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Let selling price be the dependent variable and size of the home the independent variable. Determine the regression equation. Estimate the selling price for a home with an area of 2,200 square feet. Determine the 95 percent confidence interval and the 95 percent prediction interval for the selling price of a home with 2,200 square feet.
Additionally, method of delivery of drug (patch,pill, or nasal mist) was considered. In experiment, there were how many treatments?
Time spent using email per session is normally distributed with μ = 8 minutes and σ = 2 minutes. a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?
A test was conducted to find out whether gender of a spokesperson affected the likelihood that consumers would prefer a new product. A survey of consumers at trade show employing a female spokesperson determined that 70 out of 150 customers prefe..
How would you communicate this information to the Vice-President of Human Resources in non-statistical language.
To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with:
A random sample of 100 oranges is gathered and the mean diameter obtained was 5.12. If another sample of 100 is taken, what is the possibility that its sample mean will be greater than 5.12 inches.
When would you use a two population test with a small sample size at your place of employment, in your education, or in politics?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
The mean SAT verbal score is 412, with a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 412 and 592.
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
If you were designing a study which group, a population or a sample, would you gather data from and why? Provide an explanation regarding whether or not the standard deviation is a biased or unbiased estimate.
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