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How much money does the average professional football fan spend on food at a single football game? That question was posed to 10 randomly selected football fans. The sampled results show that sample mean and standard deviation were $52.00 and $17.50, respectively. Use this information to create a 95% confidence interval for the mean.
According to Central Limit Theorem, how big of sample is essential to be sure sampling distribution of sample means is normally distributed.
Agricultural researchers are studying three different ways of planting peanuts to determine whether significantly different levels of production yield will result.
Change the last number in that set from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Assume a one-tailed t -test is being applied to determine if population mean is less than $212. Level of significance chosen is 0.01 and 26 accounts are sampled. Determine the critical value?
Toledo, OH has been experiencing improved economic growth following huge capital investments from companies like Chrysler. You have just been hired by RGP, an agency for facilitating business expansion and location in the Toledo metropolitan area.
Describe the sampling distribution of the sample proportion
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Mathml equation = $32,000 and mathml equation = $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
If the population mean is 36, are the serial killers significantly more introverted at the .05 level? Perform the appropriate one-tailed test.
Given that the average monthly amount charged is uniformly distributed, what percent of monthly charges are between $100 and $1100?
If the company's report is correct, what is the probability that the average balance of an account in the sample is $383 or less?
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
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