Question

In: Statistics and Probability

Again, there is research on the relationship between gender and sense of direction. Recall that, in...

Again, there is research on the relationship between gender and sense of direction. Recall that, in their study, the spatial orientation skills of 30 male and 30 female students were challenges in a wooded park near the Boston College campus in Newton, Massachusetts. The participants were asked to rate their own sense of direction as either good or poor.

In the park, students were instructed to point to predesignated landmarks and also to the direction of south. For the female students who had rated their sense of direction to be good, the table above provides the pointing errors (in degrees) when they attempted to point south.

  1. If, on average, women who consider themselves to have a good sense of direction do not better than they would by just randomly guessing at the direction of south, what would their mean pointing error be?
  2. At the 1% significance level, do the data provide sufficient evidence to conclude that women who consider themselves to have a good sense of direction really do better, on average, than they would by just randomly guessing at the direction of south? Use a one-mean t-test.
  3. Obtain a normal probability plot, boxplot, or stem-and-leaf diagram of the data. Based on this plot, is use of the t-test reasonable? Explain your answer.

Solutions

Expert Solution


Related Solutions

Is there a relationship between handedness and gender?
  Is there a relationship between handedness and gender? A researcher collected the following data in hopes of discovering if handedness and gender are independent (Ambidextrous individuals were excluded from the study). Use the Chi-Square test for independence to explore this at a level of significance of 0.05.   Left-Handed Right-Handed Men 13 22 Women 27 18
A professor is studying to see if there is a relationship between the grades and gender...
A professor is studying to see if there is a relationship between the grades and gender of his students. He picks a random sample of his students and notes their grades (A, B, or C) and their gender (male or female). He finds that: 28% are A students. 58% are B students. 62% of his students are female. Of those who are female, one-third are A students. Of those who are B students, three-fifths are female students. What percentage of...
At the 0.05 level of significance, is there evidence of a relationship between gender and the...
At the 0.05 level of significance, is there evidence of a relationship between gender and the searched meal type? (Give detailed answer.) What is the expected frequency in case of categories: males and breakfast? If there is a significant stochastic relationship, compute and interpret the Cramer indicator. Food type/Gender Male Female Total Breakfast 12 32 44 Appetizer 41 32 73 Main course (lunch or supper) 49 54 103 Dessert 37 43 80 Total 139 161 300
A professor is studying to see if there is a relationship between the grades and gender...
A professor is studying to see if there is a relationship between the grades and gender of his students. He picks a random sample of his students and notes their grades (A, B, or C) and their gender (male or female). He finds that: 28% are A students. 58% are B students. 62% of his students are female. Of those who are female, one-third are A students. Of those who are B students, three-fifths are female students. What percentage of...
Research question #2.   Is there a relationship between the relationship between the juveniles’ age and the...
Research question #2.   Is there a relationship between the relationship between the juveniles’ age and the change of the scores from pretest to posttest (the larger the change, the better the outcome)? (13 points) SPSS Dataset SPSS Data for HW (500 cases).sav (available in Canvas) Variable Names in the dataset age: Age of juveniles change: Change of the scores from pretest to posttest What are the dependent variable (DV) and independent variable (IV)? (1 point) State the research hypothesis (non-directional)...
3. What is the relationship between sex and gender? Provide an example of the difference between...
3. What is the relationship between sex and gender? Provide an example of the difference between gender identity and gender expression
Stephanie is curious in knowing whether there is a relationship between gender and the area of...
Stephanie is curious in knowing whether there is a relationship between gender and the area of interest. She randomly sampled some students and collects the following info. Her objective is find out if the gender influences the choice of the field to study. Science Arts Business Total Male 27 28 45 100 Female 20 41 54 115 Total 47 69 99 215 1. How many degrees of freedom should she use for the Chi-Square test? 2. What is the Chi-Squared...
You are interested in the relationship, if any, between reward and gender on the productivity of...
You are interested in the relationship, if any, between reward and gender on the productivity of your employees. To test your suspicion that the variables are independent, you divide 100 employees into two groups of 50 males and 50 females. After each member of either group is rewarded, you record their change in productivity with the following results: Productivity                             Decreases                      No Change                       Increases Males              30             15                  5 Females              20             15                 15 What is the critical value at the .05 level of significance?...
            We seek to determine whether or not there is a relationship between gender and preference for...
            We seek to determine whether or not there is a relationship between gender and preference for ice cream        flavor. My data come from a hypothetical survey of 920 people that asked for their preference of 1 of the above             3 ice cream flavors. Here are the data:   Flavor Chocolate Vanilla Strawberry Total Gender Men 100 120 60 280 Women 350 200 90 640 Total 450 320 150 920 a.         State the Null and Alternative hypotheses.  (2)             b.         Assuming the Null Hypothesis is correct, find...
We seek to determine whether or not there is a relationship between gender and preference for...
We seek to determine whether or not there is a relationship between gender and preference for ice cream flavor. My data come from a hypothetical survey of 920 people that asked for their preference of 1 of the above 3 ice cream flavors. Here are the data: Flavor Gender Chocolate Vanilla Strawberry Total Men 100 120 60 280 Women 350 200 90 640 Total 450 320 150 920 a. State the Null and Alternative hypotheses. b. Assuming the Null Hypothesis...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT