7-1) A police officer interviewed a sample of five men and a sample of five women...
7-1) A police officer interviewed a sample of five men and a sample of five women at various crime scenes. On average, he spent 8.4 minutes interviewing the men (std. dev. = 4.16) and about 14 minutes interviewing the women (Std. dev. = 3.16). He wants to know if there is a significant difference in the amount of time he spent interviewing both gender groups. Knowing that the amount of time the officer spent interviewing both groups is normally distributed:
- Formulate the null and the alternative hypotheses
- Using the independent-sample t test, test the null hypothesis stating no gender difference in the interview length
- List the value of the critical t you used to test H0 [df = n1 + n2 – 2; p = .05; 2-tail test]
- Reach a statistical conclusion using p = .05, 2-tail test
- Interpret your results
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7-1) A police officer interviewed a sample of five men and a
sample of five women...
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2. Is the sample representative of the target population? If
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3. What is the design of the study?
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3. Suppose you are asked to draw a random sample of men and women in order to measure their "emotional IQ'. The emotional IQ scale that you administer has a minimum of 0 and a maximum of 100, with higher scores indicating higher emotional intelligence. You sample 25 men and 25 women. The mean for men is 70 with a standard deviation of 10, and the mean for women is 82 with a standard deviation of 15. Using this information,...
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Forbes reports that women trust recommendations from Pinterest gender? The following sample data shew the number of women and men who stated in a recent semple that they trust recommendations more than recommendations from any other social network platform (Forbes website, April 10, 2012 ). But, does trust in Pinterest difter by recommendations made on Pinterest Men 170 Trust Recommendations Made on Pinterest 117102 Women 150 Sample a. What is the point s the point estimate of the proportion of...
photos for each question are all in a row
(1 point) In the following questions, use the normal distribution to find a confidence interval for a difference in proportions pu - P2 given the relevant sample results. Give the best point estimate for p. - P2, the margin of error, and the confidence interval. Assume the results come from random samples. Give your answers to 4 decimal places. 300. Use 1. A 80% interval for pı - P2 given that...
Please read and answer the following questions. 1. How was the
sample selected ? We’re demographics collected ?
2. Is the sample representative of the target population? If
not how was the sample “improved “ to make the results more
reliable and valid?
3. What is the design of the study?
4. How were the human subjects protected ?
5. Were instruments used reliable and valid ? Did they measure
the phenomenon under the study( how do you know that...
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