Answer:
Option A - 0.9938
Step-by-step explanation:
Given : Assume that blood pressure readings are normally distributed with a mean of 118 and a standard deviation of 6.4. If 64 people are randomly selected.
To find : The probability that their mean blood pressure will be less than 120?
Solution :
The formula to find the probability is
Where, X is the sample mean
is the population mean
is the standard deviation
n=64 is the number of sample
The probability that their mean blood pressure will be less than 120 is given by,
From the z-table the value of z at 2.5 is
Therefore, Option A is correct.
The probability that their mean blood pressure will be less than 120 is 0.9938.
Answer:
17.1≤x≤23.1
Step-by-step explanation:
The formula for calculating the confidence interval is expressed as;
CI = x ± z*s/√n
x is the mean yield = 20.1
z is the 80% z-score = 1.282
s is the standard deviation = 7.66
n is the sample size = 11
Substitute
CI = 20.1 ± 1.282*7.66/√11
CI = 20.1 ± 1.282*7.66/3.3166
CI = 20.1 ± 1.282*2.3095
CI = 20.1 ±2.9609
CI = (20.1-2.9609, 20.1+2.9609)
CI = (17.139, 23.0609)
hence the required confidence interval to 1dp is 17.1≤x≤23.1
Two<span> trains </span>leave different<span> cities heading toward each </span>other<span> at </span>different<span> speeds. ... At the </span>same time<span>Train B, </span>traveling 60 mph<span>, leaves Eastford heading toward Westford. ... Since an equation remains true as </span>long<span> as we perform the </span>same<span> operation ... that the train's rate is 40 </span>mph<span>, which means it </span>will travel<span> 40 </span>miles<span> in </span>one<span> hour.</span>
Answer:
wdd
Step-by-step explanation:
ddddddddddddddddddddddddddddddddddddddddddffffffffdfdfdfddfdfddfddddddddfuhkjhfhkjghhgkkjfkdghdhfjhgdjhdjfkhkdjfgkdfhghfhgkkfgkfhkjhjhgjhfjgkfgkhkfhgkkfhgkgkjhgjdfhgjdhfgkjdhgjhdgkjdfhkjhdkjfhgjhdjhjfkjhfhhkfdhkhgkdfhkdhfkhdfkggshlfgdshldfhshdfhkhghdklfhfdkhkhgkfdhkjhkhgskhkdfhgkhfdkgkdgklkdsghhlhdsghfghksfdlhhljkghkjhfkjhgksfdhklsdgldskghkljshgkjhfkjghdkhjkghdfkshgkfdkhgfdhkgljgljgjgjgjkjgjdjgldjgklgjglgdsjlfdjgdslkjdfkjgldsjfkjdfjfdklkjgkjgkljdsjgjgijgirjiyignlkdsfmgljijsidfjgijirgjijijdgjkjsdkjgiuiujirgtiuihrtiy984u98u55u9u5u5hyurjyj5yu98u5y95u9893939t98985959598984598u9845uy85uy99iuyjierjpsijsrgijiinbnibinghghhdhsihfigijriusgihhkgshirhgiurhgiirhgiuhdihgihgidhfghdlkfsglskdfhgjhldshgiuhgiiuheriughiuehgihierhgihihihiuhihrhihiuhioworruouotreuoroiiiiiiiiiiiiiituuourtuprtuoertuhghghihghihgihghhhghgighsehgiehirhhrsehorgohreuhrghrghhgighirgihigrhishoesghigehihirhihohgoirhihrihihgihheshiuhrehlshirherihghghghghghghghghghg