On the first day of class last semester, 10 sutdents were asked about the number of credit cards in their wallet. The resulting data were summarized in the following frequency table: Number of credit cards 0,1,2,3 Number of students 1,4,3,2 FInd the variance of the number of credit cards

if a fair six-sided die is rolled 1200 times, find the probability of getting more than 210 sixes. That an even number will occur at most 620 times

2. How many tissues should a package of tissues contain? Researchers have determined that a person uses an average of 62 tissues during a cold. Suppose a random sample of 2500 people yielded the following data on the number of tissues used during a cold: x = 57, s = 18. Determine if the mean...

A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance. 200 draws are made at random with replacement from the box: 2 4 6...

n cycle

Suppose that you wish to find P(-2 < x < 2) for a continuous uniform distribution having a minimum of -3 and a maximum of 3. If you incorrectly assume that the distribution is normal instead of uniform, will your answer be too big, too small, or will you still obtain the correct...

I need help with doing the whole test. I need rationales and explanations and solving if TI84 can be used. I have made a start at some of the questions. Thanks. cm 1.) Solve the problem. Suppose that you wish to find P(-2 < x < 2) for a continuous uniform distribution having a...

1.) Solve the problem. Suppose that you wish to find P(-2 < x < 2) for a continuous uniform distribution having a minimum of -3 and a maximum of 3. If you incorrectly assume that the distribution is normal instead of uniform, will your answer be too big, too small, or will you...

how many students assist SDSU college?

a medicine company produces pills containing an active ingredient. the company is concerned about the mean weight of this ingredient per pill, but it also requires that the variance be no more than 1.5. a random sample of 20 pills is selected, and the sample variance is found to be 2.05. how...