Christine is interested in buying a new backpack. She compares the price and volume of several backpacks. Christine finds that the relationship between price and volume can be described by the following least square regression line: Predicted Price = 890 - 105(Backpack Volume).

What is the slope of Christine’s data?

a) -105 price/volume
b) -105 volume/price
c) 105 price/volume
d) 105 volume/price

step-by-step explanation:

it's 15

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

answer: 5

step-by-step explanation: