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Computing probability values using normal distribution.
A sample of 500 evening students revealed that their annual incomes from employment in industry during the day were normally distributed with a mean income of $30,000 and a standard deviation of $3,000.How many students earned between $20,000 and $40,000?
Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
Make a stem plot for the men height data. Calculate the five-number summary for the women.
Then use ogive to estimate median and first and third quartiles. Also utilize it to reply following question: What percent of 60 mutual fund loads are less than 75.
In this paragraph, be sure to make it clear how you handled the issue of conducting three planned comparisons. Also provide the ANOVA summary table for these results.
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
Find out the test statistic P-value, and critical value, and state the final conclusion. The mean IQ score of statistic professors is less than 120. Sample data: n = 46. Suppose that = 17, and the significance level is = 0.05.
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
Use normal approximation to determine probability that x = 2. Illustrate all work.
In general, determine the standard score a measure of?
Determining the probability that the two choose the same number?
Using 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
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