Sampling model for the average amount

Reference no: EM131008733

1. A sample of 40 games sold for the iPad has prices that have a distribution that is skewed to the high end with a mean of $3.48 and a standard deviation of $2.23. Teens who own iPads typically own about 20 games. Using the 68-95-99.7 Rule, draw and label an appropriate sampling model for the average amount a teen would spend per game if they had 20 games, assuming those games were a representative sample of available games.

2. Statistics for the closing price of the USAA Aggressive Growth Fund for the year 2009 indicate that the average closing price was $23.90, with a standard deviation of $3.00. Using the 68-95-99.7 Rule, draw and label an ap- propriate sampling model for the mean closing price of 36 days' closing prices selected at random. What (if any- thing) do you need to assume about the distribution of prices? Are those assumptions reasonable?

Reference no: EM131008733

Questions Cloud

Distribution model for sample proportions : Explain how these histograms demonstrate what the Central Limit Theorem says about the sampling distribution model for sample proportions. Be sure to talk about shape, center, and spread.

Deviation of sampling distribution of the proportion : A marketing researcher for a phone company surveys 100 people and finds that that proportion of clients who are likely to switch providers when their contract expires is 0.15. a) What is the standard deviation of the sampling distribution of the..

Cholesterol level of the sample : As in Exercise 9, cholesterol levels in healthy U.S. adults average about 215 mg/dL with a standard deviation of about 30 mg/dL and are roughly Normally distributed. If the cholesterol levels of a sample of 42 healthy US adults is taken, what is t..

Sampling distribution of the mean : What shape should the sampling distribution of the mean have? What would the mean of the sampling distribution be?

Sampling model for the average amount : Teens who own iPads typically own about 20 games. Using the 68-95-99.7 Rule, draw and label an appropriate sampling model for the average amount a teen would spend per game if they had 20 games, assuming those games were a representative sample of..

Develop an ids with the use of the material : Develop an IDS with the use of the material provided. The ids must detect as many attacks as possible and you must report them in a human readable format.

Proportion of vistors to the eiffel tower : A tourist agency wants to know what proportion of vistors to the Eiffel Tower are from the Far East. To find out they survey 100 people in the line to purchase tickets to the top of the tower one Sunday afternoon in May. Are all the assumptions an..

Sampling distribution of the observed proportion : The proportion of adult women in the United States is approximately 51%. A marketing survey telephones 400 people at random. a) What is the sampling distribution of the observed proportion that are women?

Find equation of least-squares line to predict compressive : Moisture content in percent by volume (x ) and con- ductivity in mS/m (y) were measured for 50 soil specimens. The means and standard deviations were x = 8.1, sx = 1.2, y = 30.4, sy = 1.9. The correlation between conductivity and moisture was comp..

User Account

All Pages