1 .A recent report found that students between the ages of 13 and 15 watch 14.25 hours of television per week. The distribution of times follows the normal distribution. A researcher would like to look into these findings further.A random sample of 40 students revealed the mean was 13.75 hours with a standard deviation of 1.3 hours.At the 0.05 significance level, can we conclude that this group of students watch less than 14.25 hours of television per week?

Calculate the test value for this hypothesis test rounded to2 decimal places.

Test value = [a]

Question 2

A study was looking to determine if there was a difference in televison consumption between 2 age groups (Group A (13 to 15 years) and Group B (9 to 12 years). A sample of 50 children per group was taken and the mean for group A was 13.25 hours with a standard deviaiton of 1.3 hours.The mean for group B was 13.75 hours with a standard deviation of 1.5 hours.At the 0.05 significance level, can we conclude that Group A watches less televison than Group B per week?

Which set of hypotheses should be used for this question?

Noneof the options listed applies.

H₀:_{A B}

H₁:_A= _B

H₀:_A= _B

H₁:_{A B}

H₀:_A< _B

H₁:_{A B}

H₀:_A> _B

H₁:_{A B}

3 The predicted value for the price of a truck is $26,000 when the age is 5 years.This was determined from a sample size of 19.

Given:

and

Determine the 99% Confidence Interval for the predicted value.

t - value used -

Lower Limit = $-rounded to nearest dollar.Do not include units.

Upper Limit = $-rounded to nearest dollar.Do not include units.