How do you know whem do use the z score or the t tableHomework Answers
As the sample size is greater
than 30 we generally use Z-score
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How do you know whem do use the z score or the t table
(34) Suppose...
8. A study conducted a few years ago claims that the adult males spend an average...
8. A study conducted a few years ago claims that the adult males spend an average of 11 hours a week watching sports on television. A recent sample of 100 adult males showed that the mean time they spend per week watching sports on television is 9.50 hours with a standard deviation of 2.2 hours. a. Use the result to give a 95% confidence interval for the mean time they spend per week watching sports on television. b. Does the...
a sample of 106 body temperatures has a mean of 98.20 oF and a standard deviation...
a sample of 106 body temperatures has a mean of 98.20 oF and a standard deviation of 0.62 oF. use a 0.05 significance level to test the claim that the mean body temperature of the population is equal to 98.6 oF, as is commonly believed. Find the following: A. Original claim: B. Opposite claim: C. alternative and Null Hypothesis: D. significance level: E. test statistic: F. P-vaule G. reject or fail to reject: H. final conclusion:
a sample of 107 subjects had a mean body temperature of 98.20 F and a standard...
a sample of 107 subjects had a mean body temperature of 98.20 F and a standard deviation of 0.62 F . construct a 95% confidence interval for the mean temperature for the entire population. what does the result suggest about the common belief that mean body temperature is 98.6 F ?
Section 8.3: Testing Hypotheses. In Exercises 9-24, assume that a simple random sample has been selected...
Section 8.3: Testing Hypotheses. In Exercises 9-24, assume that a simple random sample has been selected and test the given claim. Unless specified by your instructor, use either the P-value method or the critical value method for testing bypotheses. Identify the null and alternative hypotheses, test statistic, P-value (or range of P-values), critical value(s), and state the final conclusion that addresses the original claim. 12. Discarded Plastic The weights (lb) of discarded plastic from a sample of households is listed...
13 . According to the American Time Use Survey, the typical American spends 154.8 minutes per...
13 . According to the American Time Use Survey, the typical American spends 154.8 minutes per day watching television. A survey of 50 Internet users results in a mean time watching television per day of 128.7 minutes, with a standard deviation of 46.5 minutes. Using 0.05 level of significance to test the claim that Internet users spend less time watching television. 14. College math instructors suggest that students spend 2 hours outside class studying for every hour in class. So,...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:3...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 98% confidence interval estimate of the population standard deviation. 65 62 62 56 62 54 60 59 60 69 61 67 Click the icon to view the table of Chi-Square critical values. mi/h. The confidence interval estimate is mi/h (Round to one decimal place as needed.) Does the confidence...
QUESTION 5 In order to determine how many hours per week freshmen college students watch television,...
QUESTION 5 In order to determine how many hours per week freshmen college students watch television, a random sample of 256 students was selected. It was determined that the students in the sample spent an average of 14 hours with a standard deviation of 3.6 hours watching TV per week. a. Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week. Assume that a sample of 66 students was...
a-c please 3. In order to determine how many hours per week freshmen college students watch...
a-c please
3. In order to determine how many hours per week freshmen college students watch television, a random sample of 25 students was selected. It was determined that the students in the sample spent an average of 19.5 hours with a sample standard deviation of 3.9 hours watching TV per week. Please answer the following questions: (a) Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week. (b)...
pls I need help.with the solution as soon as possible Use the following data for Questions...
pls I need help.with the solution as soon as
possible
Use the following data for Questions 6. 7. 8. and 9: Past data show the mean temperature of humans to be 98.6 degrees F. Some recent data for a sample of 26 females 1 to 4 times daily for three days yielded a total of 123 measurements. This sample data had a mean temperature of 98.4 degrees F with a standard deviation of 0.7 degrees F. Perform a hypothesis test...
It is commonly believed that the mean body temperature of a healthy adult is 98.6∘F98.6∘F. You...
It is commonly believed that the mean body temperature of a
healthy adult is 98.6∘F98.6∘F. You are not entirely convinced. You
believe that it is not 98.6∘F98.6∘F.
It is commonly believed that the mean body temperature of a healthy adult is 98.6° F. You are not entirely convinced. You believe that it is not 98.6° F. a) If you going to test this claim at the 0.01 significance level, what would be your null and alternative hypotheses? Ho: Select an...
8. A study conducted a few years ago claims that the adult males spend an average of 11 hours a week watching sports on television. A recent sample of 100 adult males showed that the mean time they spend per week watching sports on television is 9.50 hours with a standard deviation of 2.2 hours. a. Use the result to give a 95% confidence interval for the mean time they spend per week watching sports on television. b. Does the...
Section 8.3: Testing Hypotheses. In Exercises 9-24, assume that a simple random sample has been selected and test the given claim. Unless specified by your instructor, use either the P-value method or the critical value method for testing bypotheses. Identify the null and alternative hypotheses, test statistic, P-value (or range of P-values), critical value(s), and state the final conclusion that addresses the original claim. 12. Discarded Plastic The weights (lb) of discarded plastic from a sample of households is listed...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 98% confidence interval estimate of the population standard deviation. 65 62 62 56 62 54 60 59 60 69 61 67 Click the icon to view the table of Chi-Square critical values. mi/h. The confidence interval estimate is mi/h (Round to one decimal place as needed.) Does the confidence...
QUESTION 5 In order to determine how many hours per week freshmen college students watch television, a random sample of 256 students was selected. It was determined that the students in the sample spent an average of 14 hours with a standard deviation of 3.6 hours watching TV per week. a. Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week. Assume that a sample of 66 students was...
a-c please
3. In order to determine how many hours per week freshmen college students watch television, a random sample of 25 students was selected. It was determined that the students in the sample spent an average of 19.5 hours with a sample standard deviation of 3.9 hours watching TV per week. Please answer the following questions: (a) Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week. (b)...
pls I need help.with the solution as soon as
possible
Use the following data for Questions 6. 7. 8. and 9: Past data show the mean temperature of humans to be 98.6 degrees F. Some recent data for a sample of 26 females 1 to 4 times daily for three days yielded a total of 123 measurements. This sample data had a mean temperature of 98.4 degrees F with a standard deviation of 0.7 degrees F. Perform a hypothesis test...
It is commonly believed that the mean body temperature of a
healthy adult is 98.6∘F98.6∘F. You are not entirely convinced. You
believe that it is not 98.6∘F98.6∘F.
It is commonly believed that the mean body temperature of a healthy adult is 98.6° F. You are not entirely convinced. You believe that it is not 98.6° F. a) If you going to test this claim at the 0.01 significance level, what would be your null and alternative hypotheses? Ho: Select an...
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