The length of an elephant’s trunk is normally distributed with a mean of 175 cm and a standard deviation of 10 cm. Use StatCrunch to find the length that separates the lowest 12% of trunk lengths. Round to the nearest centimeter.

Listed below are the percentage of students graduating within four years from 36 randomly selected high schools in the nation. The results were: 62, 63, 67, 68, 68, 71, 72, 72, 74, 75, 77, 77, 78, 78, 78, 78, 80, 82, 82, 82, 82, 83, 84, 84, 85, 86, 87, 87, 87, 87, 87, 88, 88, 88, 88, 88.  a.)  You will make a frequency table with 6 classes.  Use the Honorlock calculator to find the class width.           b.)  Form a frequency table with 6 classes.     Class Limits    Frequency     –         –         –         –         –         –     c.)  What is the distribution shape:  skewed left, skewed right, bell shaped, or uniform?          

There are 8 members of a club. You must select a president, vice president, secretary, and a treasurer. Use StatCrunch to find how many ways can you select the officers.

If 5 players out of 11 are selected to be on a basketball team, Use StatCrunch to find how many different teams can be formed?

Vegetarian and plant-based options are becoming more widely available in restaurants and grocery stores. A survey is conducted to determine the percentage of adults in the United States who declared themselves to be vegetarian. The 95% confidence interval for the percentage of adults who declared vegetarian is (0.068, 0.129). Complete parts a and b. a. Interpret the meaning of this confidence interval using a complete sentence.   b. Use StatCrunch to find the sample size required to estimate the percentage of adults in U.S. who declare themselves to be vegetarian: assume no prior studies were made and we need to be within an error of 3%?

There is always a need for people to donate blood. College students often volunteer when there are blood drives on campus. A survey is conducted to determine the percentage of students who have a negative blood type (O-, A-, B- or AB-) as they exit the bloodmobile. The 95% confidence interval for the percentage of students who reported a negative blood type is (12.4%, 17.7%). Complete parts a and b. a.) Interpret the meaning of this confidence interval using a complete sentence.   b.) Use StatCrunch to find the sample size required to estimate the percentage of students who reported a negative blood type.  Assume no prior studies were made and we need to be within an error of 3%. 

Scores on the Critical Reading part of SAT exam in recent year were roughly normal with mean of 495 and standard deviation of 118. Use StatCrunch to find the probability that the average score for 30 students exceeds 475.

Based on our virtual class dicussion on sustainable agriculture, agricultural seed banks are important for ________.

June is National Dairy Month, and in honor of that, let’s examine the distribution of a cow’s milk production.  Milk production follows a normal distribution with a mean of 6 gallons and a standard deviation of 1.3 gallons per day.  3 pts. a) What amount of milk would a cow need to produce to be in the top 0.5% that makes the most?   Now let’s examine the sampling distribution of the average amount of milk produced by a group of cows each day. 2 pts. b) Do we need the Central Limit Theorem to assume normality of the average milk production?  Explain. 4 pts. c) Find the probability that 10 cows produce more than an average of 5.75 gallons of milk per day.

Use this Hertzsprung-Russell diagram to determine the classification of Antares, which has an absolute magnitude of −5 and a surface temperature of 3,200°C. Which type of star is it?