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What does bivariate normal distribution mean? Explain in words or illustrate with a figure.
You work in the corporate office for a nationwide convenience store franchise that operates nearly 10,000 stores. The per-store daily customer count has been steady,
A sample, in hour's of life, is as follows:: 123, 116, 122, 110, 180, 126, 125 Find all Measures of Location (Central Tendency) and Measures of Variability (Dispersion or Variation).
you randomly select 20 supermarkets and measure the temperature of their coolers. the sample mean temperature is 43.0f
for the data set below if you were to fit a regression equation what would the value of r2 be to two decimals? hint
In a random sample of 328 florida public school employees, 231 were female. write a 95% confidence interval for the proportion of the population of florida public school employees that are female.
Explain briefly and in nontechnical language what "a significant difference (P
The standard deviation of test scores on a certain achievement test is 11.4. A random sample of 100 scores on this test had a mean of 71.2. Based on this sample, find a 90% confidence interval for the true mean of all scores. Complete the below:
Company wishes to know how many pounds of each chemical ingredient to put into the bag of fertilizer to meet minimum needs of 20 ounces of nitrogen, 36 ounces of phosphate, and 2 ounces of potassium during minimizing cost.
we want to take a sample of 100 items out of a large batch for quality control purposes. based on past history the
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Assume if random samples of size n = 9 are selected can we say anything about the distribution of sample means.
Normally distributed with an average of 125 minutes and a standard deviation of 18 minutes. What is the probability that a student taking this test will finish in 100 minutes or less?
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