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Question: A high school counselor wants to examine whether the teenage pregnancy rate at her school is different from the rate nationwide. She knows that the rate nationwide is 15 %.
She randomly selects 80 female students from her high school. She finds that 9 out of 80 students are either pregnant now or have been pregnant previously. a. What statistical test should be used to
Read the Hamilton County Judges case study and please provide a Managerial Report that includes the following:
Write down the null and alternative hypotheses to examine this question using ANOVA.
Use Minitab to construct a 95% Confidence Interval for the difference between the means of your numeric variable for the different levels of your 2-level categorical variable.
Is there a significant difference in teacher's salaries between two states? Use a = 0.02. Find the 98% confidence interval for the difference of the two means.
A sample of 40 mid-cap growth funds provides a mean return of 3.4%. Assume the population standard deviation for mid-cap growth funds is known from previous studies to be s 2%. Use the sample re
Conduct a hypothesis test to determine if the proportion of business students atBayview University who were involved in some form of cheating is less than thatof non business students at other insti
Construct a point estimate of the proportion of items returned for the population of sales transactions at the Houston store.
Since 2000, the Toyota Camry, Honda Accord, and Ford Taurus have been the three best selling passenger cars in the United States. Sales data for 2003 indicated market sharesamong the top three as fo
Assume the branch manager requested estimates of the mean selling price of Gulf View condominiums with a margin of error of $40,000 and the mean selling price of No Gulf View condominiums with a mar
When the data have the properties of ordinal data and the interval between observations is expressed in terms of a fixed unit of measure, the variable has which scale of measurement?
The company then wants to get a general idea of what the results would be in the larger population, but while it will look at significance indicators, it is not heavily interested in significance, b
The researcher wants to see if the time spent gaming can predict the time needed to perfect laparoscopic skills. What would be the correct test to apply?
We will want to know if there is a significant difference in the times for each interface. What is the appropriate test?
A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many se
The test is administered to all students, and the test results for the study subjects are placed in SPSS. We want to know if there is a statistical difference between these time periods. What test i
If a study had a result of F (2, 147)= 4.56, p = 0.003, how many groups were in the study, and what was the sample size?
Write appropriate non-directional null and alternative hypotheses in words and symbols.
Use methods of descriptive statistics to summarize the data. Comment on the findings.
a) Determine the mean production of acorn in the last six years. b) Calculate the standard deviation of data relative to acorn production.
Identify the space of results of an observation of 2 consecutive minutes.
Let Ω be a space of results and B one happening such that probability of B > 0 (P(B) > 0). Prove that for any happening A, we have:
In the Poker game, a hand is a set of 5 cards chosen randomly from a usual deck of 52 cards.
How many straight flush possible hands exist in Poker? (5 cards of 5 consecutive ranks, all in 1 suit, including Aces, Kings, Queens and Jacks). Explain.