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Total 100.0 99.9 100.0 6. How many hours per week do you spend on e-mail? Data...
A sample of 200 high school students were asked how many hours per week they spend...
A sample of 200 high school students were asked how many hours per week they spend watching television. The following frequency distribution presents the results. Time Spent Watching Television Number of hours Frequency 0.0-3.9 38 4.0.7.9 38 8.0-11.9 34 12.0-15,9 23 16.0-19.9 24 20.0-23.9 23 24.0-27.9 20
GSS asked in 2004 “About how many hours per week do you spend sending/answering email?” a...
GSS asked in 2004 “About how many hours per week do you spend sending/answering email?” a sample of eight males (age 75 and above) responded: 0,1,2,2,7,10,14,15 The sample mean and standard deviation of the results are given: sample mean= 6.375 hrs, s = 6.022 hrs How would I find the point estimate and standard error? Would I use a t chart to find the 90% Confidence Interval? How would I do so? How would the distribution be skewed? Would it...
Assume that the number of hours college students spend working per week is normally distributed with...
Assume that the number of hours college students spend working
per week is normally distributed with a mean of 18 hours and
standard deviation of 4 hours
2. Assume that the number of hours that college students spend working per week is normally distributed with a mean of 18 hours and a standard deviation of 4 hours. a. Mark the 7 hash marks on the x-axis with the appropriate labels in hours worked per week. Recall that the center hash...
A survey asked people, "How many hours do you spend watching reality TV shows per week?"....
A survey asked people, "How many hours do you spend watching reality TV shows per week?". From a random sample of 1200 people, sample mean was 9.5 and the (sample) standard deviation was 3.1 hours. Construct a 90% confidence interval for population mean A (6.4, 12.6) B. Cannot compute based on the given information. C-19.32, 9.68) D.(4.4, 15.6) E. (9.35, 9.65) QUESTION 20 (Continue from the previous question) what is the minimum required sample size to make sure that the...
The time married men with children spend on child care averages 5.8 hours per week (Time,...
The time married men with children spend on child care averages
5.8 hours per week (Time, March 12, 2012). You belong to a
professional group on family practices that would like to do its
own study to determine if the time married men in your area spend
on child care per week differs from the reported mean of 5.8 hours
per week. A sample of 40 married couples will be used with the data
collected showing the hours per week...
Question 2 Based on the 1988 National Survey of Families and Households, it was re- ported that men spent a mean of 18.1 hours per week doing housework. Suppose the standard deviation was 13.1 hours...
Question 2 Based on the 1988 National Survey of Families and Households, it was re- ported that men spent a mean of 18.1 hours per week doing housework. Suppose the standard deviation was 13.1 hours a normal distribution, sketch the approximat a Assuming e distribution of the number of hours that a randomly selected man spent doing housework in 1988 b Based on the graph in part (a), explain why the population distribution is very unlikely to be normal and...
4. Bob claims that men spend in average no less than 16 hours per week watching...
4. Bob claims that men spend in average no less than 16 hours per week watching TV. Random samples of 15 men were selected and each men was asked how many hours per week in average they watch TV. Data as follows: 12 26 35 44 19 36 24 33 6 12 25 11 27 31 51 a) Do you need any assumptions? If yes, make the assumption. b) State the null and alternative hypotheses: H0: v.s. H1 : c) Name the test and compute the p-value (specify the type of test). d) Your decision...
A sample of 200 college freshmen was asked how many hours per week they spent playing...
A sample of 200 college freshmen was asked how many hours per week they spent playing video games. The following frequency distribution presents the results. Number of Hours Frequency 1.0- 3.9 20 4.0- 6.9 32 7.0- 9.9 47 10.0- 12.9 28 13.0- 15.9 24 16.0- 18.9 18 19.0- 21.9 12 22.0- 24.9 7 25.0- 27.9 4 28.0- 30.9 8 1) What is the class width? 2) What percentage of students play video games for less than 19 hours per week?...
A random sample of 15 college students were asked "How many hours per week typically do...
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their 13 responses are shown on the right 31 13 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median 18 Which measure of central tendency better describes hours worked? 16 18 25 28 20 24 15 Choose the correct frequency histogram below Hours Worked per Week OA Hours...
6. Pedestrian Deaths A researcher wanted to determinse whether pedestrian deaths were uniformly distributed over the days of the week. She randomly selected 300 pedestrian...
6. Pedestrian Deaths A researcher wanted to determinse whether pedestrian deaths were uniformly distributed over the days of the week. She randomly selected 300 pedestrian deaths, recorded the day of the week on which the death occurred, and obtained the following results (the data are based on information obtained from the Insurance Institute for Highway Safety) Day of the Week Sunday Monday Tuesday Wednesday Frequency Day of Frequency the Week Thursday Friday Saturday 41 49 61 39 40 30 40...
A sample of 200 high school students were asked how many hours per week they spend watching television. The following frequency distribution presents the results. Time Spent Watching Television Number of hours Frequency 0.0-3.9 38 4.0.7.9 38 8.0-11.9 34 12.0-15,9 23 16.0-19.9 24 20.0-23.9 23 24.0-27.9 20
Assume that the number of hours college students spend working
per week is normally distributed with a mean of 18 hours and
standard deviation of 4 hours
2. Assume that the number of hours that college students spend working per week is normally distributed with a mean of 18 hours and a standard deviation of 4 hours. a. Mark the 7 hash marks on the x-axis with the appropriate labels in hours worked per week. Recall that the center hash...
A survey asked people, "How many hours do you spend watching reality TV shows per week?". From a random sample of 1200 people, sample mean was 9.5 and the (sample) standard deviation was 3.1 hours. Construct a 90% confidence interval for population mean A (6.4, 12.6) B. Cannot compute based on the given information. C-19.32, 9.68) D.(4.4, 15.6) E. (9.35, 9.65) QUESTION 20 (Continue from the previous question) what is the minimum required sample size to make sure that the...
The time married men with children spend on child care averages
5.8 hours per week (Time, March 12, 2012). You belong to a
professional group on family practices that would like to do its
own study to determine if the time married men in your area spend
on child care per week differs from the reported mean of 5.8 hours
per week. A sample of 40 married couples will be used with the data
collected showing the hours per week...
Question 2 Based on the 1988 National Survey of Families and Households, it was re- ported that men spent a mean of 18.1 hours per week doing housework. Suppose the standard deviation was 13.1 hours a normal distribution, sketch the approximat a Assuming e distribution of the number of hours that a randomly selected man spent doing housework in 1988 b Based on the graph in part (a), explain why the population distribution is very unlikely to be normal and...
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their 13 responses are shown on the right 31 13 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median 18 Which measure of central tendency better describes hours worked? 16 18 25 28 20 24 15 Choose the correct frequency histogram below Hours Worked per Week OA Hours...
6. Pedestrian Deaths A researcher wanted to determinse whether pedestrian deaths were uniformly distributed over the days of the week. She randomly selected 300 pedestrian deaths, recorded the day of the week on which the death occurred, and obtained the following results (the data are based on information obtained from the Insurance Institute for Highway Safety) Day of the Week Sunday Monday Tuesday Wednesday Frequency Day of Frequency the Week Thursday Friday Saturday 41 49 61 39 40 30 40...
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