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A researcher believes exercise reduces anxiety in women. She identifies a group of women who had not exercised before but are now planning to begin exercising. she gives them a 50- item anxiety inventory before they begin exercising and administers it again after 6 monts of exercising. The anxiety inventory is measured on an interval scale and higher numbers indicate higher anxiety. In additon scores on the inventory are normally distributed. the scores appera below:
Before: 46,41,42,47,43,45
After: 44,40,39,46,42,43
a) what statistical test should be used to analyze these data?
b) identify Ho and Ha for this study
c) conduct the appropriate analysis
d) should Ho be refected? What should the researcher conclude?
e) if significant, compute the effect size and interpret this.
A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces.
q1.in developing a regression equation from the following data to predict y by x the slope isxy9188155713a1.88 b 0.44 c
There is not enough information to answer the question, the formula requires knowing the population standard deviation for Mark and Debbie, and we were not given this information.
in an experiment on magazine advertisements a researcher is examining visual displays to determine if one is more
a researcher wants to determine if the average performance on a standardized business management test is significantly
Determine the sample space of one such throw and determine the probability for each event and in the game of Ludo, a player has to throw one die and move a selected token based on the number shown on the die.
in the biomedical engineering field a study of coronary artery disease had three possible partitioning events b1 the
Assume that the significance level is a= 0.1. Use the given information to find the p-value and the critical value (s). With H1: p = with line through it 1/2 the test statistic is z= - 1.35
suppose you estimate a model obtaining wage 0.620 0.506 times educ 2.27 times female were wage is measured in
each person in random samples of 227 male and 283 female working adults living in a certain town in canada was asked
Evaluate the functions for the values of x given as 1, 2, 4, 8, and 16. Describe the differences in the rate at which each function changes with increasing values of x.
Calculate correlation coefficient for these sample data.
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