in a sample of 382 female co