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In a family of 4 children:
a) List all the ways there can be 2 girls and 2 boys.b) Find the probability that there are 2 girls and 2 boys.c) What are the odds for having 2 girls and 2 boys?
Find the least-squares regression line to predict chirps per second based on temperature. increase in temperature. Predict the chirps per second if it is 83.3 degrees.
Graph the relationship between the two variables and is there sufficient evidence to infer that height and length of index fingers are linearly related?
A private medical clinic wants to estimate the true mean annual income of its patients. If the confidence level is 95%, find the required sample size in order to meet the needs.
Find out the expected number of correct responses under these circumstances if one in fact selects the responses at random. What is the standard deviation?
a sample of data on daily prices of three petrol stations over a two week period have been collected in the table
Assume that the average person in America weighs 150 pounds (μ). You want to determine whether colleges students weigh less than the average America, Following are the weights collected on a sample of colleges students: 120, 105, 166, 170, 145, 14..
the u.s. department of transportation reported that during november 83.4 of southwest airlines flights 75.1 of us
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
Agriculture books. The R.R Bowker Company collects information on the retail prices of books and publishes the data in the Bowker annual library and book trade almanac.
In the new poll, if the proportion favoring the incumbent has not changed, what is the mean and standard deviation of the number preferring the incumbent?
The maximum allowable payback and discounted payback statistic for the project are 2 and 2.5 years, respectively. Use the NPV decision rule to evaluate this project; should it be accepted or rejected?
Lengths had a calculated sample standard deviation of 8 and mean of 9.4. Select the 95% confidence for the true variance of the product lengths. Use the appropriate table in the book.
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