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In a busy coffee shop, which is a member of an international chain of coffee shops, 40% of customers order a pastry in addition to their drink. If 20 customers were selected at random during one business day, what is the probability that at least 11 of them did not order a pastry with their drink.
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity).
Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.
In terms of p , the researcher should test which of the following null and alternative hypotheses?
Choose a variable and collect data for a least three different groups(samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following:
Mean of $32,000 and a standad deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
Joe thinks that no more than 20% of students in his Statistics class will get an A in the final examination. To prove his claim, he takes a random sample of 35 students and finds to his surprise that 30% of students got an A.
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
Suppose a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
Q2 is dummy variable equal to 1 in second quarter and 0 otherwise; and Q3 is final dummy variable equal to 1 in third quarter and 0 otherwise. Determine the Base Quarter?
Suppose that a group of 48 students who took the SAT was chosen. If you wanted to calculate a probability for the average SAT score for these 48 students, what is the standard error.
The various measures of central tendency: compare them (how they are similar) and contrast them (how they are different), including specific references to numbers, pictures, and tables derived from the data set.
A cereal manufacturer seeks to test their newest product against a competitor's. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the technicians serving t..
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