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The Appliance Center has six sales representatives at their North Jacksonville outlet. Listed below is the number of refrigerators sold by each last month.
Sales Representative Number Sold
Zina Craft 54
Woon Junge 50
Ernie DeBrul 52
Jan Niles 48
Molly Camp 50
Rachel Myak 52
a. How many samples of size two are possible?
b. Select all possible samples of size two and compute the mean number sold.
c. Organize the sample means into a frequency distribution.
d. What is the mean of the population? What is the mean of the sample means?
e. What is the shape of the population distribution?
f. What is the shape of the distribution of the sample mean?
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
A confidence interval increases in width as:
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
To maximize Andre's probability of landing on the net, how far away from the cannon should he position the nearest edge of the net?
Test whether there is difference in the two population mean. Use p-value approach
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
Use the permutations rule to determine the total number of different ways the winners can be drawn.
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
Create a histogram over five class intervals.
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