Aresearchers wants to determine the mean weight of avocados grown in southern california. the population from which the sample is drawn is such that the weight of the avocados is approximately normally distributed for the sample. the size of the sample is 9, the sample mean determined from this sample is 6 ounces, and the sample standard deviation determined from this sample is 0.75 ounces. the researcher by determining the 90% confidence interval for the true mean weight of these southern california avocados. (this problem will be solved after lecture on confidence intervals.)

(0.465, 5.535)

Step-by-step explanation:

Formula to calculate the confidence interval (when population standard deviation is unknown) is given by :-

, where = sample mean.

s= sample standard deviation.

n= Sample size.

= critical value

By considering the given information , we have

s=0.75

n= 9

Significance level =   [1-0.90=0.1]

By using students' t distribution -table , the critical value for 95% confidence level :

[Note: degree of freedom = n-1]

Now, the 90% confidence interval for the true mean weight of these Southern California avocados will be :

Hence, the required confidence interval  =(0.465, 5.535)

it's

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.