The heights of dogs, in inches, in a city are normally distributed with a population standard deviation of 3 inches and an unknown population mean. if a random sample of 17 dogs is taken and results in a sample mean of 28 inches, find the error bound (ebm) of the confidence interval with a 90% confidence level.

1.2703

Step-by-step explanation:

Given : Sample size : n= 17, which is a small sample (n<30), so we use t-test.

Significance level :

Then , Critical value :

Standard deviation:

The formula to find the margin of error : -

Hence, the error bound (EBM) of the confidence interval with a 90% confidence level.=1.2703

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

answer: 8d

step-by-step explanation:

45+5= 50+5=55+5=60