Confidence interval for the population proportion
This past year, a Gallup poll surveyed 1228 households in the U.S about gun ownership. Of those surveyed, 435 said they had at least one gun in their home. Find and interpret the 95% confidence interval for the population proportion.
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Assume that Goodhealth clinic has fixed costs of $ 1million and a total cost forecast of $1.5 million at a volume of 20,000 patient visits. What is the clinic's variable cost rate?
A random sample of 44 UNLV students is taken. The average age in the sample was 20.2 years with a standard deviation of 3.4 years. Construct and interpret a 95 % confidence interval for the average age of the population.
A straight wire in a magnetic field experiences a force of 0.034 N when the current in the wire is 2.5 A. The current in the wire is changed, and the wire experiences a force of 0.042 N as a result. What is the new current?
Stock in Dragula Industries has a beta of 1.2. The market risk premium is 6 percent, and T-bills are currently yielding 4.90 percent. The company's most recent dividend was $1.30 per share, and dividends are expected to grow at a 8.0 percent annua
Knowing that the length of the cord is 3 feet and that the max allowable tension in the cord is 10-lb, determine (a)the max allowable speed, (b) the corresponding value of the angle theta.
The mean score for girls was 11.1 with a standard deviation of 3.2. Is there a significant difference between groups? Be sure to state H0, state H1, calculate and state the test statistic, and provide the decision/conclusion statement.
A 0.49·kg mass vibrates according to the equation x = 0.45 cos (8.36t + 1.05), where x is in meters, and t is in seconds. (a) Determine the amplitude. (b) Determine the frequency.
You tell your audience that you ran a t-test to compare the depression levels of 1000 people taking the medication to 1000 people not taking the medication. You point out that the mean level of depression for medication users is 10.1 and the mean
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