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1. A normally distributed population has a mean µ=32 and a standard deviation ?=7. For a set of samples of size 8 taken from this population, about 99.7% of the means will be in what interval?
Can someone please answer and explain.
Bingo Hamburger Co has a chain of 12 stores in a large city. Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data & predict profit for a store assuming sales of $10 million.
Question 1: In a certain city with a population of 1 million people, 5,000 people died last year. In the same city 10,000 were known to have cancer last year, of whom 500 died.
The world's smallest mammal is the bumblebee bat. Shown to the right are weights(in grams) from a sample of those bats. Use the traditional method and significance level of .05 to test the claim that these bats come from the same population having..
In a recent study, a random sample of children in grades two through four showed a significant negative relationship between the amount of homework assigned and student attitudes. What is the explanatory variable and what is the response variable?
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
You are thinking of employing a t-procedure to test hypotheses about the mean of a population using a significance level of 0.05.
In a specific company, there are three levels of workers: skilled, unskilled, and manager. The owner of this company wants to know if the level of job satisfaction differs amongst the three levels of workers.
Compute the Relative risk (RR) of ADR with Drug A compared to Drug B. Show all calculation. Interpret the RR value. Do you arrive at the same conclusion based on the OR estimate and RR?
suppose xis a random variable with mean -5 and variance 2. what can you say about the probability that x deviates from
1.below is a normal plot of residuals from a regression. does the plot indicate any problems with the assumption that
consider the following question.a girl having two siblings is chosen at random. what is the probability that she has no
A lab test is 95% effective in detecting a disease. The test gives a false positive (reports the patient has disease when they do not) for 1 % of the healthy population tested.
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