One of the main goals in statistics is to describe a distribution without examining each individual value. This description is done by depicting the distribution’s shape, center, and spread.  The following distribution is a random sample of Cincinnati State students’ heights (in inches) taken from the MAT 131 Student Survey: 59, 69, 63, 65, 70, 64, 65, 69, 63, 64, 63, 66, 67, 60, 64, 69, 60, 63, 66, 65, 59, 60, 70, 66 Here is the data set on StatCrunch. Describe the spread for this distribution.  Round to one decimal place.

An ABC News poll in April 2007 of a random sample of 1002 adults nationwide asked about various measures the government could take to try to reduce future global warming (www.pollingreport.com/enviro.htm). When asked whether the government should increase taxes on gasoline so people either drive less or buy cars that use less gas, 681 people said no. Test, at the 0.01 level of significance, the claim that the majority (more than 50%) of U.S. adults believe that the government should not increase taxes on gasoline to help reduce future global warming.State the null and alternative hypothesis for this situation, and the type of tail.

Using question 3, can you state that the minority (less than 50%) of students at Cincinnati State taking Statistics 1 are smokers? Explain.

Public Policy Polling (PPP), a reputable polling company, asked the following question in a previous Halloween-eccentric public opinion poll:“If zombies took over the world and human civilization collapsed, how long do you think you could survive: less than one week, less than one month, less than six months, less than one year, or more than a year?” Of the 1,200 likely voters who were asked this question, 324 said “Less than one week”. Construct a 99% confidence interval for the true population percentage of likely voters who said that they would survive a zombie apocalypse for less than one week. Round to three decimal places.

The New York Department of Health conducted an investigation on the effect of a new vitamin supplement given to pregnant women. The results in the following table show the mean, standard deviation, and standard error of the birth weights (in kilograms) of a random sample of 16 male babies whose mothers took the vitamin supplement when pregnant. n mean std. deviation std. error Weight 16 3.675 0.657 0.164

Public Policy Polling (PPP), a reputable polling company, asked the following question in a previous Halloween-eccentric public opinion poll:“If zombies took over the world and human civilization collapsed, how long do you think you could survive: less than one week, less than one month, less than six months, less than one year, or more than a year?” Of the 1,200 likely voters who were asked this question, 324 said “Less than one week”. What is the best point estimate for the true population percentage of likely voters who said that they would survive a zombie apocalypse for less than one week? Round to two decimal places.

Public Policy Polling (PPP), a reputable polling company, asked the following question in a previous Halloween-eccentric public opinion poll:“If zombies took over the world and human civilization collapsed, how long do you think you could survive: less than one week, less than one month, less than six months, less than one year, or more than a year?” Of the 1,200 likely voters who were asked this question, 324 said “Less than one week”.Do we know the true population percentage of likely voters who said that they would survive a zombie apocalypse for less than one week?

This following is the print out for the variable, DISTANCE_2, from the MAT 131 Student Survey.  This variable was the responses for the question, “What is the distance (in miles) from your home to the College?”. Assume that the sample is representative of all students taking Statistics 1 at Cincinnati State. 95% confidence interval results: Variable Sample Mean Std. Err. DF L. Limit U. Limit DISTANCE_2 13.872011 0.82889538 183 12.23659 15.507431 What is the point estimate for population mean? Round to two decimal places.

Would the standard error likely get larger or smaller if the sample size were increased? Explain.

It is believed that applying zinc to soil can affect the amount of herbage (leaves and stems) of plants grown. In an experiment, the regression line for predicting the amount of herbage (y) from the amount of zinc applied (x) is y-hat = 3.29 – 3.825x.  Which of the following can you conclude from this regression line?