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In a survey of 1000 high school students in Oregon, the average SAT score for 500 students who chose to go out of state for college (Group 1) was 1225 and the average SAT score for 500 students who chose to stay in state for college (Group 2) was 1130. The population standard deviation for students who choose to go out of state is 95 and the population standard deviation for students who choose to stay in state is 103. Find a 95% confidence interval and decide if the SAT scores between the two groups is significantly different. Confidence Interval (round to 4 decimal places):
Find the population proportion, as well as the mean and standard deviation of the sampling distribution for samples of size n=60.
The bombers success rates for bomber A, B and C are: 30%, 45% and 60% respectively. Find the probability that:Bomber A will succeed, but bomber B and C will fail.
a. Statistics is a numerical fact. b. Descriptive statistics analyzes a specific group. c. Decisions made on the basis of scientific methods are pure guesses.
The experimental Oblique Wing Aircraft (OWA) has a wing that pivots, as shown in Figure P8.17. The wing is in the normal unskewed position for low speeds and can move to a skewed position for improved supersonic flight [11]. The aircraft control s..
Suppose random samples of 40 employees are selected. What would the distribution of average ages from samples of this size look like? Why?
Formulate a research hypothesis to test one population parameter and another to test two (or more) population parameters.
Table shows the distribution of household income in 1999-2002 for three geographical areas in the UK. Using diagrams compare these distributions.
(a) Does a singlefactor ANOVA show a significant difference among varieties?
1.a researcher is interested in comparing sat scores for students enrolled in public schools private schools and those
q1. with random sampling there is homogeneity within a subgroup or stratum.a. judgmental b. simple c. clusterd.
the number of books checked out at a public library by a sample of eight primary school children were recorded6 4 5 7 5
To explore correlations between reward systems and team work attributes in the Saudi Arabian bank sector, To explore relationships between reward systems and team work effectiveness in the Saudi Arabian banking sector
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