The Teenage Attitudes and Practices Survey obtained completed questionnaires, either by telephone or by mail, from a randomly selected group of 9965 respondents between the ages of 12 and 18 living in households across the country. One type of question asked the teenagers being interviewed about the perceived behavior of their peers. The teenagers answering the questions are classified as...

Aug 21 2021

To examine the effects of pets and friends in stressful situations, researchers recruited 45 people to participate in an experiment. Fifteen of the subjects were randomly assigned to each of three groups to perform a stressful task alone (control group), with a good friend present, or with their dog present. Each subject's mean heart rate during the task was recorded. Test the appropriate...

Jul 30 2021

Provide a brief explanation about snowball sampling method? In what conditions are this type of sampling method most suitable? Provide your own example.

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Jul 29 2021

The owner of a moving company typically has his most experienced manager predict the total number of labor hours that will be required to complete an upcoming move. In a effort to provide a more accurate method, the owner has decided to use the number of cubic feet moved as the independent variable and has collected data for 20 moves in which the travel time was an insignificant portion of the...

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Jul 27 2021

The number of monthly breakdowns of a super computer is a random variable having a Poisson distribution with ? = 1.8. Use the formula for the Poisson distribution to find the probabilities that this computer will function (a) without a breakdown; (b) with only one breakdown.

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Jul 27 2021

The number of minutes between successive bus arrivals at Alvin's bus stop is exponentially distributed with parameter ? , and Alvin's prior PDF of ? is (a) Alvin arrives on Monday at the bus stop and has to wait 30 minutes for the bus to arrive. What is the posterior PDF. and the ? IAP and conditional expectation estimates of E>? (b) Following his Monday experience. Alvin decides to estimate ?...

Jul 27 2021

The number of families who used the Minneapolis YWCA day care service was recorded over a 30-day period. The results are as follows: 31, 49, 19, 62, 24, 45, 23, 51, 55, 60, 40, 35, 54, 26, 57, 37, 43, 65, 18, 41, 50, 56, 4, 54, 39, 52, 35, 51, 63, and 42. a. Construct a cumulative frequency distribution of this data. b. Sketch a graph of the cumulative frequency polygon. c. How many days saw fewer...

Jul 27 2021

The number of accidents that occur at a busy intersection is Poisson distributed with a mean of 3.5 per week. Find the probability of the following events: a. No accidents in one week b. Five or more accidents in one week c. One accident today

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Jul 27 2021

The tied three-hinged arch is subjected to the loading shown. Determine the components of reaction at A and C, and the tension in the rod

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Jul 26 2021

Out of 5 Mathematician and 7 Statistician a committee consisting of 2 Mathematician and 3 Statistician is to be formed. In how many ways this can be done if a) There is no restriction b) One particular Statistician should be included c) Two particular Mathematicians can not be included on the committee.

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Jul 25 2021

- Basics of Statistics
- Descriptive Statistics
- Central Tendency
- ANOVA
- Hypothesis Testing
- Regression
- Time Series Analysis
- Applied Statistics
- Operational Research
- Stochastic processes
- Statistics - Others
- Theory of probability
- Correlation, Regression
- Biostatistics
- Statistical Quality Control
- Quantitative Analysis
- Markov Analysis
- Forecasting
- Stratified Random Sampling