The following data are the number of hours spend by a student who plays online games for a week. Solve for the mean, variance and standard deviation of the probability distribution table. Show its histogram. Show the solutions. X 0 1 2 3 4 5 6 P(X) 0.05 0.1 0.2 0.3 0.2 0.1 0.05
Added by -Ngel B.
Close
Step 1
Mean = (0.3 * 0) + (0.2 * 1) + (0.1 * 2) + (0.05 * 3) + (0.05 * 4) + (0.1 * 5) + (0.2 * 6) Mean = 0 + 0.2 + 0.2 + 0.15 + 0.2 + 0.5 + 1.2 Mean = 2.45 Show more…
Show all steps
Your feedback will help us improve your experience
Maujee Lal and 53 other Algebra educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
According to a recent study, the mean number of hours college students spent playing video games per month was 31 hours with a population standard deviation of 4 hours. Two weeks before final exams were scheduled to begin, 100 college students were randomly selected. What is the probability that the mean number of hours spent playing video games is less than 30.5 hours? Use the z-table below. Round your answer to three decimal places if necessary.
Lien L.
The data in the following table reflect the amount of time 40 students in a section of Statistics 101 spend on homework each day. Minutes frequency x x - μ (x - μ)² x² 0-14 2 15-29 4 30-44 10 45-59 16 60-74 6 75-89 2 Table 1 a. Fill in the blank in Table 1 (16 marks) b. Calculate Variance. (2 marks) c. Calculate Standard Deviation. (2 marks) (Total : 20) 2. Find the standard deviation for the following frequency distribution. Length (mm) frequency 10-12 3 13-15 6 16-18 12 19-21 9 22-24 2 Table : 2 (10 marks)
Sri K.
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 0.9 hours. Refer to Exhibit 1. With a 0.95 probability, the margin of error is approximately: 0.196 0.20 1.64
Robin C.
Recommended Textbooks
Elementary and Intermediate Algebra
Algebra and Trigonometry
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD