The standard deviation of the weights of elephants is known to be approximately 15 pounds. we wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. fifty newborn elephants are weighed. the sample mean is 244 pounds. the sample standard deviation is 11 pounds. construct a 95% confidence interval for the population mean weight of newborn elephants. state the confidence interval. (round your answers to two decimal places.) ,

The confidence interval is [240.87 , 247.13].

Step-by-step explanation:

Given : The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. Fifty newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds.

To find : Construct a 95% confidence interval for the population mean weight of newborn elephants. State the confidence interval?

Solution :

We have given that,

Sample mean, x =244

Standard deviation, s =11

Sample size, n =50

First we find the standard error,

Then we find the margin of error,

Applying t-table values,

is the t-table value

Level of significance,

From standard normal table, two tailed value of with n-1 = 49 d.f is

Substitute in the formula,

Now, The confidence of the interval is given by,

Therefore, The confidence interval is[ 240.87 , 247.13 ].

let's solve your equation step-by-step.

24−3x=−27

step 1: simplify both sides of the equation.

24−3x=−27

24+−3x=−27

−3x+24=−27

step 2: subtract 24 from both sides.

−3x+24−24=−27−24

−3x=−51

step 3: divide both sides by -3.

−3x

−3

=

−51

−3

x=17

answer:

x=17

step-by-step explanation:

mark brainliest and have a great day!

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)