7)A certain group of test subjects had pulse rates with a mean of 79.7 beats per

Question

7)A certain group of test subjects had pulse rates with a mean of 79.7 beats per minute and a standard deviation of 10.1 beats per minute. Would it be unusual for one of the test subjects to have a pulse rate of 145.3


Minimum "usual" value beats per minute___________
(Type an integer or a decimal.)

Maximum "usual" value beats per minute____________
(Type an integer or a decimal.)

Is 79.9 beats per minute an unusual pulse rate

A.No, because it is smaller than the minimum "usual" value.
B.Yes, because it is between the minimum and maximum "usual" values.
C.Yes comma because it is larger than the maximum "usual" value.
D.No, because it is larger than the maximum "usual" value.
E.No comma because it is between the minimum and maximum "usual" values.
F.Yes comma because it is smaller than the minimum "usual" value.

(Please answer both questions all parts)

Save Homework: Section 3-3 HW 9 of 10 (10 complete Assigned Media EQuestion Hel Find the standard deviation, S, of sample data summarized in the frequency distribution table given below by using the formula below. Where represents the class midpoint, frepresents the class frequency, and n represents the total number of sample values. Also, compare the computed standard deviation to the standard deviation obtained fromthe original list of data values, 9.0. n(n 1) 30.39 4049 50.59 60.69 nterval 20-29 70-79 Fre quency Standard deviation ound to one decimal place as needed.) Part B Consider a difference of 20% between two values of a standard deviation to be significant. How does this computed value compare with the given standard deviation, 9.0? A The computed value is significantly greater than the given value. B.The computed value is significantly less than the given value. The computed value is not significantly different from the given value. Enter your answer in the answer box and then click Check Answer. 1 Part Clear Al Check Answer javascript: doExercise 110 653 PM a OneDrive Desktop A F Search the web and Windows

Explanation / Answer

7)

According to statistics, when Normal distribution data

1.68.2% of the data fall within 1SD of the mean

2. 95.2% of the data fall within 2SD of the mean

3.99.7% of the data fall within 3 SDof the mean

Usually 2.5 or 3 Sd of mean would consider

.thus (-2* , +2*) = (79.7-2*10.1 , 79.7+2*10.1) =(59.5 ,99.6)

          (-3* , +3* = (79.7-3*10.1 , 79.7+3*10.1) =(49.4, 110)

Minimum “usual” beats perminutes =49.4

Is 79.9 beats per minute an unusual pulse rate

option E

E.No , because it is between the minimum and maximum "usual" values.

standard deviation =SQRT(n.(fx2) –[fx]2) /(n(n-1)

   = sqrt(95*987599.25) –(4277.5)2 /95*94

=91.964

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