the result of a statistical analysis shows that the tcalculate= 2.37 and the tcritical= 1.40. The alpha of the test was set at 0.05. What are your conclusions concerning the significance of the test? Would your conclusion change if the alpha were changed to 0.10 (assuming the tcritical and tcalculated stayed the same). Explain why or why not.
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the result of a statistical analysis shows that the tcalculate= 2.37 and the tcritical= 1.40. The alpha of the test was set at 0.05. What are your conclusions concerning the significance of the test? Would your conclusion change if the alpha were changed to 0.10 (assuming the tcritical and tcalculated stayed the same). Explain why or why not.
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- Assume we wanted to show that the true average height of students is less than 63 inches. Let's say we tested at an alpha of 0.05, and found a p-value of 0.0315. Which would be an appropriate conclusion and interpretation? A) With an alpha of 0.05, and a p-value of 0.0315, we reject the null and state we have sufficient evidence to support that the true average height of students is less than 63 inches. B) With an alpha of 0.5, and a p-value of 0.0315, we reject the null and state we have sufficient evidence to support that the true average height of students is less than 63 inches. C) With an alpha of 0.05, and a p-value of 0.0315, we fail to reject the null and state we have insufficient evidence to support that the true average height of students is less than 63 inches. D) With an alpha of 0.05, and a p-value of 0.0315, we fail to reject the null and state we have sufficient evidence to support that the true average height of students is greater than or equal to…Assume that ρxy = .30 between weight and exercise for the population of normal adults. However, a researcher believes the relationship is stronger for children. The researcher tests a sample of 28 children and obtains an rxy = .47. Does this result support the researcher’s belief? Conduct an appropriate statistical test using an alpha level of .05.andres asked if there is a relationship between the quality of sneakers worn by a sample of 20 volleyball players and their average number of point scored per game. he computed r= +.21 and immediately claimed he had evidence that better-quality sneakers are related to better performance (a) is his claim correct? why? (b) what are Ho and Ha? (c) with alpha=.05, what is rcrit ?
- Assume we wanted to show that the true average pulse rate of hamsters is greater than 55 beats per minute. Let's say we tested at an alpha of 0.07, and found a p-value of 0.864. Which of the following would be an appropriate conclusion and interpretation? A) With an alpha of 0.07, and a p-value of 0.864, we fail to reject the null and state we have insufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. B) With an alpha of 0.07, and a p-value of 0.864, we reject the null and state we have insufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. C) With an alpha of 0.07, and a p-value of 0.864, we reject the null and state we have sufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. D) With an alpha of 0.07, and a p-value of 0.864, we fail to reject the null and state we have sufficient evidence to…A school bus driver records the time (in minutes) it takes to commute to school for six days.Those results are: 25, 22, 17, 20, 15, and 10. Using an alpha value of ? = 0.10, test if the meantime is significantly different than 20 minutes.Assume we wanted to show that the true proportion of virginica iris seeds that fail to germinate is less than 20%. Let's say we tested at an alpha of 0.05, and found a p-vale of 0.082. Which of the following would be an appropriate conclusion and interpretation? A) With an alpha of 0.05, and a p-value of 0.082, we fail to reject the null and state we have insufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. B) With an alpha of 0.05, and a p-value of 0.0082, we reject the null and state we have sufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. C) With an alpha of 0.05, and a p-value of 0.082, we reject the null and state we have sufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. D) With an alpha of 0.05, and a p-value of 0.082, we fail to reject the null and state…
- A dentist wanted to determine if a relationship existed between childhood fluoride exposure and cavities. She took a sample of adults in her practice and counted how many cavities each person had in his or her permanent teeth. She also determined how many years of childhood each person was exposed to tap water with fluoride. The minimum value on this variable was 0 and the maximum was 18. Using the data below, an alpha of .05 and a two-tailed test, was there a significant relationship? Years of fluoride Number of cavities 0 10 18 1 2 7 12 3 3 4 10 5 M = 7.5s =6.98 M = 5.00s = 3.16Bo is buying some nails for a project. They are interested in whether the boxes are significantly lower than advertised. The company says the box of nails should weigh 10 lbs but Bo finds the average weight of 8 boxes id 9.8 lbs with a SD of .4 lbs. assume alpha of .10. What is the test statistic?A teacher wants to know if her students spend more money on their lunches than the national average (μ = $2.48). Her 20 students spend an average of $3.50 (Ŝ = 1.20). Assuming an alpha of .05, do her students spend significantly more on lunch than the national average? Group of answer choices Yes No