Homework Answers
Solution:
This is a two tailed test.
The null hypothesis is,
Ho: 
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You are testing an hypothesis about how much time preschool children watch television per day. You hypothesize that...
A survey is being planned to determine the average amount of time preschool children watch television....
A survey is being planned to determine the average amount of time preschool children watch television. A pilot survey indicated that the mean time per week is 12 hours, with a standard deviation of 3 hours. It is desired to estimate the mean viewing time within one-quarter hour. The 0.95 degree of confidence is to be used. How do you calculate how many preschool children should be surveyed? Why is it important to make sure your sample size is sufficient?
Research examining the effects of preschool child care has found that children who spent time in...
Research examining the effects of preschool child care has found that children who spent time in day care, especially high-quality day care, perform better on math and language tests than children who say home with their mothers (Broberg, Wessels, Lamb, & Hwang, 1997). In a typical study, a researcher obtains a sample of n = 10 children who attended day care before starting school. Then children are given a standardized math test for which the population mean is μ =...
Stats leab 9.1 Hypothesis Testing of a Single Mean and Single Proportion Class Time: Names: Student...
Stats leab 9.1 Hypothesis Testing of a Single Mean and Single Proportion Class Time: Names: Student Learning Outcomes • The student will select the appropriate distributions to use in each case. The student will conduct hypothesis tests and interpret the results. Television Survey In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that o = 2. Using your class as the sample, conduct a hypothesis test to determine if the average...
Help with this question please! Data were collected about the time per day children 8 to...
Help with this question please!
Data were collected about the time per day children 8 to 18 years old spent with various types of media. The following table reports the average time the children spent with each media category Media Television content Music/audio Computer Video games Print Movies Time 4 hours 29 minutes 2 hours 31 minutes 1 hour 29 minutes 1 hour 13 minutes 38 minutes 25 minutes Construct a display that best describes these data.
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...
Television Survey In a recent survey, it was stated that Americans watch television on average four...
Television Survey In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that o = 2. Using your class as the sample, conduct a hypothesis test to determine if the average for students at your school is lower 1. Ho: 2. H 3. In words, define the random variable. 4. The distribution to use for the test is S. Determine the test statistic using your data. 6. Draw a graph and label...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 351 patients showed the mean wait time was 23.15 minutes, with a standard deviation of 16.06 minutes. Complete parts (a) and (b) below. a. If you test the null hypothesis at the 0.10 level of significance, is there evidence that the population mean wait time is less than 25 minutes? State...
please help 0, In E xercise 6 watched per day. We saw that as education increases, hours of television viewing decreases. The number of children a family has could also affect how much televisio...
please help
0, In E xercise 6 watched per day. We saw that as education increases, hours of television viewing decreases. The number of children a family has could also affect how much television is viewed per day Having children may lead to more shared and supervised viewing and thus increases the num- ber of viewing hours.The following SPSS output displays the relationship between television viewing (measured in hours per day) and both education (measured in years) and number of...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 362 patients showed the mean wait time was 23.16 minutes, with a standard deviation of 16. 1 minutes. Complete parts (a) and (b) below. a. If you test the null hypothesis at the 0.05 level of significance, is there evidence that the population mean wait time is less than 25 minutes?...
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...
Stats leab 9.1 Hypothesis Testing of a Single Mean and Single Proportion Class Time: Names: Student Learning Outcomes • The student will select the appropriate distributions to use in each case. The student will conduct hypothesis tests and interpret the results. Television Survey In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that o = 2. Using your class as the sample, conduct a hypothesis test to determine if the average...
Help with this question please!
Data were collected about the time per day children 8 to 18 years old spent with various types of media. The following table reports the average time the children spent with each media category Media Television content Music/audio Computer Video games Print Movies Time 4 hours 29 minutes 2 hours 31 minutes 1 hour 29 minutes 1 hour 13 minutes 38 minutes 25 minutes Construct a display that best describes these data.
Television Survey In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that o = 2. Using your class as the sample, conduct a hypothesis test to determine if the average for students at your school is lower 1. Ho: 2. H 3. In words, define the random variable. 4. The distribution to use for the test is S. Determine the test statistic using your data. 6. Draw a graph and label...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 351 patients showed the mean wait time was 23.15 minutes, with a standard deviation of 16.06 minutes. Complete parts (a) and (b) below. a. If you test the null hypothesis at the 0.10 level of significance, is there evidence that the population mean wait time is less than 25 minutes? State...
please help
0, In E xercise 6 watched per day. We saw that as education increases, hours of television viewing decreases. The number of children a family has could also affect how much television is viewed per day Having children may lead to more shared and supervised viewing and thus increases the num- ber of viewing hours.The following SPSS output displays the relationship between television viewing (measured in hours per day) and both education (measured in years) and number of...
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 362 patients showed the mean wait time was 23.16 minutes, with a standard deviation of 16. 1 minutes. Complete parts (a) and (b) below. a. If you test the null hypothesis at the 0.05 level of significance, is there evidence that the population mean wait time is less than 25 minutes?...
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...
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