The phrase "a study stated that" is correct and usable in written English.
You can use it when referring to findings or conclusions drawn from a research study.
Example: "A study stated that regular exercise can significantly improve mental health."
Alternatives: "a study found that" or "research indicated that".
Later in 2009 a study stated that if HD 40307 c is terrestrial, tidal heating would destabilise it, in a manner greater than this process crushes the Jovian moon Io.
In Austria, 68% of the participants of a study stated that they would not provide first aid because they feared doing something wrong [ 38].
A study stated that the prevalence of unwanted births typically increases with age and parity because women who have already achieved their desired family size do not want any more pregnancies [ 12].
Her company just issued a study stating that men say they shopped for clothing 21percentt more often in 2003 than in the previous year.
The Environmental Protection Agency released a study stating that the dust found in these countries contains toxins, bacteria and metals that can lead to health problems.
Earlier this year, The Journal of the American Medical Association published a study stating that underweight and obesity (a BMI of 30 or more) were both associated with an increased risk of death.
And the market research firm Global Industry Analysts last year released a study stating that the global private tutoring market is projected to surpass $102.8 billion by the end of next year.
Recently Pew Research Center released a study stating that Millennials most popular living arrangement is living at their parent's house at 32.1%.
The Department of Justice recently released a study stating that blacks and Hispanic individuals were approximately three times more likely to be searched at a traffic stop than a white person.
The group also pointed to a study stating that the amount of water used to produce beef was nearly three-times the amount claimed by Cowspiracy (presumably Andersen intentionally used low estimates to avoid criticism) and cited the United Nations in claiming animal agriculture was more responsible for global climate change than the totality of automobiles on the road today.
A previous study stated that 15% is a critical value for floor and ceiling effects [ 40].
