In 2003, Brand A microwaves had 45% of the market, Brand B had 35%, and Brand C had 20%. This year the makers of Brand C launched a heavy advertising campaign. A random sample of appliance stores shows that of 10,000 microwaves sold, 4350 were Brand A, 3450 were Brand B, and 2200 were Brand C. Has the market changed? Test at = 0.01. = ______________
Critical Value(s) = ______________
Conclusion: ______________
The market ______________ changed since 2003.

Question

In 2003, Brand A microwaves had 45% of the market, Brand B had 35%, and Brand C had 20%. This year the makers of Brand C launched a heavy advertising campaign. A random sample of appliance stores shows that of 10,000 microwaves sold, 4350 were Brand A, 3450 were Brand B, and 2200 were Brand C. Has the market changed? Test at  = 0.01.  = ______________
Critical Value(s) = ______________
Conclusion: ______________
The market ______________ changed since 2003.

Quizplus · Accepted Answer

The Answer of In 2003, Brand A microwaves had 45% of the market, Brand B had 35%, and Brand C had 20%. This year the makers of Brand C launched a heavy advertising campaign. A random sample of appliance stores shows that of 10,000 microwaves sold, 4350 were Brand A, 3450 were Brand B, and 2200 were Brand C. Has the market changed? Test at  = 0.01.  = ______________
Critical Value(s) = ______________
Conclusion: ______________
The market ______________ changed since 2003.

In 2003, Brand a Microwaves Had 45% of the Market