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A survey showed that 17% of households spend more than $100 per week on groceries. Assume the population proportion is 0.17 and a simple random sample of 850 households will be selected from the population. What is the probability that the sample proportion will be within ±0.02 of the population proportion?
Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
Computing probability values using normal distribution - Find the proportion of the observations will fall in the interval from 40 to 60?
Determine the following:Mean, Median and Variance.
In 1,000 samples, assuming that H 0 is true, how many times would you expect to commit Type I error if:
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots. A partial ANOVA table
USA Today reported that 11% of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day, what is the probability that
In fitting the simple linear regression model Yi ~ N (α + β xi, σ 2 ) to the following data:
If the population mean was $1047 in the previous year, does the evidence suggest that expenditure this year has significantly changed?
At 0.05 level of significance, is there evidence of significant relationship between age group and where people mainly get their news? If so, describe the relationship.
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
Caselet on McDonald’s vs. Burger King - Waiting time
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