Assume that females have pulse rates that are normally distributed with a mean of μ=73.0 beats per minute and a standard deviation of σ=12.5 beats per minute. Complete parts​ (a) through​ (c) below.       Question content area bottom Part 1 a. If 1 adult female is randomly​ selected, find the probability that her pulse rate is between 67 beats per minute and 79 beats per minute.   The probability is 0.36880.3688. ​(Round to four decimal places as​ needed.) Part 2 b. If 25 adult females are randomly​ selected, find the probability that they have pulse rates with a mean between 67 beats per minute and 79 beats per minute.   The probability is 0.98360.9836. ​(Round to four decimal places as​ needed.) Part 3 c. Why can the normal distribution be used in part​ (b), even though the sample size does not exceed​ 30?     A. Since the distribution is of​ individuals, not sample​ means, the distribution is a normal distribution for any sample size.   B. Since the original population has a normal​ distribution, the distribution of sample means is a normal distribution for any sample size.   C. Since the distribution is of sample​ means, not​ individuals, the distribution is a normal distribution for any sample size.   D. Since the mean pulse rate exceeds​ 30, the distribution of sample means is a normal distribution for any sample size.

Find the standard deviation (rounded to the nearest unit) for the data indicated. Test Score              Frequency 90   1         80   4         70   8         60   5         50   3         40   2         30   1         0   4         Is there an easy way to get it?

Find the standard deviation (rounded to the nearest unit) for the data indicated.   Test Score              Frequency 90   1         80   4         70   7         60   6         50   3

A distribution of values is normal with a mean of 120 and a standard deviation of 4.Find the interval containing the middle-most 68% of scores: Enter your answer using interval notation. Example: (2.1,5.6)

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Use the following frequency distribution table to find the value of the mean score. Scores    Frequency1 - 3    54 - 6    17 - 9    3 Find the value of the standard deviation. Give your answer accurate to 1 place after the decimal point. σ =

A population has a mean μ = 70 and a standard deviation o=36. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 81. H=(Simplify your answer.) = (Simplify your answer.)

Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.

Students must have GPAs in the top 7.5% of the school to be accepted into the honour society. When the average GPA is 2.92 with the standard deviation of 0.29, what GPA do you have to have to be accepted? Show all your work. Round off to 100th.

Assume that blood pressure readings are normally distributed with μ= 124 and σ= 9. A researcher wishes to select people for a study but wants to exclude the top and bottom 9 percent. What would be the upper and lower readings to qualify people to participatein the study?