The television habits of 30 randomly selected children were observed. The sample mean of time watching...

The television habits of 30 randomly selected children were observed. The sample

mean of time watching TV was found to be 48.2 hours per week, with a standard

deviation of 12.4 hours per week. Test the claim that the children on average

spend more than 47 hours per week watching TV.

sig. level .05

Expert Solution

(5) Conclusion

It is concluded that the null hypothesis Ho is not rejected. Therefore, there is not enough evidence to claim that the

children on average spend more than 47 hours per week watching TV at the 0.05 significance level.

orchestra answered 1 year ago

A sociologist claims that children ages 3 - 12 spent more mean time watching television in...

A sociologist claims that children ages 3 - 12 spent more mean time watching television in 1981 than children ages 3 - 12 do today. A study was conducted in 1981 and a similar study was recently conducted. At alphaα = 0.025, can you support the sociologist's claim? Sample 1 Sample 2 1981 Study 2.5 2.1 2.3 Recent Study 1.9 2.0 1.6 1.6 2.6 2.1 1.5 2.1 2.3 2.2 1.0 1.9 1.6 1.8 0.9 Calculate the Test Statistic and P-value....

1. A sociologist claims that children ages 6-17 spend less time watching television today than children...

1. A sociologist claims that children ages 6-17 spend less time watching television today than children ages 6-17 in 200 1 did. A study was conducted recently and a similar study was conducted in 2001. The results are given below: Recently 2001 Mean amount of time ( hours per weekday) 1.76 2.13 Sample standard deviation 0.47 0.49 Sample Size 40 35 a. Test the claim of the sociologist at 10% level of significance. Use classical approach and label all steps...

A sample of 30 randomly selected student cars have ages with a mean of 7.3 years...

A sample of 30 randomly selected student cars have ages with a mean of 7.3 years and a standard deviation of 3.6 years, while a sample of 19 randomly selected faculty cars have ages with a mean of 5 years and a standard deviation of 3.7 years. 1. Use a 0.01 significance level to test the claim that student cars are older than faculty cars. (a) The test statistic is ??? (b) The critical value is ??? (c) Is there...

When 75 patients were randomly selected, the mean length of wait time was found to be...

When 75 patients were randomly selected, the mean length of wait time was found to be 28 days and the standard deviation was 5.6 days. Because of waiting issues, wait times would slightly go up. What would be the steps to test the claim that wait times have a mean of LESS THAN 38 days if you used a 0.05 significance level?

The following sample observations were randomly selected:

The following sample observations were randomly selected:12345X:213832Y:18132249 a. Not available in Connect.b. Determine the regression equation.(Negative answer should be indicated by a minus sign. Do not round intermediate calculations. Round the final answers to 4 decimal places.) b = a =Y' = + X c. Determine the value of Y' whenX is 11. (Do not round intermediate calculations. Round the final answer to 4 decimal places.)

The chassis assembly time for a television set is observed for two operators. A random sample...

The chassis assembly time for a television set is observed for two operators. A random sample of 12 assemblies from the first operator gives an average assembly time of 22 minutes with a standard deviation of 3.5 minutes. A random sample of 10 assemblies from the second operator gives an average assembly time of 20.3 minutes with a standard deviation of 2.2 minutes. a. Find a 90% confidence interval for the ratio of the variances of the operators' assembly times....

In a time-use study, 20 randomly selected college students were found to spend a mean of...

In a time-use study, 20 randomly selected college students were found to spend a mean of 1.4 hours on the internet each day. The standard deviation of the 20 scores was 1.3 hours. Construct a 90% confidence interval for the mean time spent on the internet by college students. Assume t* = 1.729 If you increased the sample size for the problem above, what would happen to your confidence interval, assuming the sample mean and standard deviation remain unchanged?

I. The members of a very large health club were observed on a randomly selected day....

I. The members of a very large health club were observed on a randomly selected day. The distribution of times they spent that day at the health club was found to have a mean of 91.8 minutes and a standard deviation of 16.2 minutes. Suppose these values of the mean and standard deviation hold true for all members of this club. 1. Find the minimum percentage of this health club's members who spend time at this health club between 51.3...

Body temperatures were recorded on 25 randomly selected healthy humans. The sample mean was 98.20 F...

Body temperatures were recorded on 25 randomly selected healthy humans. The sample mean was 98.20 F and the sample deviation was .68 F. a. Using the sample statistics, construct a 99% confidence interval estimate of the mean body temperature of all healthy humans.

1.In a study, 1,319 children at the age of 12 were randomly selected to be questioned...

1.In a study, 1,319 children at the age of 12 were randomly selected to be questioned on the prevalence of symptoms of severe cold. A second sample of 1,319 children at age 14 were random selected to be questioned on the prevalence of symptoms of severe cold. Among the 12 year olds, 356 children were reported to having severe cold symptoms in the past 12 months, while among the 14 year olds, 468 reported to having severe cold symptoms in...

Question