In a random sample of microwave ovens, the mean repair cost was $ and the standard deviation was $. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a % confidence interval for the population mean μ. A 98% confidence interval using the t-distribution was (687,913). Compare the results. The margin of error of μ is:

Complete Question

In a random sample of 13 microwave ovens, the mean repair cost was $90.00 and the standard deviation was $15.20. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a 98% confidence interval for the population mean u. A 98% confidence interval using the t-distribution was (78.7,101.3). Compare the results. The margin of error of u is

The value  is  

Step-by-step explanation:

From the question we are told that

    The sample is  

     The sample mean is  

     The standard deviation is  

      The  lower limit of the  98% confidence interval is

      The  upper  limit of the  98% confidence interval is

Generally the margin of error is mathematically represented as

=>    

=>    

honesty mood

step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.