Write the null and alternative hypotheses

Assignment Help Mathematics

Reference no: EM13185752

Write the null and alternative hypotheses.

You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago. You take a random sample of 100 cell phone users and find an average of 135 minutes used.

A. H0: μ = 135
HA: μ > 135
B. H0: μ = 120
HA: μ < 120
C. H0: μ = 120
HA: μ ≠ 120
D. H0: μ = 120
HA: μ > 120
E. H0: μ = 135
HA: μ ≠ 135

Reference no: EM13185752

Questions Cloud

What is the probability that a freshman selected at random : What is the probability that a freshman selected at random from this group is enrolled in each of the following?

State hbs has normal shape under normal conditions : HbS has normal shape under normal conditions, but under conditions of low [O2] the hemoglobin forms fibrous aggregations, giving the entire red blood cell a sickle shape. (See image of eight HbS molecules at right.)

Which of these islands is considered a biological hot spot : Which of these islands is considered a biological "hot spot"?

Give two reasons that oil might be produced from high cost : Show that if oil is produced from two reservoirs, one with high marginal cost and one with low marginal cost, it is not possible for the Hotelling rule to be satisfied for each reservoir simultaneously. Give two reasons that oil might be produced ..

Write the null and alternative hypotheses : You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago. You take a random sample of 100 cell phone users and find an average of 135 minutes used.

Explain a catalyst lowers the activation energy : A catalyst lowers the activation energy of a reaction from 215 kJ to 206 kJ. By what factor would you expect the reaction-rate constant to increase at 25*C? Assume that the frequency factors

Find the solution of the initial value problem : if the given external source is replaced by a force of 2 cos wt of frequency w, find the value of w for which the amplitude of the force response is maximum.

Formulate the initial value problem describing the most ion : assuming that there is no damping and that the has is aced on by an external force of 2 cos3t lb, formulate the initial value problem describing the most ion of the mass.

State which compunds moves to the aqueous naoh : which compunds moves to the aqueous NaOH? Provide the chemical reaction that occured when NaOH was added. Clearly indicate the different between ionic bond and covalent bond.

User Account

All Pages