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Expected value, variance and standard deviation.
A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows
Number of Service Calls
Probability
Number of service calls
0
0.1
3
0.2
1
0.15
4
2
0.3
5
a) What is the expected number of service calls?
b) What is the variance in the number of service calls? What is the standard deviation?
A university found that 20 percent of its students withdraw without completing the introductory statistics course. 20 students registered for a section of the course this term.
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Carry out an ANOVA and describe in detail in a BPS-formatted Results section:
The registrar of a college with a population of N=4,000 full-time students is asked by the president to conduct a survey to measure satisfaction with the quality of life on campus.
A sociologist wants to describe if the life expectancy of people in Africa is lesser than the life expectancy of people in Asia.
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
Give a mathematical expression for the probability density function of driving distance.
Find the probability that a randomly selected employee earns less than $5.43.
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
Which of the following would have a binomial distribution and evaluate the binomial coefficient
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