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# Statistics

# chi-square

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# Anova

. A researcher exposes participants to an online, face-to-face, or hybrid class, and then measures their knowledge via a post-test. The researcher believes that post-test scores for those in the face-to-face class will be higher than those in the online or hybrid class. A. What are the variables in this specific study? Identify each as […]

# Correlation & Regression

A. A researcher wants to look at the relationship between pre-test scores and post-test scores. If the relationship is significant, the researcher would like to predict post-test scores from pre-test scores. A. What are the variables in this specific study? Identify each as an independent or dependent variable. The variables in study two would be the […]

# The independent variable,dependent variable,hypothesis.

1. A researcher wants to look at the effect of time on test scores, believing test scores will change over the semester from the pre-test to the post-test. What are the variables in this specific study? Identify each as an independent or dependent variable. The independent variable and dependent variable is the same in dependent […]

# Grilled cheese sandwich.

Grilled cheese. You need to make five grilled cheese sandwiches. You have a grill that is large enough to toast two sandwiches at a time. The sandwiches must be toasted one minute on each side. It takes 3 seconds to flip a sandwich and 5 seconds to take one off or put one on the […]

# party arrangement for couples

1.A dating service has as clients 6 recently divorced couples. Each client wants the opportunity to socialize with the other clients of the opposite sex, but refuses to be in the same room as his or her ex-spouse. The service wants to throw a sequence of parties to bring people together. They want each male […]

# t-test.Hypothesis

1. As you increase the number of subjects in your sample, the calculated value of a t-test will . a) increase b) decrease c) remain the same 2. As you decrease the true distance between the null and alternative hypotheses (Jll- Jlo), the likelihood of rejecting the null hypothesis a) increases b) decreases c) remains […]

# Probability. CPI

1. The probability that any marriage will end in divorce is 0.52 and the independent of this, the probability that any marriage will result in a birth of a child is 0.80. What is the probability when someone gets married that they will end up divorced and have children? a) (0.52) + (0.80) = 1.32 […]

# Sample Proportion in statistics

Question 1 A port CEO wants to study the proportion of ships arriving at his port on time. How many ships must be included in the sample if the CEO wants the error to be within 0.02 and a confidence level of 95% if: a there is no information available that could be used as […]