/

When the marks of a science test are graphed, the distribution of markss is symmetric with the majority of weights centered around a single peak. Which of the following describes the shape of this distribution?

A. Uniform

B. Skewed right

C. Bell-shaped

D. Bimodal

Answer Explanation:

In a bell-shaped curve, the data distribution is symmetric around a single peak. The centering of data around a single peak means the mean, mode and median of the test are all equal to each other.

Therefore, the Correct Answer is C.

More Questions on TEAS 7 Math

  • Q #1: 3(3x+3)=8x+5 Solve the equation above for x. Which of the following is correct?

    A. 1

    B. 4

    C. -1

    D. -4

    Answer Explanation

    We use the order of operation to solve for the unknown value of x.  

    3(3x+3)=8x+5

    Multiply 3 with each number in the brackets

    (3*3x)+(3*3)=8x+5

    9x+9=8x+5

    Subtract 9 from both sides

    9x+9-9=8x+5-9

    9x=8x-4

    Subtract 8x on both sides

    9x-8x=8x-8x-4

    x=-4

    Thus, the unknown value of x is -4.

  • Q #2: A student performs the following estimations. 35+192  230 258+350  610 947+1032  1980 Based on these estimations, which of the following is the student’s estimate of 694+7618?

    A. 8320

    B. 8500

    C. 8300

    D. 8310

    Answer Explanation

    Here we need to find the actual values of the additions and see the trend the student will use to estimate the given problem. The exact sum is as follows

    35+192227

    258+350=608

    947+1032=1979

    From the above calculations, it is evident that the student rounds up or down the ones place values. So, in the problem we need to approximate 694+7618.

    694+7618=8312

    We can approximate 8312 based on the provided choices is 8310.

  • Q #3: An athlete runs 7 miles in 45 minutes and then changes their pace to run the next 3 miles in 15 minutes. Overall, what is the average time in minutes it takes the athlete to run 1 mile?

    A. 9.5 minutes

    B. 9 minutes

    C. 6 minutes

    D. 10minutes

    Answer Explanation

    to find the average time the athlete runs in 1 mile; we find total distance and total time the athlete takes in running.

    Total distance run by athlete=7+3=10 miles

    Total time=45+15 =60 minutes

    The athlete runs 10 miles in 60 minutes. For the athlete to cover 1 mile, he will run for a time less than 60 minutes. Thus, in 1 mile, the athlete takes:

    So, in 6 minutes, the athlete covers 1 mile.