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A local children's boutique specializes in formal wear for young girls. It has recently hired a new seamstress. To assure the dresses have standard sizes, twenty samples of each 12 dresses that were labeled 3T were sampled. The average length from shoulder to hemline measured 21 inches with a range of 0.5 inches. A sample has just been taken with the following lengths: 21.25, 22.0, 21.5, 20.75, 21.25, 21.35, 21.35, 21.35, 21.35, 21.35, 21.35, and 21.35. Is the new seamstress performing at an acceptable quality level?
What is your conclusion regarding null hypothesis?
The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days and standard deviation of approximately 1 day.
What do you find out when you perform the nonparametric statistics?
Probability based on binomial distribution - evaluate the probability of x successes in the n independent trials of the experiment.
The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the emp..
The average age of the women was 45.582 with a standard deviation of 5.143. He uses this information to calculate a 95% confidence interval for the differnce in means, (-11.41, -5.422). The best interpretation of this interval is which of the foll..
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
What is the equation for this regression model?
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
What is the maximum error of estimate for p ?
Using standard methods for linear statistical prediction, find the percent increase in sales revenue that would be expected if the price were lowered by 15%. Find the usual measure of the strength of association between price reduction and sales re..
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30. (a) What is the probability that all the hotel's room will be rented?
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