for the past 20 years high temp on april 15 has an average of u=60 with standard deviation of o=4 last year the high temp was 75 degrees based on info last years temp was april 15? was it a little below, above. not enough info or above average or impossible to describe?
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for the past 20 years high temp on april 15 has an average of u=60 with standard deviation of o=4 last year the high temp was 75 degrees based on info last years temp was april 15? was it a little below, above. not enough info or above average or impossible to describe?
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- The average of the final exam grades of a course attended by four hundred students is calculated as 60 points and the standard deviation as 15 points. A letter grade will be given to those who score 80 and above in the exam. What is the rate of 0 and above and how many people can be estimated to get A?Suppose you know that the amount of time it takes your friend Susan to get from her residence to class averages 5050 minutes, with a standard deviation of 55 minutes. What proportion of Susan's trips to class would take more than 5050 minutes? You should not need to use the applet to know this value. Enter your answers accurate to two decimal places.A researcher named liza wants to estimate the mean age of pilots in an airline company. The population standard deviation from the previous study is 6.30 years. How many pilots must be selected if he wants to be 95% confident that the entire length of the interval must be 3.2 years?
- The average age of senators in the 108th Congress was 58 years. If the standard deviation was 11 years, find the z scores corresponding to the oldest and youngest senators of age 87 and 36 . Round z scores to two decimal places The z-score corresponding to the oldest senator of age 87 is ?The average number of Hate Crimes in the United States per year (1991 to 2018) is approximately 7900 per year with a standard deviation of approximately 1200 hate crimes per year.In what range would you expect to find the middle 95% of hate crimes per year?Between and .If you were to draw a sample of 10 years worth of hate crimes, in what range would you expect to find the middle 95% of average number of Hate Crimes per year in this sample?Between and .Your answers should be accurate to at least 2 decimal places.The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117 and standard deviation of 15 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher. d. What two values divide this normal curve into a middle 97%, in other words, what two values represent the middle 97% of blood pressures? Put the lower number FIRST! and mmHg e. How many standard deviations away would a blood pressure of 140 be? f. Would this be considered unusual? Not Unusual Very Unusual Somewhat Unusual