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8. A study conducted a few years ago claims that the adult males spend an average...
How do you know whem do use the z score or the t table (34) Suppose...
How do you know whem do use the z score or the t table
(34) Suppose there are 106 body temperatures having a mean of 98.20 ° F. Assume that the sample is an SRS and the population standard deviation σ is known to be 0.62 °F. Use a 0.05 significance level to test the common belief that the mean body temperature of healthy adults is equal to 98.6. (35) A study conducted a few years ago claims that the...
According to a recent study, the population of U.S. citizens spend, on average, 30 hours per...
According to a recent study, the population of U.S. citizens spend, on average, 30 hours per week watching television, with a standard deviation of 5.25 hours. If a random sample of n = 36 consumers is drawn from this population, what is the probability that the sample mean will be no more than 29.3 hours per week?
You see an article that claims that Americans spend an average of 5 hours per day...
You see an article that claims that Americans spend an average of 5 hours per day watching television with a standard deviation of 1 hour. a. Draw the distribution. b. Find the probability that a randomly selected person spends between 3 and 5 hours watching television. c. Find the percentage of people who spend more than 6 hours watching television. d. If a person is in the top 2.5%, what is the minimum amount of time that the person is...
Questions 16 & 22 16. At one school, the average amount of time that tenth-grades spend...
Questions 16 & 22
16. At one school, the average amount of time that tenth-grades spend watching television each week is 21.6 hours. The principlal introduces campaign to encourage the students to watch less television. One year later, the principal wants to performa hypothesis test to determine whether the average amount of time spent watching television per week has decreased or not. Find the correct null and alternative hypothesis. (a) Ho : ? < 21.6 H1 : ? > 21.6...
MSU conducted a study to find the average amount of time faculty members spend commuting to...
MSU conducted a study to find the average amount of time faculty members spend commuting to the University campus. They surveyed 196 faculty drivers and the study found out that the faculty driver’s population spent an average of 13 hours commuting with a standard deviation of 11 hours. (a) What is the standard error of the mean? (b) Compute the probability the sample mean is greater than 13 hours? (c) Compute the probability the sample mean is less than 12...
WPU conducted a study to find the average amount of time faculty members spend commuting to...
WPU conducted a study to find the average amount of time faculty members spend commuting to the University campus. They surveyed 196 faculty drivers and the study found out that the faculty driver’s population spent an average of 13 hours commuting with a standard deviation of 11 hours. (a) What is the standard error of the mean? (b) Compute the probability the sample mean is greater than 13 hours? (c) Compute the probability the sample mean is less than 12...
A sociologist claims that children spent more time watching television in 1981 than children do today....
A sociologist claims that children spent more time watching television in 1981 than children do today. A study was conducted in 1981 to find the time that children watched television on weekdays. Recently, a similar study was conducted. The results of these studies (in hours per weekday are shown below. Assume the population standard deviation is 0.7 for 1981 and 0.8 for today, At a = 0.05, can you support the sociologist's claim? Complete parts (a) through (d) below. Full...
A sociologist claims that children spent more time watching television in 1981 than children do today....
A sociologist claims that children spent more time watching television in 1981 than children do today. A study was conducted in 1981 to find the time that children watched television on weekdays. Recently, a similar study was conducted. The results of these studies (in hours per weekday) are shown below. Assume the population standard deviation is 0.7 for 1981 and 0.9 for today. At α =0.05, can you support the sociologist's claim? Complete parts (a) through (d) below. 1981 Recently...
2. WPU conducted a study to find the average amount of time faculty members spend commuting...
2. WPU conducted a study to find the average amount of time faculty members spend commuting to the University campus. They surveyed 196 faculty drivers and the study found out that the faculty driver's population spent an average of 13 hours commuting with a standard deviation of 11 hours. (a) What is the standard error of the mean? (b) Compute the probability the sample mean is greater than 13 hours? (c) Compute the probability the sample mean is less than...
A sociologist claims that children spent more time watching television in 1981 than children do t...
A sociologist claims that children spent more time watching television in 1981 than children do today. A study was conducted in 1981 to find the time that children watched television on weekdays. Recently, a similar study was conducted. The results of these studies (in hours per weekday) are shown below. Assume the population standard deviation is 0.7 for 1981 and 0.7 for today. At α=0.05, can you support the sociologist's claim? Complete parts (a) through (d) below. 1981 3.2 1.4...
How do you know whem do use the z score or the t table
(34) Suppose there are 106 body temperatures having a mean of 98.20 ° F. Assume that the sample is an SRS and the population standard deviation σ is known to be 0.62 °F. Use a 0.05 significance level to test the common belief that the mean body temperature of healthy adults is equal to 98.6. (35) A study conducted a few years ago claims that the...
Questions 16 & 22
16. At one school, the average amount of time that tenth-grades spend watching television each week is 21.6 hours. The principlal introduces campaign to encourage the students to watch less television. One year later, the principal wants to performa hypothesis test to determine whether the average amount of time spent watching television per week has decreased or not. Find the correct null and alternative hypothesis. (a) Ho : ? < 21.6 H1 : ? > 21.6...
A sociologist claims that children spent more time watching television in 1981 than children do today. A study was conducted in 1981 to find the time that children watched television on weekdays. Recently, a similar study was conducted. The results of these studies (in hours per weekday are shown below. Assume the population standard deviation is 0.7 for 1981 and 0.8 for today, At a = 0.05, can you support the sociologist's claim? Complete parts (a) through (d) below. Full...
2. WPU conducted a study to find the average amount of time faculty members spend commuting to the University campus. They surveyed 196 faculty drivers and the study found out that the faculty driver's population spent an average of 13 hours commuting with a standard deviation of 11 hours. (a) What is the standard error of the mean? (b) Compute the probability the sample mean is greater than 13 hours? (c) Compute the probability the sample mean is less than...
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