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Public health officials claim that people living in low income neighborhoods have different Physical Activity Levels (PAL) than the general population. This is based on knowledge that in the U.S., the mean PAL is 1.62 and the standard deviation is 0.5. A study took a random sample of 48 people who lived in low income neighborhoods and found their mean PAL to be 1.55. Using a one-sample z test, what is the z-score for this data? (Answer to 2 decimal places)
What is the critical value of z in the previous question? Report the critical value CLOSEST to your calculated z-score. (Answer to 2 decimal places.)
Calculate the t test statistic. Can you reject ρ = 0? (e) Use Excel's function =TDIST(t,deg_freedom,tails) to calculate the two-tail p-value.
A sample of 100 orders revealed that 82 were delivered within the promised time. At the .10 significance level, can we conclude that less than 90 percent of the orders are delivered in less than 10 minutes?
A mean of 200 and a standard deviation of 20. Determine the number of boxes,x, where 80% of the number of boxes received is less than x.
Based on its position in the periodic table of the elements, which pure element would also react violently with oxygen and water?
q1. the police chief in montgomery wants to know if the citys population feels that the police are doing a good job. in
Develop an estimated regression equation using handling, dependability, and fit & finish to predict overall quality. Is the estimated regression equation significant? Why?
A pizza store chain wants to see which pizza toppings customers seem t olike the best. A random sample of people were asked about their pizza preferences.
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
develop an estimated regression equation that can be used to predict the buy again rating given based on the steering
Find the probability that fewer than 5 are satisfied with the airlines. (c) Find the probability that 8 or more are satisfied with the airlines.
The following data show levels of fertilizer use (lbs) and wheat yield (bushels) on repeated trials on a six acre plot.
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
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