A local convenience store in a large city closes each day at 10 P.M. The owner of the store is investigating whether mean sales will increase by at least $10 per day if the store remains open until 11 P.M. The owner asked the 41 members of a local civic group to estimate the amount of money they might spend during the extra hour. The sample mean was $11.50. The owner will conduct a one-sample tt-test for a population mean. Have the conditions for inference been met? A)nYes, all conditions have been met. B) No, the sample was not chosen using a random method. C) No, the sample size is greater than 10 percent of the population. D) No, the sample size is not large enough to assume normality of the sampling distribution. E) No, the distribution of the sample is not normal.

A sandwich shop claims to sell subsandwiches that are 12 inches lona. An employee is alittle suspicious about this claim So over the course of the next week, he measures 45sandwiches at random. The mean and standard deviation for the 45 sandwiches is 12 18 inches

The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances that someone is earning more than $20 an hour?

What is the name of the test used?

The mean purchase total is $93.80 and the median purchase total is $75.80. The store manager investigates and learns that the customer that made a $500 purchase had not purchased groceries, but rather a $500 gift card. Because this customer's purchase was not typical, the manager decides to exclude this total from the data set. How will removing the $500 purchase from the data set affect the value of the mean and the median?

The mean annual wage per employee for each state and the District of Columbia for the year 2009 is $42,961 and the standard deviation is $7,884.75. The mean and standard deviation for Kentucky is $37,996 and $6,280.67. Using the data for all states including D.C., would a wage of $85,000 be unusual? Source: U.S. Bureau of Labor Statistics

The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Compute a 5% trimmed mean for Upper Canyon and Lower Canyon. Round your answer to the nearest thousandth. Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch 2 3 1 1 3 4 6 9 3 1 3 Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls 8 1 1 0 6 7 2 11 3 0 1 10 2 1 The 5% trimmed mean for Lower Canyon is 2.889 and for Upper Canyon is 3.500. The 5% trimmed mean for Lower Canyon is 2.364 and for Upper Canyon is 3.071. The 5% trimmed mean for Lower Canyon is 3.500 and for Upper Canyon is 2.889. The 5% trimmed mean for Lower Canyon is 3.000 and for Upper Canyon…

Suppose you made 5 measures of your walking stride and got the following values: 0.81 m,  0.87 m, 0.79 m, 0.84 m, and 0.83 m What is the Standard Deviation (in meters) of this sample? You may either do this by hand or use your favorite math tool.

If you wanted to determine whether mean levels of blood glucose were different according to gender and age a one-way ANOVA would be an appropriate test to perform.  True  False

According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches.  If Zsike is 67 inches tall, what is her z-score?