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Q1. In a city in Italy, 30% of the families have a MasterCard, 20% have an American Express card, and 25% have a Visa card. Eight percent of families have both a MasterCard and an American Express card. Twelve percent have both a Visa Card and a MasterCard. Six percent have both an American Express card and a Visa card.
a. What is the probability of selecting a family that has either a Visa card or an American Express card?b. If a family has a MasterCard, what is the probability that it has a Visa card?c. If a family has a Visa card, what is the probability it has a MasterCard?Q2. A National study has determined that people who work full time average 43.4 hours worked per week.
Assume that the number of hours worked per week for those who work full time is normally distributed. Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for those workers?
Specific part of which 10 are defective and 90 are non defective. three parts are selected without replacement. construct a tree diagram representing the sample space.
State the alternate hypothesis for this study? What critical value should be used to determine the rejection region? Use the 1 proportion Z-test.
How should she proceed? What additional data (if any) is needed? Which statistical analysis technique should be used? Can an analysis be performed? Why or why not?
Based on the boxplots in part (a), which of the two groups, students or teachers, tends to have watch times that are closer to the true time? explain you choice.
A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are normally distributed, with mean equal to the true weight of the specimen.
Think about a real world situation or problem that could be addressed using a single-sample t test. For this situation or problem, clearly identify the independent and dependent variables you would study
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
Almost 20% of the stratum was sampled compared to the second stratum where only 2% of the stratum was sampled. Will this phenomenon introduce bias into the above estimates?
question for patients with a particular disease the population proportion of those successfully treated with a standard
question team sports inc. sells sporting goods to high schools and colleges via a nationally distributed catalogue.
Find the critical value having an area of 0.95 to its right for an F-curve with 8 numerator degrees of freedom and 15 denominator degrees of freedom.
if the distribution of the measure of a random variable is not a normal distribution what implications might that fact
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