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Scores on exam-2 are normally distributed with a mean of 66 and standard deviation 1.5
a) What is the probability that a student selected at random has a score below 60 on this exam?
b) Find 'a' such that P(x>a)=.7357
given the significance level 0.05 the f-value for the degrees of freedom df 37 is a. 6.16. b. 4.12. c. 4.35. d.
the author recorded actual temperatures along with temperatures that were predicted 5 days earlier. results are listed
These data were collected using a telephone interview with pet owners in Mishawaka, Indiana. The animal shelter was run by the Humane Society of Saint Joseph County. The control group data were obtained by a random digit dialing telephone survey. ..
You give a standardized statistics exam for which the scores are normally distributed with a mean score of 750 and a standard deviation of 100.
administrators at a university will charge students 158 to attend a seminar. it costs 2160 to reserve a room
A financial institution transfers a large data faile every evening from offices around the world to its San Antonio headquarters. Once the file is received, it must be cleaned and partitioned before being stored in the company's data warehouse.
a survey provided the estimate that the mean number of hours of television viewing per household is 7.25 hours per day.
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
The probability of getting a promotion and a raise is 0.25. What is the probability of getting a raise.
1a. the mean weight of 120 7th graders is 75 lbs with a standard deviation of 6 lbs. calculate the standard error of
the data shown in table are chemical process yield readings on successive days read down then across. construct a
based on the certain data a null hypothesis is rejected at the 0.05 level of significance. would it also be rejected at
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