Question

In: Advanced Math

A researcher believes that female stray cats are more cautious when approaching people than male cats....

A researcher believes that female stray cats are more cautious when approaching people than male cats. He knows that the stray cat population is 50% male and 50% female. In order to test this, visits 15 different areas where stray cats live and records the gender of the first cat to approach him. He finds that 12 of the 15 cats that approach him are male. Using a sign test:

D) What is the critical value? (In number of female cats)

Solutions

Expert Solution


Related Solutions

One researcher was disturbed by the tendency for female employees to overtime more than male employees....
One researcher was disturbed by the tendency for female employees to overtime more than male employees. For this he took a sample of 12 female employees and 10 male employees. The table below is data on how many hours were spent overtime a week. Using a non-parametric test and a 95% confidence level, can it be concluded that female employees are overtime more than male employees? Female (hour) Male (hour) 13 10 17 6 14 8 12 10 10 12...
Researcher A believes that waking is a more conscious state than dreaming. Researcher B believes that,...
Researcher A believes that waking is a more conscious state than dreaming. Researcher B believes that, in contrast, dreaming is a more conscious state than waking. Researcher C believes that Researchers A and B are both wrong, because waking and dreaming represent different “types” rather than different “levels” of consciousness. In 50-100 words, describe the justification for each Researcher’s belief, using materials in the lecture on States of Consciousness.
A researcher believes that community B has a lower income than community A. Forty people are...
A researcher believes that community B has a lower income than community A. Forty people are surveyed in each of the two communities regarding their income. In place A, the mean among the 40 individuals is 62 (given in thousands; you can ignore the ‘thousands’ and just use ‘61’), and the variance is 95; in place B, the mean among the 40 surveyed is 59, and the variance is 100.   Test the null hypothesis that the two communities have equal...
3. A researcher believes that community B has a lower income than community A. Forty people...
3. A researcher believes that community B has a lower income than community A. Forty people are surveyed in each of the two communities regarding their income. In place A, the mean among the 40 individuals is 62 (given in thousands; you can ignore the ‘thousands’ and just use ‘61’), and the variance is 95; in place B, the mean among the 40 surveyed is 59, and the variance is 100.   Test the null hypothesis that the two communities have...
A researcher believes she has designed a keyboard that is more efficient to use than a standard keyboard.
Old New 16 12 9 9 17 15 10 8 9 5 4 4 30 25 29 21 A researcher believes she has designed a keyboard that is more efficient to use than a standard keyboard. In order to help decide if this is the case, typing speeds were taken for 16 different people. Eight of them are assigned to use old key board, and the other eight people are assigned to use the new key board. The lengths of...
A researcher believes that maximum security inmates have a more lengthy arrest record than minimum security...
A researcher believes that maximum security inmates have a more lengthy arrest record than minimum security inmates. She collects a sample of 25 inmates from the minimum security prison and 32 inmates from the maximum security prison and computes the following data from the samples:                                                 Mean                           Standard Deviation Minimum:                   5.8                                         2.7 Maximum:                  6.2                                         1.9 1.Calculate the 95% CI for each group. Based on these data, is the researcher correct that maximum security inmates have a longer arrest records than...
A health researcher read the claim that  a 200-pound male can burn more than an average of...
A health researcher read the claim that  a 200-pound male can burn more than an average of 524 calories per hour playing tennis with a standard deviation of 45.9 calories. 37 males were randomly selected and the mean number of calories burnt per hour was 534.8. Test at 5% of level of significance whether the claim is correct? (Hint:  Right Tailed Test) State Null and Alternate Hypotheses. Apply test. Write your conclusion using critical value approach and p value approach. Construct a...
When a researcher is examining the association between gender (male/female) and high school grade point average,...
When a researcher is examining the association between gender (male/female) and high school grade point average, what test would be appropriate? Pearson correlation coefficient Chi-square Independent t-test Dependent t-test as your answer Dependent t-test
Do female college students tend to weigh more or less than male college students, on average?...
Do female college students tend to weigh more or less than male college students, on average? Suppose that we use data from the Student Data sheet to help us make a decision about this question. We will assume that those who responded to the student data sheet are representative of all college students and are a random sample. Below are summary statistics from the student data sheet (rounded to the nearest integer): Sex? N Mean St. Dev Median Minimum Maximum...
Do male college students spend more time than female college students using a computer? This was...
Do male college students spend more time than female college students using a computer? This was one of the questions investigated by the authors of an article. Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT