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Assume a group of students provides happiness ratings for how happy they feel during the school year and how happy they feel during the summer. Do happiness levels differ depending on the time of year? Fictional data appear below:
a. Compute the Wilcoxon signed-rank test statistic.
b. Make a decision regarding the null hypothesis.
the mean length of time per week that students at a certain school spend on their homework is 24.3 hours with a
Suppose your instructor randomly surveyed his or her performance (i.e., students "graded" the teacher) over many years (assume an 'infinite' population). The frequency of ratings were as follows:
Does the plot show a positive association, a negative association, or no association between the two variables? Explain.
Every time Player A loses he must pay Player B $1, while every time Player B loses he must pay Player A $3. - If the two players repeat the game 10 times, what is the expected value of Player A's winnings?
You have Xs and Os (nine of each) in a bag near a tic-tac-toe board. You arbitrarily select an X or an O, and then you place it arbitrarily on the board.
The appropriate statistic to use when testing the hypothesis for a study with three treatment groups is a one sample T test? Or two sample T test?
At the 10% level of significance, does the following sample evidence indicate that the two population means are equal? Assume the populations are normally distributed.
Cans of a cola beverage claim to contain 16 ounces. The amounts in a sample are measured and the statistics are n = 34, x¯ = 16.01 ounces.
Explain why the statement is incorrect. RETAIL SALES Mark Owens, an optician, estimates that the probability that a customer coming into his store.
A monkey climbs 90cm up a slippery pole every second and slips down 60cm over the next second.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300.00?
1. in a well known quiz show the contestant is asked to choose between door number 1 door number 2 and door
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