A few years ago, people tended to have relatively large CD collections. For students at a large university in the midwest, the mean number o

Question

A few years ago, people tended to have relatively large CD collections. For students at a large university in the midwest, the mean number of CDs owned was 78 with a standard deviation of 90. To confirm these numbers, a random sample of 120 students from this university was collected and the size of their CD collections recorded. These particular 120 students had a mean CD collection size of 80 CDs. Select the correct description of the population in this study.

in progress 0
Kiệt Gia 3 years 2021-07-28T13:43:50+00:00 1 Answers 6 views 0

Answers ( )

    0
    2021-07-28T13:44:59+00:00

    Complete Question

    A few years ago, people tended to have relatively large CD collections. For students at a large university in the midwest, the mean number of CDs owned was 78 with a standard deviation of 90. To confirm these numbers, a random sample of 120 students from this university was collected and the size of their CD collections recorded. These particular 120 students had a mean CD collection size of 80 CDs. What is the numerical value of the sample mean?

    Answer:

    Sample Mean \=x=80

    Step-by-step explanation:

    From the question we are told that:

    Population Mean \mu=78

    Standard deviation \sigma=90

    Sample size n=120

    Sample Mean \=x=80

    Therefore

    The numerical value of the sample mean is

    Sample Mean \=x=80

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )