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The amount of money spent by a customer at a discount store has a mean of $100 and a standard deviation of $30. What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5700? The total will be more than $5700 when the sample average exceeds what value?
Let us suppose you have taken 100 samples of size 49 each from normally distributed population. Compute standard deviation of sample means if population's variance is 16. Area to left of ‘z' is 0.9976.
The hypothesis is that the average number of customers served per hour is 24 or less against the alternative hypothesis that the mean number of customers waiting is greater than 24.
Random sample of 64 lightbulbs indicates a sample mean life of 350 hours. At a 5% level of significance, is the mean life more than 375. Which of the following is your two hypotheses?
Given that the mean of 100 observations is 42.5 and that their standard deviation is 6.313, find the sum of the squares of the observations.
Write a brief summary report on the demographic and class distribution of this sample. Paste the tables and charts into your report and label each of them properly.
A furniture store claims that a specially ordered product will take, on average, mean= 35 days (5 weeks) to arrive. The standard deviation of these waiting times is 5 days.
Beta and required rate of return stock has required return of 11%; risk-free rate is 7%t; and market risk premium is 4 %. Determine the stock's beta?
There a flu epidemic that is spreading across SF County. You are a principle and are in charge of 32 teachers. You want to plan ahead and be able to estimate how many substitute teachers the school may need during this epidemic.
The food distributor selects a sample of stores located in areas where he believes the shoppers are receptive to trying new products. What type of sampling does this represent?
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
We wish to create this mean value interval for selling price with 95% confidence level. Find out the best point estimate (average) for selling price. Critical t-value(s) associated with 95% confidence level.
This second sample had an average response of 132 with a sample variance of 16. What is the pooled standard deviation for this problem?
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