The data below represents the total number of credit hours taken during one semester by 30...
1. The number of hours per week that 200 college students spend on the Internet is grouped into classes (0 − 3),(4 − 7),(8 − 11),(12 − 15),(16 − 19),(20 − 23),(24 − 27) with observed frequencies of 12, 25, 36, 45, 34, 31, and 17. The grouped mean and standard deviation are found from the data. The null hypothesis is that the data is normally distributed. Using the mean and standard deviation, the expected frequencies are found to be...
Question 1. Thirty graduate students were asked how many credit hours they were taking in the current quarter. Download the available data: Calculate the mean, median, standard deviation, variance, and range for this sample using Excel. Write a sentence explaining what each measure means. What is the standard error of the mean based on the data? What would be the best point estimate for the population credit hours? (“Population” refers to all graduate students’ credit hours in the universe.) What...
conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and we recorded each student's age, final average, gender, # hours worked per week, race, and t attended this semester). Use the results from the following table to answer all parts of #2. he attendance record (# of classes not Age 20 18 19 Final Average Gender # Hrs...
It is believed that the average credit hours of students is more than 13 hours. Using a 0.10 level of significance, should the findings of the Class Survey support the belief that the average credit hours is more than 13 hours. The population standard deviation is not known. Data set(credit hours): Credit Hours 9 11 11 9 9 6 9 7 4 6 12 6 15 6 12 3 14 9 10 12 15 9 12 7 16 12 12...
The following frequency table represents the ages of children living in one apartment complex for 56 children. What is the 3rd quartile of the data? 1 1 2 2 3 3 3 3 4 4 5 5 5 5 6 6 6 8 8 8 9 9 9 9 9 9 10 10 11 11 11 11 11 11 12 12 12 13 13 13 14 15 15 16 16 16 17 17 18 18 18 18 18 18 18...
Question 1 The marks obtained by 30 students in a subject are given below: 15,20,21,22,35,40,45,16,31,22,26,29,18,41,49,43,48,23,28,32,36,38,24,29,30,46,42,44,25,50 Arrange the data into 8 classes with equal class interval and then find the mean of this grouped data. Question 2 Find the quartile deviation of the following data. 10, 25, 11, 19, 10, 29, 15, 14, 17
1. The data set on sheet #1 gives data on GPA category and number of hours studied. Construct comparative box plots of the data first GPA category. Then conduct two-sample t-test on the data for whether GPA category influences the number of hours studied. Be prepared to explain the results of the test and the meaning of the boxplots and how they relate to each other. Then redo the analysis by replacing the ordinal GPA category with a numerical dummy...
6. Use the Credit Hour data provided on the first page to complete the frequency table below using 4 classes. Enter all values in the chart below before moving on to #7 Excel directions for the histogram Class width=(max-min)/4= (always go up to the next whole number) Class Frequency Midpoint Excel Statistics Graphs Lab Page 3 2. The same twenty Math 1109 students also reported the number of Credit Hours that they are enrolled in this term: 8 11 12...
5) The table below shows the number of hours spent per week viewing TV (y), and the number of years of education (x) for 10 randomly selected individuals. 10 15 8 y (hours) x(years) 4 20 16 4 15 12 14 11 16 16 18 12 20 10 12 (15 Points) Find the simple linear regression model a) (10 Points) Find 95% confidence interval for B b) (5 Points) c) Calculate R2
Thank you The data below represents monthly sales for two years of beanbag animals at a local retail store (Month I represents January and Month 12 represents December). Given the time series plot below, do you see any obvious patterns in the data? Explain. Time series chat Saes 525 ? 450 375 300 225 150 75 3 1 2 3 4567 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Observation Number