The confidence interval (does not include) the mean wake time of 101.0min before the treatment, so the means before and after the treatment (are different.) This result suggests that the drug treatment (has) a significant effect. subjects were treated with garlic in a processed tablet form.
Full Answer
Does the confidence interval estimate indicate whether the treatment is effective?
What does the confidence interval suggest about the effectiveness of the treatment? A. The confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol
How robust are confidence interval methods for the mean?
What does the confidence interval suggest about the effectiveness of the treatment? A.The confidence interval limits contain 0, suggesting that the garlic treatment tdid not. affect the LDL cholesterol levels. B.The confidence interval limits do not contain0, suggesting that the garlic …
Is there a difference between the mean and confidence interval limits?
What does the confidence interval suggest about the effectiveness of the treatment? A. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL …
Does a confidence interval for Σ have s at the center?
The confidence interval (does not include) the mean wake time of 101.0min before the treatment, so the means before and after the treatment (are different.) This result suggests that the drug …
Where is the sample mean in a confidence interval?
No mater how many times we calculate our sample mean and confidence interval, the the sample mean will always be exactly in the middle of our confidence interval. That is because we use the sample mean as the center point of the confidence interval as seen in the formula below:
What is the critical value of 99% confidence?
For 99% confidence level, the critical value of t is t^*=2.624 .
What is a clinical trial?
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 550 babies were born, and 275 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?
What is the standard deviation of 105 body temperature?
A data set includes 105 body temperatures of healthy adult humans having a mean of 98.7degreesF and a standard deviation of 0.64degreesF. Construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6degreesF as the mean body temperature?
What is the purpose of a physician's pulse rate?
A physician wants to develop criteria for determining whether a patient's pulse rate is atypical, and she wants to determine whether there are significant differences between males and females. Use the sample pulse rates below. Using spss:
What percentage of survey data causes no significant change?
less than 10%. Based on this, the additional survey information causes no significant change
Is the interval less than 0.5 the week before the holiday?
b.)No, because the proportion could easily equal 0.5. The interval is not less than 0.5 the week before the holiday.
What is the confidence level of a football player?
The confidence level is 90%, σ is not known, and the histogram of 64 player salaries (in thousands of dollars) of football players on a team is as shown.
What is the number of degrees of freedom for a collection of sample data?
The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values.
Does the normal distribution apply to the t distribution?
Neither the normal distribution nor the t distribution applies.
Is a sample size of 50 a normal distribution?
c. Because the sample size of 50 is greater than 30, the distribution of sample means can be treated as a normal distribution.
When we have a sample size n with xequals0 successes, we have 95% confidence that
According to the Rule of Three, when we have a sample size n with xequals0 successes, we have 95% confidence that the true population proportion has an upper bound of StartFraction 3 Over n EndFraction
How many failures are required for normal distribution?
The requirement of at least 5 successes and at least 5 failures is not satisfied, so the normal distribution cannot be used.
Is 0.0424 % included in the confidence interval?
Yes, because 0.0424% is not included in the confidence interval. no, because 0.0313% is included in the confidence interval. Refer to the data set of 20 randomly selected presidents given below. Treat the data as a sample and find the proportion of presidents who were taller than their opponents.
What does it mean when intervals overlap?
A) The intervals overlap, so the populations appear to have amounts of variation that are not substantially different.
Does confidence interval mean treatment is effective?
a) Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes.
Do intervals overlap?
D) The intervals do not overlap, so the populations appear to have amounts of variation that are substantially different. The professor evaluations have a significantly larger population standard deviation than the course evaluations.
Is the confidence interval 93.9 minutes?
c) Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 93.9 minutes.
