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For each pair of values, state the decision that will occur and state why:
The teacher ratio is 1:25. currently, the school district has 3,150 students. if the student enrollment increases by 20%, how many additonal teachers must be hired to reduc ethe teacher-student rati
You notice in your introductory psychology class that more women tend to sit up front, and more men sit in the back. To determine whether this difference is significant, you collect data on the sea
If your analysis notes that males in a weight loss program differ from females in amount of weight lost based on the type of weight program used, what type of effect is this called?
What statistical test should be used to analyze these data?
Which of the following would be an example of a design that examines the effects gender and school type (i.e. elementary, middle, high school) on a scale of student attitudes toward learning?
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 in
When analysis of data reveals differential effects of one factor across levels of another factor, what is this called?
Question: A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability.
A 28yr old man pays $165.00 for a one year life insurance policy with coverage of $140,000.00. If the probability that he will live thru the year is 0.9994, what is the expected value for the insur
Construct a 95% prediction interval for y given x = -3.5, the regression equation y = 2.097x0.552, and the standard error of estimate is 0.976. The data pairs are:
If a simple Pearson correlation value = .685, what percentage of variance is accounted for?
Hannah Dakota's experiment obtained reaction time data using a factorial design with two independent variables. She should use a __________ to evaluate her data.
For a standard normal probability distribution, find the percentage of data that are:
A history professor decides to give a 12-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than .10
EPA studies of fuel consumption indicate compact car mileage to be normally distributed with a mean of 25.5 miles per gallon and a standard deviation of 5.0 mpg. What percentage of compact cars gets
The probabilities of blood types O, A, B, and AB in western populations are 0.46, 0.39, 0.12 and 0.03 respectively. Suppose that a clinic is seeking either type O or type B blood.
A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, &
What is the probability that a well shuffled deck will produce a straight flush (five cards of one suit in order; A,K,Q,J,10 of spades or 5,4,3,2,A of hearts, etc. note that the ace can be high or
What proportion of the data from a normal distribution is two standard deviations from the mean?
A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is 5. What is the standard error of the mean (to 2 decimals)?
Suppose you flip a fair coin 500 times. What is the standard error for the number of heads you flip?
Only using standard six sided dice and/or a standard deck of playing cards, create a casino game that has all of the following characteristics:
Find the probability, using the binomial distribution, of obtaining 2 or more nonconforming units when sampling 5 computers from a batch known to be 6% nonconforming.