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1. What are the most common causes of missing data, and what difficulties do missing data cause? What can be done if data are missing?
2. Comment on the circumstances under which a researcher would consider deleting one or more responses, participants, or variables from analysis.
consider the following bivariate datapointabcdefghijx7405065257y7107170375a calculate the covariance. give your answer
Scores range from 0 to 200. The mean score for students who live on the west coast is about 115. Construct a 90% confidence interval for the unknown mean of the students on the east coast.
Construct a histogram from this set of data and identify the sample shares for each of the listed manufacturers. Excluding the data referred to as "other," determine the total share of the sample for manufacturers that have headquarters in the Unit..
Two cards are drawn from a standard deck of cards. Determine the probability that the first card is a Heart and the second card is an Ace.
shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the wind
Findout the variance also standard deviation for the 2 distributions above. Evalute the variation of the data sets.
a. Create a single index series for prices with Year 0 as the base year. b. Create a single index series for wages with Year 0 as the base year.
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
Determine a simple algebraic relationship between the negative binomial probability P(x) and the binomial probability for the probability of n successes in x trials.
a pair of fair six-sided dice are tossed independently of each other.a list the sample space of this experiment.b
Using standard normal table, show critical value for left-tailed test with α = 0.02.
The mean weight of 500 students is 151 lbs and the standard deviation is 15 lbs. Assuming the weights are normally distributed, find out how many students weigh between 120 and 155 lbs.
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