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A researcher wants to see if gender plays a role in whether a college student smokes. An analysis of survey data yields the following contingency table, chi-squared value, and p-value. Tabulated statistics: Gender, Smoke Cigarettes Rows: Gender Columns: Smoke Cigarettes No Yes All Female 119 7 126 Male 89 10 99 All 208 17 225 Cell Contents: Count Pearson Chi-Square = 1.640, DF = 1, P-Value = 0.200 a. What is the risk of smoking for Female students? b. What is the risk of smoking for Male students? c. What is the relative risk of males to females? d. What is the increased risk of males over females?
Solve the equation x^2 + 8x - 2 = 0 using both-Write one paragraph describing which method you prefer and why.
A confidence interval estimate for the population mean is given to be (41.16, 49.85). If the standard deviation is 16.290 and the sample size is 54, answer each of the following (show all work):
The borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Give an example of using the distributive property for a negative monomial times a trinomial with different signs on the terms [for example: -3x(2xy + 3y - 2x)] and show each step of the distribution.
Use x for the number of bats and y for the number of balls made per week. The number of work-hours avaiable for construction and finishing is fixed.
Can the binomial distribution be used to model the number of rare events that occur over a given time period?
Critically discuss the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.
A purchasing agent for a national chain of seafood restaurants wants to estimate the mean weight of shrimp in a large catch. How many shrimp should be sampled from the catch to be 95% confident that the sample mean will be off from the actual mean we..
Use the 5% level of significance. (a) Define null and alternate hypotheses. (b) Determine the value of sample test statistic? (c) Determine(or estimate) P-value.
Of 970 subjects, 20 answered yes and 950 answered no. find p^, the proportion of the sample who were victims. Find the standard error of this estimate.
A locksmith is preparing an electronic key code of 3 integers selected from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} without replacement. Calculate the probability that at least one of integer in the code is 5.
A thermometer is randomly chosen and tested at 0 degrees C. What is the probability of a reading of less than -2.75 degrees C?
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