A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Carpeted: 15...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Carpeted: 15...
100 people in New York and 100 people from Chicago, were each asked "do you like your own cities style of pizza better than the other one?" The number of people that said yes in new...
Q1 A liquid phase reaction: A → 2R was performed in two different reactors and the following results were obtained in repeated experiments: Reactor 1: Conversion of A (in %): 57.2, 53...
For their class project, a group of statistics students decide to survey the student body to assess opinions about the proposed new student center. Their sample of 200 contained 50 first-year students,...
A researcher is interested in increasing feelings of self-confidence in adolescents. He randomly selects 100 adolescents from the population and randomly assigns 50 individuals to a treatment program...
A population is normally distributed with μ = 50, σ = 8, N = 52. Answer the following questions based on this information. (show all work) a. The mean of the distribution of means is ______...
Choose one of the following: A) 15 B) 14 C) 4 D) 3
Choose one of the following: A) the less likely an observed difference is due to chance B) the more likely an observed difference is due to chance C) the larger the sum of squares...
What percent of the eruptions last longer than 2.3 minutes?
The mean test score was 850 with a standard deviation of 100. What porportion of students had a higher score than Vivian? (Assume that test scores are normally distributed.)
How would I go about answering these questions? Also, how do you differentiate between solving them as a dependent or an independent event? Let P(A) = .3, P(B) = .4 and P( A ∪ B...
With a distribution of 10 scores, nine of them are 3, 5, 9, 1, 9, 2, 0, 3, and 9. The last one is greater than 5 but it is not 9. Is it possible to determine the mean of the distribution?
a magazine article reports that, for the year 2011 insurance claims for jewelry exceeded those for electronics. The insurance covers lost, damaged, or stolen items. Identify a statistical population...
successful 75% of the time. If the results of 9 such surgeries are randomly sampled, what is the probability that more than 7 of them are successful?
an example of educational research studies that used a .01 significance level and why?
A. Yes, because each item has an equal chance of being selected. B. Yes, because each group of n items has an equal chance...
5. For the data presented below, answer the questions that follow. scores= individual Politictical test Current event 1 ...
A weight loss center provided a loss for 72% of its participants. The center’s leader decides to test a new weight loss strategy on a random sample size of 140 and found weight loss in 78% of...
1: p-value is the probability of obtaining a sample result at least as extreme as that which was observed, assuming the null hypothesis is true. 2:An experiment is necessary to establish a cause-and-effect...
You are studying what proportion of SU students smoke. The null hypothesis is p = 0.27, and the alternative hypothesis is p > 0.27. Your study obtains a p-value of 0.001. ...