Test at the 5 level of significance assume the population

Reference no: EM13633431

A small electronics store has begun to advertise in the local newspaper. Before advertising, the long-term average weekly sales were $9,820. A random sample of 50 weeks while the newspaper ads were running gave a sample mean weekly sales of $10,960. Does this indicate that the population mean weekly sales is now more than $9,820? Test at the 5% level of significance. Assume the population standard deviation= $1,580. Compute the z or t value of the sample test statistic.

Reference no: EM13633431

Questions Cloud

The dome of a van de graff generator receives a charge of : the dome of a van de graff generator receives a charge of 2.0 x 10-4 c. find the strength of the electric field a

At a prominent state hospital a 45-year-old woman is : at a prominent state hospital a 45-year-old woman is receiving a lsquocombined modality treatment for the initial stage

The pulse rates for 13 adult women were as follows : the pulse rates for 13 adult women were as follows. construct a 0.98 confidence interval for the mean pulse rate. give

Find the force exerted by these charges on a fourth charge : three charges each of magnitude 7 nc are at separate corners of a square of edge length 7 cm. the two charges at

Test at the 5 level of significance assume the population : a small electronics store has begun to advertise in the local newspaper. before advertising the long-term average

A survey of 850 workers were asked how much they used the : a survey of 850 workers were asked how much they used the internet at work. 578 said they used the internet within

Sketch the area corresponding to the most extreme 1 of the : sketch the area corresponding to the most extreme 1 of the standard normal distribution using the normal curve. find

A seed crystal of diameter d mm is placed in a solution : a seed crystal of diameter d mm is placed in a solution ofdissolved salt and new crystals are observed to form at a

If you want to alter the cutoff value from 60 in order to : suppose that the drying time for a certain type of paint under specified test conditions is known to be normally

User Account

All Pages