SAT College

Average heart rate for Americans is 72 beats/minute. A group of 25 individuals participated in an aerobics fitness program to lower their heart rate. After six months the group was evaluated to identify is the program had significantly slowed their heart. The mean heart rate for the group was 69 beats/minute with a standard deviation of 6.5. Was the aerobics program effective in lowering heart rate? Use a significance level of alpha = 0.01

Answers

Answer 1

Answer:

there is no significant evidence to support the claim that aerobic program was effective in lowering heart rate.

Explanation:

H0 : μ = 72

H1 : μ < 72

xbar = 69 ; s = 6.5 ; n = 25

Test statistic = (xbar - μ) ÷ s /sqrt(n)

(69 - 72) ÷ 6.5 / sqrt(25)

-3 ÷ 1.3 = - 2.3077

The Pvalue obtained from the value of the test statistic :

Pvalue = p(Z < - 2.3077) = 0.0105 = 0.011

α = 0.01

Comparing the Pvalue and α in other to make a decision:

Pvalue > α ; We fail to reject H0

Hence, there is no significant evidence to support the claim that aerobic program was effective in lowering heart rate.

Related Questions

why is my brother a mother

Answers

Excuse me what? I don’t think that’s right
i don’t think that’s possible

A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 30 people at random from a group of 100 who have "high stress" jobs. The 30 people are divided into two groups. One group acts as the control group - they receive no training. The second group of 15 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety. Use a significance level of alpha = 0.025

Answers

Answer:

poop

Explanation:

poop

With the use/abuse of alcohol, the heart is more efficient in the use of nutrients by the heart tissue.

true or false​

Answers


Answer:abuse of alcohol hinders nutrient absorption by the heart and other organs.
Explanation:alcohol interfere with the rate of digestion impairing the uptake and absorption of nutrients by damaging the cells lining the walls of the stomach and the intestines which disable the rate of transportation of the nutrients into the blood stream. This however prevent these absorbed nutrients from being fully utilized by the heart and other organs by altering their rate of transport, storage and excretion.
Other Questions
What is the formula for the volume of a prism?What is the formula for the volume of a prism? Granny needs to paint a Loge made using two right triangles the dimensions Of the loge are shown below what is the difference between the area of the large triangle in the area of a small triangle Which of the following statements about the 2018 election are accurate? Which is NOT a benefit of xenophyophores in a habitat?1 They maintain benthic biodiversity.2 They increase populations of isopods, mollusks, and crustaceans.3 They churn up sediments that build up on the ocean floor.4 They convert salt and iron into energy and nutrients. A stationary hockey puck has a mass of 0.27 kg. A hockey player uses her stick to apply a 18 N force over a distance of 0.42 m. How much work does this force do on the puck?Group of answer choices7.6 J-43 J-7.6 J28 J43 J HELP NEEDED ASAP HELP ME PLZ Wellington Corp. has outstanding accounts receivable totaling $6.5 million as of December 31 and sales on credit during the year of $24 million. There is also a credit balance of $12,000 in the allowance for doubtful accounts. If the company estimates that 6% of its outstanding receivables will be uncollectible, what will be the amount of bad debt expense recognized for the year A regular octagon is an eight-sided polygon with side lengths that are all equal. All three octagons are scale drawings of each other. Use the chart and the side lengths to compute each scale factor as a percent. How can we check our answers ack I need help please :> its in science PLSS HELP ASAP! Only answer if you know pls I'm running out of points & no links to other sites or ill report you write an equation that you can use to find the value of x 3. Look at the reaction below:H2O + C CO+ H2AH = +130kJ mol^-1Explain what happens to the position of equilibrium if we:a. increase the pressureb. increase the concentration of hydrogen gasc. increase the temperatured. add a catalyst Who was the most famous of Alexandria's inventors who made levers and pulleys What is the r-value of the following data, to three decimal places?42651181392131 why should the forest be conserved? write three reasons 40. The state of matter with definite shape and definite volume A. GasB. LiquidC. Solid A linear function that represents the number of video games purchased at an electronics store is compared to a different linear function that represents the amount of money the store made that day. Describe the key features of the functions that are needed to determine if these lines intersect Please help me answer this question Help me pls. You will get a lot of points During her ride home from school, Dana sees 15 cars driven by men and34 cars driven by women. What is the experimental probability that thenext car Dana sees will be driven by a man?