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Rolling the dice : An exeriment was conducted in which two fair dice was thrown 100 times. The sum of the pips showing on the dice was than recorded. the following frequency histogram gives the results.
a) What was the frequency outcome of the experiment?
B) What was the least frequency?
C) How many times did we observe a 7?
E) Determine the % of time 7 was observed.
F) Describe the shape of the distribution.
in a suburban area past records revealed that 50 percent of all the high school graduates go to college. from 20
1. a sample survey of 54 discount brokers showed that the mean price charged for a trade of 100 shares at 50 per share
Can you provide another explanation for this one: Zc/Tc for 86% confidence interval when the sample size 50?
Find the probability that the mp3 is defective. If the mp3 is defective what is the probability it came from Factory I? If the mp3 player is no defective, what is the probability that it came from factory II?
The annual commissions per salesperson employed by a retailer of mobile communication devices averaged $40,000, with a standard deviation of $5,000. What percent of the salespersons earn between $32,000 and $42,000?
Why might normality be an issue here? (c) What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence? (d) If this is not a reasonable requirement, suggest one that is.
Suppose the Doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter.
for a hypothesis comparing two population means what is the critical value for a one-tailed hypothesis test using a 5
Constructing a scatter plot and determining correlation. a. display the data in a scatter plot, b. calculate the correlation coefficient f, and c. make a conclusion about the type of correlation.
Suppose that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume the variable is normally distributed.
you are rolling a 6-sided die but you dont know whether its fair or not. you know that that are only two kinds of dice
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