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Using a 5% significance level, test the claim that there is a gender difference:
Among 2200 randomly selected males, 72% wear seat belts.Among 2380 randomly selected females 84% wear seat belts.
Write the null and alternative hypothesis, find the test stastic and critical values, the p-value.
Surface area of a cube. The formula A = 6V^-2/3(-2/3 power) gives the surface area of a cube in the volume V. What is the volume of a cube with a surface area 12 square feet?
Doing A/B testing on an ecommerce web site. I have been working on rule of thumb of 500 vistors through each page or 50 conversions on one of the page before ending the test and deciding which is the best page
At the 0.05 significance level, is there a difference in the proportion of viewers watching the three channels? State the null and alternative hypothesis. Identify the level of significance: Given at 0.05
Normally distributed about a mean value of 580 with a standard deviation of 60. Determine what percentage of the students scored higher than 750 on the exam.
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
What is the p-value associated with the sample results? What is your conclusion based on the p- value?
A cereal manufacturer wants to determine if the filling machine is operating to specifications. The machine is specified to fill to a 12oz level.
Each home was 24 and the standard deviation of the sample was 5 people. Develop a 98 percent confidence interval for the population mean.
Let X be a random variable which is distributed normal with mean 200, but you don't know the standard deviation. Do pairwise comparisons (greater than, equal to, less than or can't say) for the following four quantities:
To find out the efficiency of the current ticket operation, Mike wishes to examine several queue operating features.
in the game of ludo a player has to throw one die and move a selected token based on the number shown on the die. if a
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