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Someone working for a survey organization approached thefirst 100 students they saw on campus, and noted that 52 of these students were female and 48 of these students were male. From the registar's data for that year, 25,000 students were enrolled, and 62% were male. Was this sampling procedure like taking a simple random sample? Explain your answer briefly
Using Chi-square table finding the P-value and interpret the result
then lengths of a certain component are normally distributed with a mean of 250 mm and a standard deviation of .6mm.
a container contains 15 diesel engines. the company chooses 12 engines at random and will not ship the container if any
Telephone calls arrive at a switchboard in a Poisson process at the rate of 2 per minute. A random one-tenth of the calls are long distance.
q1. consider throwing 2 usual dice. in each play we observe the number of dots that stay on top sum the returned result
in a gallop poll of 1005 randomly selected americans in april 2006 482 responded yes to the question do you consider
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Using the critical value approach and the sample information reported below, carry out a test of this statement. Let α = 0.05.
suppose that in the baltimore metropolitan area 25 of the crimes occur during the day and 80 occur in the city. if
Is it reasonable for the manufacturer to claim that the drill bits will last 2.5 hours?
Using this data, is there enough evidence that the average depth of the ice sheet is below 3140 m? Assume that the depth of the ice sheet is normally dstributed. Use a test of hypotheses of level alpha = 0.05.
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
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