A video game company sells an average of 132 games a month per store, with a standard deviation of 9 games. The company is looking to reward stores that are selling in the top 7%. How many video games must a store sell in order to be eligible for a reward if the company is only looking at 36 of their stores.

There are only 4 teams in a league. The winning percentages of the teams are given as follows: Team A: 58%, Team B: 30%, Team C: 62% and Team D: 82%. Calculate the standard deviation.

A list of the top twenty restaurants in Chicago was released. Four of the restaurants specialize in seafood. If five of the restaurants are selected randomly from the list, the standard deviation for the number of restaurants specializing in seafood is (round r to 4 decimal places).

A magazine recently published an article that stated the population mean amount young adults from a certain city spend per week on food is exactly $150. Eric, a college student who resides in the city, believes that the population mean is greater than $150 per week. He selects a representative sample of 110 young adults and finds out how much each person spends on food per week. He calculates the sample mean to be $156.45 with a sample standard deviation of $26.62. The test statistic ț for a hypothesis test of Ho : μ = 150 versus Ha : μ 〉 150 ist 2.54. If 0.005 〈p-valueく0.01 and the level of significance is α = 0.10, which of the following statements are accurate for this hypothesis test to evaluate the claim that the true population mean amount young adults from the city spend per week on food is greater than $150? Select all that apply: Fail to reject the null hypothesis that the true population mean amount young adults from the city spend per week on food is equal to $150 Reject the…

A test consists of 980 true or false questions. If the student guesses on each question, what is thestandard deviation of the number of correct answers?

Two friends, Karen and Jodi, work different shifts for the same ambulance service. They wonder if the different shifts average different numbers of calls. Looking at past records, Karen determines from a random sample of 40 shifts that she had a mean of 4.8 calls per shift. She knows that the population standard deviation for her shift is 1.4 calls. Jodi calculates from a random sample of 31 shifts that her mean was 5.6 calls per shift. She knows that the population standard deviation for her shift is 1.2 calls. Test the claim that there is a difference between the mean numbers of calls for the two shifts at the 0.05 level of significance. Let Karen's shifts be Population 1 and let Jodi's shifts be Population 2.   Step 2 of 3 :   Compute the value of the test statistic. Round your answer to two decimal places.

A researcher collects data from 30 different individuals and wants to understand the correlation between income and education. The degrees of freedom for the analysis would be?

A professor using an open-source introductory statistics book predicts that 60% of the students will purchase a hard copy of the book, 25% will print it out from the web, and 15% will read it online. She has 200 students this semester. Assuming that the professor's predictions were correct, calculate the expected number of students who read the book online.

Two friends, Karen and Jodi, work different shifts for the same ambulance service. They wonder if the different shifts average different numbers of calls. Looking at past records, Karen determines from a random sample of 41 shifts that she had a mean of 5.1 calls per shift. She knows that the population standard deviation for her shift is 1.5 calls. Jodi calculates from a random sample of 32 shifts that her mean was 5.8 calls per shift. She knows that the population standard deviation for her shift is 1.2 calls. Test the claim that there is a difference between the mean numbers of calls for the two shifts at the 0.01 level of significance. Let Karen's shifts be Population 1 and let Jodi's shifts be Population 2.   Step 2 of 3 :   Compute the value of the test statistic. Round your answer to two decimal places.

Here are 6 celebrities with some of the highest net worths (in millions of dollars) in a recent year: George Lucas (5500), Steven Spielberg (3700), Oprah Winfrey (3200), Michael Jordan (1700), Paul McCartney (1200), and Jerry Seinfeld (950). Find the range, variance, and standard deviation for the sample data. What do the results tell us about the population of all celebrities? Based on the nature of the amounts, what can be inferred about their precision? The range is $ 4550 million. (Round to the nearest integer as needed.) The variance is million dollars squared. (Round to the nearest integer as needed.)