A teacher keeps track of the number of students that participate at least three times in an optional study session each year. He
models the attendance over the last nine years with this function. n(t) = 3.53t^2 - 33.04t + 117.56 Which graph would most likely be associated with the given model?
2 answers:
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Answer:
a) Null and alternative hypotheses are:
: mu=183 days
: mu>183 days
b) If the true mean is 190 days, Type II error can be made.
Step-by-step explanation:
Let mu be the mean life of the batteries of the company when it is used in a wireless mouse
Null and alternative hypotheses are:
: mu=183 days
: mu>183 days
Type II error happens if we fail to reject the null hypothesis, when actually the alternative hypothesis is true.
That is if we conclude that mean life of the batteries of the company when it is used in a wireless mouse is at most 183 days, but actually mean life is 190 hours, we make a Type II error.
Answer:
There are 250 nails and 150 screws in the bucket.
Step-by-step explanation:
Let Number of nails in bucket be x.
Also Let number of screws in the bucket be y.
Together, there are 400 fasteners in the bucket.
Hence the equation can be framed as;
Also Given:
The number of nails in the bucket is 50 less than twice a number of screws.
Hence the equation can be framed as;
Substituting the value of x in equation 1 we get;
Now we have value of y we will substitute in equation 1 we get;
Hence there are 250 nails and 150 screws in the bucket.