Mathematics, 12.11.2019 03:31 siri5645
Confidence intervals of a population mean1.now suppose you do not know the population mean fee charged to h& r block customers last year. instead, suppose you take a sample of size n=40 and find a sample mean of 175. assume that the distribution for fees is normally distributed with a population standard deviation of $50.a. calculate the standard error of x (line over x)b.95% confidence interval for the population mean of fees at h& r block. i.calculate the margin of error (moe) of using a 5% significance level. ii. calculate the 95% confidence interval. iii. write one complete sentence about the interpretation of the confidence interval. a.90% confidence interval for the population mean of fees h& r block. i.calculate the margin of error (moe) of using a 10% significance level. ii. calculate the 90% confidence interval. iii. suppose an analyst belief that the population mean fee is equal to $185. using a 90% confidence level. can we conclude the analyst is right? why or why not? show every step!
Answers: 2
Mathematics, 21.06.2019 14:00
Bob’s bank charges him a $3.15 service fee every time he uses an out-of-network atm. if bob uses an out-of-network atm an average of three times every two weeks, how much will he pay in service fees over the course of a year? a. $327.60 b. $109.20 c. $491.40 d. $245.70 select the best answer from the choices provided a b c d
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Mathematics, 21.06.2019 16:50
Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.
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Mathematics, 21.06.2019 17:20
Read the equations in the table below. then drag a description of the situation and a table to represent each equation. indicate whether each of the relationships is proportional or non-proportional.
Answers: 1
Confidence intervals of a population mean1.now suppose you do not know the population mean fee charg...
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