WASHINGTON – Businesses added only 115,000 jobs in April, another weak month of job creation, but the unemployment rate came down from 8.2% to 8.1% as more people gave up looking for work.

Previous months’ payroll numbers were revised upward. The Labor Department said 154,000 jobs were added in March, vs. the 120,000 estimated a month ago, and 259,000 were added in February vs. the first estimate of 240,000.

The Labor Department report said employment increased in professional and business services, retail trade and health care last month, but declined in transportation and warehousing.

The unemployment rate has fallen a full percentage point since August to a three-year low. But last month’s decline was not due to job growth. The government only counts people as unemployed if they are actively looking for work.

In April, the percentage of adults working or looking for work fell to the lowest level in more than 30 years.

Although there have been mixed signals from different sectors of the economy recently, economists say the U.S. recovery looks enduring. It’s just not very strong.

Hiring, housing, consumer spending and manufacturing all appear to be improving, yet remain less than healthy. Economists surveyed by The Associated Press expect growth to pick up this year, but not enough to lower unemployment much.

“The outlook is for continued moderate growth,” John Williams, president of the Federal Reserve Bank of San Francisco, said in a speech Thursday. “Nonetheless, we have nearly 4½ million fewer jobs today than five years ago, and the unemployment rate remains very high at 8.2%.”

The 32 economists polled by the AP late last month are confident the economy has entered a “virtuous cycle” in which more hiring boosts consumer spending, which leads to further hiring and spending. They expect unemployment to drop below 8% by Election Day.

But they still think the rate won’t reach a historically normal level below 6% until 2015 or later. And they predict hiring will slow the rest of this year from a relatively brisk December-February pace.

The government’s economic data have been sending mixed signals about the health of the recovery from the Great Recession. Here’s a look at the economy’s vital signs:

JOBS

The job market is gradually improving, though not as fast as it had been. From December through February, employers added a strong 246,000 jobs a month. That figure sank to a weak 120,000 in March.

The economists in the AP survey foresee average job growth of 177,000 a month from April through June and 189,000 for the next six months. The economy needs to generate about 125,000 jobs a month just to keep up with population growth.

On Thursday, the government said the number of people who applied for unemployment benefits last week fell by a sharper-than-expected 27,000 to a seasonally adjusted 365,000. That pointed to fewer layoffs and a brighter outlook for hiring.

Further cause for hope came in a government report Thursday on worker productivity: It fell from January through March by the most in a year. Declining productivity could be a positive sign for jobseekers. It may signal that companies are struggling to squeeze more from their workforces and must hire to keep up with customer orders.

HOUSING

The housing market has been a dead weight on the economy. The single-family home market, in particular, is still struggling. House prices dropped for six straight months through February, according to the Standard & Poor’s/Case-Shiller home-price index. And Americans bought fewer previously owned homes in March.

The economists polled by the AP worry that the lingering effects of the housing bust are slowing the economy’s expansion. They say growth can’t accelerate until national home prices finally hit bottom.

Still, spending on home construction and renovations rose from January through March by the most in nearly two years. And housing investment, led by apartment construction, is expected to contribute to economic growth this year for the first time since 2005.

The warm winter may also have led more people to buy earlier in the year, essentially stealing sales from March. Reduced prices, record-low mortgage rates, higher rents and the improving job market appear to be emboldening would-be buyers. Many seem to have concluded that prices won’t drop much further, if at all.

And builders are laying plans to construct more homes in 2012 than at any other point in the past 3½ years.

CONSUMERS

Americans have proved surprisingly willing to spend in the face of a wobbly economy. In the first three months of the year, consumer spending grew at an annual pace of 2.9%, the fastest in more than a year.

Some economists doubt consumers can keep it up. They probably can’t afford to. Americans’ after-tax income in the first three months rose just 0.6% from a year earlier. That was the skimpiest pay increase in two years. People spent more, in part, because they saved less. Economists worry that people won’t keep spending more unless their incomes grow.

On Thursday, many big retailers including Costco, Macy’s and Target, reported that sales last month came in below expectations.

CORPORATE PROFITS

U.S. companies earned more money than analysts expected January through March. They’re beating Wall Street estimates at the best rate in more than a decade. Improved earnings have propelled the Dow Jones industrial average nearly 4% since April 10.

U.S. corporations excluding banks and other financial firms are sitting on more than $2.2 trillion in cash, up from $1.7 trillion in 2009. That surplus means they can afford to expand and hire whenever they’re confident enough.

MANUFACTURING

Manufacturing has provided much of the fuel for the U.S. recovery since the recession ended roughly three years ago. American manufacturing expanded last month at the fastest pace in 10 months. New orders rose to the highest level in a year, a signal of more production in coming months. Export orders also rose, despite worries that weaker economies in Europe and China could hold back U.S. exports.

And the busier factories are hiring. Manufacturers added 120,000 jobs a month through March this year, their fastest three-month pace since 1997.

But the economists surveyed by the AP think manufacturers will fill jobs more slowly the rest of the year. If so, that could weaken overall job growth.